hybridfree/eevblog-posts huggingface dataset:
Where is the record function in the Rigol DS1104 scope - Page 1
Forum section: electronics / testgear

author: rbola35618
author_rank: Frequent Contributor
timestamp: December 07, 2013, 03:15:29 am
content: Hi guys,I am evaluating the new DS1104 scope. I can't seem to fine where the record function is. I looked in the user manual and it says it should be under the Utiltities menu. I can't find it. Am I having a senior moment or do I have an older model. I thought maybe some of you might know.Thanks in advance.https://www.youtube.com/watch?v=At3xddUaUdE&feature=em-upload_owner#action=share

author: marmad
author_rank: Super Contributor
timestamp: December 07, 2013, 05:55:55 am
content: The Record feature is a purchasable option on the DS1000Z series. I don't know where/when you got the DSO, but it would have originally come with a certain amount of Trial minutes with the options enabled - but they might have been used up by now.

author: tautech
author_rank: Super Contributor
timestamp: December 07, 2013, 08:11:03 am
content: Quote from: marmad on December 07, 2013, 05:55:55 amREALLY.Standard feature in Siglent's even the Siglent handheld DSO.

author: marmad
author_rank: Super Contributor
timestamp: December 07, 2013, 02:44:38 pm
content: Quote from: tautech on December 07, 2013, 08:11:03 amAre 4-channels, intensity-grading, and 30,000 wfrm/s for $585 standard too?It just depends what your priorities are.

author: Dave Turner
author_rank: Frequent Contributor
timestamp: December 11, 2013, 11:43:12 pm
content: Set Horizontal time base to YT. Then Utility - Record - Record.See chapter ten of the DS1000Z user guide -www.batronix.com/pdf/Rigol/UserGuide/DS1000Z_UserGuide_EN.pdf
Maximum reflow temperature question - Page 1
Forum section: electronics / testgear

author: SolarSunrise
author_rank: Regular Contributor
timestamp: December 10, 2013, 07:13:30 pm
content: Hi there, I'm sorry for this potentially newbish but confusing question... Here we go:I'm planning to reflow my PCB containing IC's which are: ADS1256, LMP7702, and OPA350.In the datasheets, they only specify the lead temperature for soldering:- ADS1256: 300C for 10s- LMP7702: 260C for 10s- OPA350: 300C for 10sSo for reflow, do I just follow the temperature curve specified for my solder paste or should I make some adjustments? In case I missed anything here's the manufacture's links for the parts:http://www.ti.com/product/ads1256http://www.ti.com/product/lmp7702http://www.ti.com/product/opa350

author: SolarSunrise
author_rank: Regular Contributor
timestamp: December 10, 2013, 07:21:27 pm
content: I just realized that this thread was under "Test Equipment" section... I'm sorry for the sort-of off topic thread... I'll try to fix it, if I can't, I'll look up to the moderators!

author: Kjelt
author_rank: Super Contributor
timestamp: December 10, 2013, 07:38:47 pm
content: If you look at the links you provide there is this table that states max. reflow temperature. See below for the ads1256 it is 260 degrees C.If you google on Texas Instruments reflow profile you see a standard reflow profile.I would still follow the temperature curve for the solderpaste unless it really deviates from the standard profile.
Flir i3 hacks - Page 1
Forum section: electronics / testgear

author: mpmitch2000
author_rank: Newbie
timestamp: December 10, 2013, 12:20:18 pm
content: Can anyone show some hacks for the Flir i3I done the one they show on the net where it makes it a i7 and works a treat.But I been told when rebooting it makes it go back to normal so is there a way to fix this?.Please help Guys.
Rigol DSA815-TG or Used HP 8924C ?? - Page 1
Forum section: electronics / testgear

author: jstarr
author_rank: Regular Contributor
timestamp: October 18, 2013, 03:18:32 am
content: I am a ham radio and electronics hobbyist and love to tinker. I restore old boatanchor radios and like to play with PICS/Arduino's etc. As I approach retirement I want to expand my testbench and I have an opportunity to buy a very nice like new shape HP8924C (functionally same as 8920A) or go for the new Rigol DSA815+TG. I know the specs on the HP exceed the Rigol but I am uncertain what to do. Any advice greatly appreciated.tiajohn

author: dr.diesel
author_rank: Super Contributor
timestamp: October 18, 2013, 10:16:23 am
content: I bought the 815 because it's a nice small package and fits well on my lab bench. It also has the capability to save screenshots, which is nice when doing web reviews or documentation.As a Ham operator myself the 815 specs have been more than adequate for testing filters etc.

author: lacommtech
author_rank: Newbie
timestamp: October 18, 2013, 04:46:16 pm
content: I happen to have both instruments.The DSA815-TG is great for portability and general size where you don't need the capabilities of a service monitor. If you want to work with filters, tune duplexers, check feed lines and antennas, the Rigol is adequate and has some advantages (such as the ability to display multiple traces, easily download screen-shots, etc). I prefer it to the 8924C for these applications although I would hesitate to connect it directly to an antenna in a high RF environment.The 8924C is a full communications service monitor. If you are working on radios, you will probably find it a better choice, unless you already to have the various pieces of test equipment that it incorporates. Assuming that you get one with the 60 or 100 watt RF input, you can directly connect a transmitter/transceiver to the 8924C without destroying the instrument if you accidentally key the radio. It is definitely a bench instrument and too heavy to move around.

author: jimeagle
author_rank: Newbie
timestamp: December 10, 2013, 05:52:14 am
content: Having used both also, I would agree fully with lacommtech's analysis.
Finest 701 DMM - Page 1
Forum section: electronics / testgear

author: Simon123
author_rank: Regular Contributor
timestamp: December 01, 2013, 03:37:06 pm
content: Hello!I am thinking about buying Finest 701(UEI 391 on mm shotout)Does this meter have automatic hold function or just press, when you want to hold ?Thanks!

author: retiredcaps
author_rank: Super Contributor
timestamp: December 01, 2013, 06:02:01 pm
content: Quote from: Simon123 on December 01, 2013, 03:37:06 pmThe latter. Seehttp://www.finest.co.kr/pdf/701-703manual.pdf

author: Simon123
author_rank: Regular Contributor
timestamp: December 10, 2013, 03:49:59 pm
content: What hapens, when it(if) detects, that terminals arent pluged in proprely?
Rigol DS2xx2A and DS2xx2A-S - Page 1
Forum section: electronics / testgear

author: branadic
author_rank: Super Contributor
timestamp: December 03, 2013, 05:41:37 pm
content: Hi,does anyone know more about the new revision A models?They are now available with bandwidths up to 300MHz and I was told by a german reseller that the new version also includes switchable input impedance 1Mohm / 50ohm, but I couldn't find any hint to that in the web. If that were really the case that would be great, wouldn't it?

author: Carrington
author_rank: Super Contributor
timestamp: December 03, 2013, 05:58:03 pm
content: Hi branadic.Yes, it's true. For the non A version there is already a firmware that allows 300MHz, courtesy of Cybernet.https://www.eevblog.com/forum/testgear/sniffing-the-rigol%27s-internal-i2c-bus/msg337249/#msg337249https://www.eevblog.com/forum/testgear/rigol-ds2000-hardware-version-2-0/Cheers.

author: neslekkim
author_rank: Super Contributor
timestamp: December 03, 2013, 06:32:50 pm
content: but what is the thing/status about the LMH6518 in these?, it seems like that is something that is limiting an hacked scope somewhat?, or did I misunderstand that ?Some say that hardware in ds2072 is same as ds2102, but it is the same also in ds2202?Wonder how that is for the A series..

author: Teneyes
author_rank: Frequent Contributor
timestamp: December 04, 2013, 01:13:38 am
content: Quote from: neslekkim on December 03, 2013, 06:32:50 pmthe LMH6518 is varible BW gain Amplifier, see plotsee there is no settings for 70MHz in this clipso 70 is same as 100also note that the BW settings on the DS4000 are 20, 100,200, 350 all part of this clipalso 20 100 200MHz limit on the DS2302A

author: NikWing
author_rank: Regular Contributor
timestamp: December 08, 2013, 09:40:59 pm
content: would be very interesting to know more about thatI've decided to get a DS2101A-S in the near future and I somehow try to find out what's possible with this(unlocking features *cough*)and trying to find out infos about the waveform gen insidesince you can copy waveforms from Rigol DSO to wavefrom gen, it should be possible that the integrated gen also features thisit would be nice if the clever people here look into the new generation DSOsmaybe I can help out gaining data and stuff with a jtag whenever I got this DSO, as long as it won't die and as long as someone instructs me then
Affordable ESD simulator? - Page 1
Forum section: electronics / testgear

author: pinkman
author_rank: Regular Contributor
timestamp: December 05, 2013, 03:17:45 pm
content: Does anyone have any suggestions for a good ESD simulator? I have used the NoiseKen guns which are nice but a little pricey.I need a simulator which can accommodate the following models, and test up to 25kV (15kV OK but I really prefer 25kV):2kOhm/150pF2kOhm/330pF330Ohm/150pF330Ohm/330pFI have been looking around and there seems to be very little available in the used market.
RP3300 HF compensation. - Page 1
Forum section: electronics / testgear

author: Carrington
author_rank: Super Contributor
timestamp: December 04, 2013, 12:23:13 am
content: Hi guys!In my RP3300 probe the hole that allows access to the HF compensation is covered.Anyone know if the trimmer remains below?http://www.batronix.com/pdf/Rigol/RP3300.pdfThanks.

author: Harvs
author_rank: Super Contributor
timestamp: December 04, 2013, 12:28:22 am
content: That's because the trimmer is in the box that's on the BNC connector end of the lead.

author: Carrington
author_rank: Super Contributor
timestamp: December 04, 2013, 11:04:41 am
content: Quote from: Harvs on December 04, 2013, 12:28:22 amAre you saying that the HF trimmer is also in that box?

author: Harvs
author_rank: Super Contributor
timestamp: December 04, 2013, 12:19:09 pm
content: Sorry, I've never actually read the manual, I assumed there was only ever the one trimmer. I've got no idea
Tektronix 2465b calibration - Page 1
Forum section: electronics / testgear

author: Jeff5341
author_rank: Newbie
timestamp: December 02, 2013, 10:28:38 pm
content: I am looking to obtain a time mark generator to calibrate two Tek 2465b scopes with bad a5 boards (ram lost all data). The tek 184 only has minimum 10 ns pulse. Wondering if the tg 501 would be suitable for this, and if so, can any of the tek plug-ins modified to be used without the mainframe? This is such a great scope, I miss using it!Jeff

author: eurofox
author_rank: Unknown
timestamp: December 02, 2013, 10:46:14 pm
content: Quote from: Jeff5341 on December 02, 2013, 10:28:38 pmHi,I have as well a Tek 2465B, really great scopes, I have as well a TG 501 and PG 506, with the TG 501 you can calibrate time but not amplitude, with the PG 506 you can do both.I advise to find a "single frame" to fit the plug-in.eurofox
How to replace a GR-874 on a GR trombone - Page 1
Forum section: electronics / testgear

author: PA4TIM
author_rank: Super Contributor
timestamp: December 01, 2013, 06:31:54 pm
content: I have a lot of GR gear and yesterday a friend brought a GR-605A and two constant impedance trombones. One was in bad shape. I managed to fix it so it slides again but now I have to replace one the connectors ring and center conductor of the GR874 locking connector. I have the parts, I know how to mount chassisparts and how to mount them to coax. But this one is mounted to I do not know if the connector is soldered to the trombone or screwed. I do not have the GR mounting kit andI do not want to dammage the tube.Any one has experience with these ?
Dealing With Depth Of Test Equipment On Standard Benches - Page 1
Forum section: electronics / testgear

author: Dawn
author_rank: Regular Contributor
timestamp: December 01, 2013, 07:02:47 am
content: This never seemed to be an issue until we purchased a TEK 7600 series scope and couldn't figure what to do with it without placing it diagnal and eating up much of a bench surface. Our existing scope carts had been turned into carts to hold service monitors that while weren't anywhere as deep, still ate bench space the older ones didn't. Risers on most benches were slimming down from the old 16/17" depths to 12 or 10" and benchtops were still available in 30 and 34" depths on modular units. We still had the 16" risers and 34" benchtops from the 70's. Those were designed to accomodate an uncased or cased standard rack mounted unit on either level.Then not only the scopes, but other pieces test equipment began migrating to near 30" deep falling around 27" without cables on the rear. This created a lot of headaches and rearrangement in the shop using steel shelving behind the benches and overall making a mess of the original floor layout. Short of going back to hand made wood benches that we abandoned in the early 70's, this was the best solution besides using utiltity carts meant for materials handling. In some cases, extended depth racks were used requiring expensive slide/glide setsThankfully, in the past 10 years, equipment has gotten much smaller, much in part to electrolumenescent and LCD displays. Still, lab grade equipment was being designed with those depths and probably still is. Designers seemed hell bent to keep the front panels no larger then 17" and allowed for rack ears. Extended racks were often not an effective option and long bed carts quickly eat floor space.How did your shops and labs deal with this problem or were the workspaces already developed with these deeper form factors in mind?
Oscilloscope score at local Ham Radio auction--Tektronix 7904 w/ 4 plugins--$15! - Page 1
Forum section: electronics / testgear

author: N2IXK
author_rank: Frequent Contributor
timestamp: November 30, 2013, 04:00:19 pm
content: Sold a bunch of junk at my local radio club auction last night, and ALMOST made it out the door without buying anything. But then this guy went on the block, described as "not working" with no takers at a starting bid of $20. I really didn't NEED a 4th oscilloscope in my already cramped home lab, but when the price got dropped down to $15, I figured it would be good for parts and scrap aluminum if nothing else, so it ended up following me home.Turns out, all the thing needed was to pull and reseat the plugins, and it came to life. Even the calibration seems pretty good.This is a 500 MHz mainframe, which came with 2 7A26 dual trace vertical amps, and 7B85 and 7B80 timebases. As configured, it is a 4 channel, 200 MHz scope, with the capability to display 2 different timebases at the same time. With a spectrum analyzer plugin, you could have both a time domain and frequency domain display on the screen at the same time. Property tags indicate that it was surplussed out of CBS-TV central engineering lab.Pretty dirty inside, but a brush and shop-vac should take care of that. One busted knob, that I should have a replacement for somewhere. A shot of deoxit on a few dirty pots and switches, and I think I have a keeper. Certainly the most capable scope I have ever owned, and wretched overkill for most of the work I do at home. Will probably sell off my Tek 7623 storage scope to make room for this beast....any takers?

author: GreyWoolfe
author_rank: Unknown
timestamp: November 30, 2013, 10:54:29 pm
content: Lucky you! I never find deals like that. The best deal I came up with was a MFJ-259 for $15. Good luck with your new toy.Tom, NW0LF

author: TheBorg
author_rank: Frequent Contributor
timestamp: November 30, 2013, 11:22:01 pm
content: Quote from: GreyWoolfe on November 30, 2013, 10:54:29 pmWelcome to my life

author: GreyWoolfe
author_rank: Unknown
timestamp: December 01, 2013, 05:26:10 am
content: Actually, now that I think about it, I have gotten some decent deals. At the Melbourne, FL hamfest this year, I did score a Fluke 1952A counter/timer in working condition for $10. Also got a Tektronix 2235 in unknown condition but powered on for $40. I just had to clean the horizontal and vertical amplifier controls and the scope works fine. Still, nothing like N2IXK. Maybe I'll have better luck at the Orlando hamfest next year.
Yokogawa CL220 clamp meter - Page 1
Forum section: electronics / testgear

author: reagle
author_rank: Unknown
timestamp: November 29, 2013, 08:59:06 pm
content: Just did a brief writeup on my new toy:http://kuzyatech.com/new-toy-yokogawa-cl-220-clamp-meterNow with a uRuler for good measure

author: TMM
author_rank: Frequent Contributor
timestamp: November 30, 2013, 05:26:13 am
content: Surprising to see it uses button cells, even for a compact unit. I wonder if the current draw from the batteries is low enough to prevent miserable battery life.

author: reagle
author_rank: Unknown
timestamp: November 30, 2013, 02:42:52 pm
content: I am measuring sub 6mA draw, manufacturer claims 9mALR44 is anywhere between 200mah and 600mAh, so clearly the 100 hours claimed life is probably when on but with sleep mode naps in between
New Owon VDS2062 PC Oscilloscope review - Page 1
Forum section: electronics / testgear

author: kerrinal
author_rank: Contributor
timestamp: June 18, 2013, 06:57:50 am
content: You May find it on ebay or amazon platform.But That is a new scope.I don't guarantee that.USB??VDS3102/VDS2062 ?OWON???!!

author: AndrejaKo
author_rank: Frequent Contributor
timestamp: June 18, 2013, 12:48:14 pm
content: Interesting! Seems to have most of the functionality of the SDS series, except large memory in XY mode. I wonder if it's faster than the benchtop version. Also there's nothing about it on their Chinese site.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: June 18, 2013, 01:48:34 pm
content: Selecting voltage and timebase settings from a (scrolling) pop-up menu...yuk! typical clueless Chinese UI design.

author: artag
author_rank: Super Contributor
timestamp: November 29, 2013, 11:38:31 pm
content: Any more news on this device yet ? It's starting to be available from a few suppliers.I agree with Mike about the UI for timebase, but one of the interesting possibilities is to write better software for this class of device - maybe it could be as smooth and usable as Saleae's logic analyser interface.

author: uboot
author_rank: Contributor
timestamp: November 30, 2013, 10:07:53 am
content: I'm also considering the Owon VDS series now - as Hantek 60x2BE turned out to be crap and Hantex 2xxx looks overpriced compared to Owon VDS.The software in the video above looks promising but not as feature-filled as with desktop DSOs.Looking at the specs (input sensitivity, sample depth, sampling rates), my hope is that the VDS2062 and VDS3102 share a lot of circuitry with the SDS6062 / SDS7102.As there are no software downloads for the VDS, it would be interesting if someone who owns it could compare USB drivers and PC software between VDS and SDS series.And what about build quality / hardware internals?EDIT: quote fromhttp://owon.freeforums.org/new-owon-vds2062-vds3102-pc-oscilloscopes-t32.htmlQuote

author: frenky
author_rank: Unknown
timestamp: November 30, 2013, 11:29:02 am
content: Quote from: uboot on November 30, 2013, 10:07:53 amSoftware seems to be here:http://www.owon.com.cn/service_down.asp?SortID_1=1But you have to register.I'm also looking into this DSO because it's quite cheap and PC based.Found good offer here:http://www.tigal.com/product/3644that is 287€ with VAT.But lack of any English site with regular software updates is a bit scary to me because software is everything with PC based products...
[Solved] TTI EX354R Unstable output problem - Page 1
Forum section: electronics / testgear

author: Anachron
author_rank: Contributor
timestamp: December 01, 2013, 10:43:38 am
content: Hello everyone!Hopefully this is the right place to post that, if not I am sorry!I own a second hand TTI bench supply model EX354R and lately I am experiencing problems with the stability of the output on both channels, after having it loaded with a big load parallel on both outputs. The actual voltage will jump around a lot, down to 3 volts from the set value and almost all the time it will always undershoot even if it stabilizes finally. When cycling the outputs on and off a few times, it will eventually work properly, mostly on the 1st channel, but there is obviously something wrong with it.I figured the best place to get advice on what might be going on would be hereIf anyone has any clues on where to start investigating I would be really grateful!Will post pictures/videos if anyone thinks it might help.Thanks everyone in advanceAnachron

author: Zbig
author_rank: Frequent Contributor
timestamp: December 01, 2013, 10:55:29 am
content: What kind of load are you using? If it has heavy inductive properties, I'd expect all kinds of weirdness.

author: Anachron
author_rank: Contributor
timestamp: December 01, 2013, 10:59:16 am
content: Hi, thanks for the reply, it was a 200w CB power amp that I was testing, both channels limited to 4 amps.This behavior though continues even with both of the channels not loaded, like the load has damaged the voltage sense circuitUPDATE:I am pretty sure I found the culprit, it's most likely the on/off output switches. In both channels, possibly from the high current of the load the contacts partially welded together or gunk has accumulated(?). Once you click it in you also have to pull the button out and good contact is made, and then the output is stable and correct once againFurther investigation is needed, but now I don't have the time. Teardown and switch replacement will follow, as will pictures for anyone who might be facing the same issue.Cheers
Rigol Ultra Station for DG4000 RIGOL - Page 1
Forum section: electronics / testgear

author: cubitus
author_rank: Regular Contributor
timestamp: November 29, 2013, 06:57:46 pm
content: HelloWith the generator DG4162 RIGOL There are currently software "Ultra sation" it allows you to edit on PC wave and download.Do you know a way to get the full version?Will he other compatible software?thank you

author: Wim13
author_rank: Frequent Contributor
timestamp: November 29, 2013, 07:11:55 pm
content: You have the trail period, in which you have the fool version1. put back the date, and it works2. ask for a key at Rigol

author: cubitus
author_rank: Regular Contributor
timestamp: November 29, 2013, 08:05:09 pm
content: QuoteIs it free?
HP 3456A DIY serial read out - Page 1
Forum section: electronics / testgear

author: Harvs
author_rank: Super Contributor
timestamp: November 28, 2013, 11:11:39 pm
content: With my 3456A now working, I was very keen to get the readings out of it and into the tablet app. So I had a play around with the GPIB port last night.Turns out to be very easy in Talk Only mode.If anyone's interested in doing it, just grab a uC, attach the first 7 data lines, DAV and NDAC lines and the code's below.Now to see if I can get my hands on the proper connector...Code:const int DAV = 10; // Data Validconst int NDAC = 11; // Not data acceptedbyte data;void setup() {Serial.begin(115200);pinMode(DAV, INPUT);pinMode(NDAC, INPUT);digitalWrite(NDAC, LOW);pinMode(2, INPUT); //D0pinMode(3, INPUT); //D1pinMode(4, INPUT); //D2pinMode(5, INPUT); //D3pinMode(6, INPUT); //D4pinMode(7, INPUT); //D5pinMode(8, INPUT); //D6}void loop(){pinMode(NDAC , OUTPUT);if(digitalRead(DAV) == LOW){data = 0;if(digitalRead(2) == LOW)data |= (1<<0);if(digitalRead(3) == LOW)data |= (1<<1);if(digitalRead(4) == LOW)data |= (1<<2);if(digitalRead(5) == LOW)data |= (1<<3);if(digitalRead(6) == LOW)data |= (1<<4);if(digitalRead(7) == LOW)data |= (1<<5);if(digitalRead(8) == LOW)data |= (1<<6);Serial.write(data);pinMode(NDAC , INPUT);}}

author: george graves
author_rank: Super Contributor
timestamp: November 28, 2013, 11:24:04 pm
content: subscribed!

author: Harvs
author_rank: Super Contributor
timestamp: November 29, 2013, 02:44:27 am
content: Quote from: george graves on November 28, 2013, 11:24:04 pmDo you have one of these meters?Just thinking I could get a board made through itead with the proper connector and a USB + Bluetooth interface. The connector is $5.50 from digikey, plus all the other parts, it'd probably cost around $20. Would anyone else be interested?

author: macboy
author_rank: Super Contributor
timestamp: November 29, 2013, 03:03:11 pm
content: I like the trick of emulating an open-collector I/O by switching the pin between input and output(0). That's something not everyone thinks to do.The only thing I would add is that you should ensure that all inputs are TTL level compatible (2.0 V and up is High). With CMOS level inputs, it may not work well.
Pintek curent probes - Page 1
Forum section: electronics / testgear

author: isak
author_rank: Newbie
timestamp: November 28, 2013, 01:27:10 pm
content: Hi guys,I was thinking about buying a current probe.There is a company named Pintek that seemingly makes rather good probes at low price.For example the PA-699 costs about $700, and has a DC to 1.5MHz bandwidth.The specs looks rather good on paper.http://www.pintek.com.tw/files/pintek/PA699-DM-back.pdfDoes any of you have an experience with this company or with those current probes?Thanks, Isak.

author: ivaylo
author_rank: Frequent Contributor
timestamp: November 29, 2013, 03:06:20 am
content: Never heard of them. But for that price you can get a second hand Tek or Agilent current probe on ebay with a much better spec, I think.
Broken fluke 77 series 1 need a schematic - Page 1
Forum section: electronics / testgear

author: Napalm2002
author_rank: Regular Contributor
timestamp: November 18, 2013, 04:56:34 pm
content: Hi guysI have a broken fluke 77 series 1 meter. Will not turn on. Anyone have a schematic?Mike m

author: dfmischler
author_rank: Frequent Contributor
timestamp: November 18, 2013, 05:01:28 pm
content: I found several links with PDF files when I googled "fluke 77 maintenance manual" or "fluke 77 service manual". I don't know if any of these is the right one for your meter.

author: Vuk
author_rank: Newbie
timestamp: November 18, 2013, 09:44:43 pm
content: http://www.testitnow.co.uk/media/files/test_equipment_manuals/Fluke/Fluke%2070%20Series%20(PN731034%20January%201984%20Rev%201%2005-89)%20%20Service%20Manual.pdf

author: Napalm2002
author_rank: Regular Contributor
timestamp: November 19, 2013, 05:56:53 pm
content: Thank you

author: retiredcaps
author_rank: Super Contributor
timestamp: November 27, 2013, 06:00:03 pm
content: Quote from: Napalm2002 on November 18, 2013, 04:56:34 pmJust curious, did you get this working?

author: Napalm2002
author_rank: Regular Contributor
timestamp: November 28, 2013, 03:30:55 pm
content: In the middle of a huge move and it's killing me. I will get to it soon!
Tracking Generator for an HP8569B - Page 1
Forum section: electronics / testgear

author: madshaman
author_rank: Frequent Contributor
timestamp: June 18, 2013, 07:46:02 pm
content: Hi all, I'm looking for a tracking generator compatible with my HP8569B spectrum analyser.I'm looking at a used HP8444A; will it work?Any other/better suggestions? (Ideally would like something that would go higher than 1.3Ghz, maybe up to 3?)

author: swingbyte1
author_rank: Contributor
timestamp: June 19, 2013, 06:05:07 am
content: Hi,The 8444a will work with the 8569A, however, you need the opiton 58/59. These opitons include an internal 500MHz LO with the 59 extending the range to 1.5GHz. I would advise you to join the Yahoo HPAgilent group for more information.Tim

author: mhzghz
author_rank: Contributor
timestamp: June 20, 2013, 04:24:16 am
content: Take the 1st LO output (2 - 4.4 GHz) on the front panel into the LO port of a high-quality microwave mixer, like a M/A-Com or Watkins-Johnson M1H.Apply a 2.050 GHz signal from an external signal generator on the RF port of the mixer, around -10 to 0 dBm.The IF output of the mixer will then track the HP8569 in the 0.01 - 1.8 GHz setting. There should be a 3 dB attenuator pad on the IF output of the mixer.Connect the IF output from the mixer to the RF input of the HP8569B to get your baseline response.Store that response in Trace B by using "STORE VIEW" or "STORE BLANK."Connect up your device to test, then press "INP-B->A" to normalize the response.On the 1.7 to 4.1 GHz setting, use the same mixer but put a 321.4 MHz signal on the IF port and take the output from the RF port.The other ranges are based on harmonics of the LO, so it's a little harder to homebrew a tracking generator there.Try to get ahold of an old HP8620C sweep generator (and plug-ins) and use the HP8569B's "MAX HOLD" setting when sweeping the device to test.

author: madshaman
author_rank: Frequent Contributor
timestamp: June 20, 2013, 03:05:15 pm
content: Quote from: mhzghz on June 20, 2013, 04:24:16 amThanks! That's a pretty cool trick and I have everything I need for it!QuoteI do have an HP8620 but only one plugin, time to hit ebay.I've heard of others using a sweep generator and "MAX HOLD", how is the accuracy of the response obtained?

author: madshaman
author_rank: Frequent Contributor
timestamp: June 20, 2013, 10:42:58 pm
content: Quote from: swingbyte1 on June 19, 2013, 06:05:07 amThank-you Tim, will do!

author: mhzghz
author_rank: Contributor
timestamp: November 27, 2013, 08:45:16 am
content: Tracking Generator for a HP8569 Spectrum Analyzerhttp://qsl.net/n/n9zia/tracking/
Question About Network Signal Analyzer - Page 1
Forum section: electronics / testgear

author: Cigarsnob
author_rank: Regular Contributor
timestamp: November 27, 2013, 01:20:33 am
content: Hey everyone,This may be a foolish question and I may be missing something, but I have a question regarding using a Network Signal Analyzer (Specifically, I'm using an SRS SR780)I'm testing a transimpedance amplifier and instead of using a photodiode, I'm using a capacitor and a triangle waveform to generate a pulse of current. See the link below for the test setup. The second picture is that of a narrow span and the third is for a full span. My test signal is a 1kHz triangle wave. I would expect to see the 1kHz signal with a narrow pulse and then all the odd harmonics. But when I go into full span mode, my 1kHz signal is rather wide (if you measure from beginning to end of transition for that signal. When I reduce the span, the width of that signal gets narrower and narrower. Ultimately showing something that I would expect.http://imgur.com/a/nHE1vAm I not using the instrument properly? Not reading it correctly? Using the wrong setup on the instrument?

author: Rufus
author_rank: Super Contributor
timestamp: November 27, 2013, 01:32:31 am
content: Quote from: Cigarsnob on November 27, 2013, 01:20:33 amWatch thishttps://www.eevblog.com/forum/testgear/spectrum-analyzer-rbw-and-vbw/msg336294/#msg336294Your analyzer has the same issue, line width being the rough equivalent of RBW, but, maybe you can't do more than 400 lines.

author: Cigarsnob
author_rank: Regular Contributor
timestamp: November 27, 2013, 01:53:20 am
content: Quote from: Rufus on November 27, 2013, 01:32:31 amThank you...I checked and I'm tapped out at 800 lines. I currently have that selected and it does help.
Putty like terminal that lets you see values in hexadecimal - Page 1
Forum section: electronics / testgear

author: Mr.D2
author_rank: Newbie
timestamp: November 25, 2013, 09:15:40 pm
content: So, in my project i need to test a rather complicated modem, and i'm trying to send commands using a USB-RS232 adapter linked to a TTL logic converter.I need a program like putty that lets me send specific number in hexadecimal (because the alphabet of the target integrated circuit is different- GSM alphabet) and that lest me set the endianess and also receive the information and display in exadecimal... any pointers?Best regards,

author: Unknown
author_rank: Unknown
timestamp: November 25, 2013, 09:23:57 pm
content: RealTerm might work.

author: Mr.D2
author_rank: Newbie
timestamp: November 25, 2013, 10:19:52 pm
content: It works wonderfully, thank you so much.Best regards

author: enz
author_rank: Regular Contributor
timestamp: November 25, 2013, 11:16:39 pm
content: HTerm may also be worth a look:http://www.der-hammer.info/terminal/
Cal data on HP 8591A SA - Page 1
Forum section: electronics / testgear

author: willb
author_rank: Regular Contributor
timestamp: November 25, 2013, 10:59:30 pm
content: I'm an idiot.I've been meaning to back up the cal data on my 8591A but forgot about it, and got lazy. When I powered the unit today, I got a bunch of errors. After taking the cover off, sure enough, BT101 is completely dead... Cal data is now lost. Great. Now the unit is all out of whack, with a constant FREQ UNCAL error. Am I correct to assume this is a lost cause unless I send the unit to a proper cal lab once I replace the battery??? I got the machine for fairly cheap (was failing it's self cal, all it needed was an adjustment on one of it's RBW filters), so I don't want to spend more on getting it cal'd then what the SA cost me.I do have access to calibrated HP 8593E's at work, not that I think that will help.Any input would be fantastic.
HP6024A PSU restoration project part II (load switch) - Page 1
Forum section: electronics / testgear

author: nctnico
author_rank: Super Contributor
timestamp: November 25, 2013, 10:27:28 pm
content: A while ago I bought a pair of 6024A PSUs:https://www.eevblog.com/forum/testgear/hp6024a-psu-restoration-project/I ended with stating I wanted to replace the 0.75 turn pot in one and add a load on/off switch. Meanwhile I got the parts and started working. The pot on the left had to go:The previous owner use a bit of steel or brass wire to hold the replacement pot:I bought a 10-turn pot from Ebay. It says Bourns on the rear but I'm pretty sure its a low end knock off. The minimum resistance is 8 Ohms so the PSU is likely to have some offsetThen again I had to use a file to make the round pot square-ish to make it fit. There was a risk of damaging the pot. I used some sealant to glue it in place:Another problem was that the original pot was 2.5k which is very hard to obtain in a 10 turn variant. I used a 5k pot instead with 5k parallel to the wiper and one of the lugs. This method gives a more linear response than connecting a resistor parallel to the lugs.The next order of business is the load on/off switch. This switch is connected in parallel with the voltage setting potmeter. When the potmeter is shorted the output voltage is forced to 0V. After long consideration I decided the best place for the switch was next to the current potmeter. I didn't wan't to put the switch too much on the side of the front because it may get bumped and break. I would have liked to align the switch with the voltage and current control knobs but that wasn't possible either. It had to sit in the green rectangle as shown in the picture:Marking the location on the back of the front:After drilling:For these kind of jobs I use packaging tape to cover front plates so they won't get damaged during drilling.The end result is this:The load on/off switch also provides a nice opportunity to mease the switch-on and switch-off curves. I set the PSU to 24V and got these curves:The switch off-curve shows the down programmer (current sink) is actually a proper current sink. I guess this power supply isn't very suitable for fast modulation.
Function Generator on side - Page 1
Forum section: electronics / testgear

author: staze
author_rank: Frequent Contributor
timestamp: November 25, 2013, 08:05:02 am
content: All,Quick, hopefully simple question. I'm curious if there is any reason I couldn't keep/run my DDS function gen (TTi TG1000) on it's side. There are no vents/airflow holes, so that's not an issue... I'm mainly curious if there's any downside to an oscillator being oriented on it's side. Guessing no, but just thought I'd ask. =)P.S. You may think it's a silly question, but did you know mechanical watches will run at different speeds if kept at different angles (see Rolex documentation cited here:http://beckertime.com/blog/2012/is-your-rolex-running-slow-fast-or-both/)

author: jpb
author_rank: Super Contributor
timestamp: November 25, 2013, 01:15:09 pm
content: I wouldn't have thought it was a problem.Two things you might want to consider are:Are there any heavy components (transformers) that might put strain on their mounts? (Assuming its a switched-mode supply I wouldn't think the transformer is very heavy.)Thermal convection. Even if there are no vent holes in the side, it might be designed for hot air to rise and go out vents in the back and if you mount it on its side the warm air might collect somewhere else. Again, since this isn't a high power device except perhaps the output amplifier, it probably won't be a big issue.And of course all the electrons might fall out...

author: echen1024
author_rank: Super Contributor
timestamp: November 25, 2013, 03:33:33 pm
content: Quote from: jpb on November 25, 2013, 01:15:09 pm*gasp* Not the electrons falling out!

author: staze
author_rank: Frequent Contributor
timestamp: November 25, 2013, 03:38:23 pm
content: The transformer is a good point. The OEM said it isn't a problem, so I think I'm good, but thanks for the replies! Here's to making more room on my bench... To fill with more stuff!

author: eV1Te
author_rank: Regular Contributor
timestamp: November 25, 2013, 03:47:11 pm
content: You will get very small shift in frequency from the crystal oscillator if you orient it differently, but you can of course calibrate the oscillator in this orientation if you want to.The shift in frequency is probably only measurable if you compare it to a rubidium standard or such, so if you can live with a few ppb in difference on the side you will be fine

author: staze
author_rank: Frequent Contributor
timestamp: November 25, 2013, 04:21:02 pm
content: Okay, that's what I was looking for/thinking.Yeah, no Rb (or Cs) standard here, so no big deal.Thanks!
RIGOL Ultra Sigma crashes every time - Page 1
Forum section: electronics / testgear

author: cubitus
author_rank: Regular Contributor
timestamp: November 23, 2013, 08:30:03 am
content: Hello,Sorry for my english, but I'm French.I bought products RIGOL RIGOL. DM3068, DP832a, DG4062 ..I have installed "Ultra Sigma" 00.01.05.10 on a modern PC running Windows 7 pro SP1 64.I have it installed in administrator mode.Ultra Sigma runs with devices none connected.Ultra Sigma runs with connected devices, but crashes every time I try to do an action.I have installed the same thing on an old PC running Windows XP and it works well.I have tried to install other versions of Ultra Sigma 01/05/05 01.05.02. Its the same problem.I have tried to install Labview 2013Ultra Sigma ran two days and since it has crashed as before.I have uninstalled Labview2013Do you have any idea with the problem ?thank youregards

author: Maurizio
author_rank: Contributor
timestamp: November 25, 2013, 07:57:11 pm
content: I installed UltraSigma some days ago from Cdrom (arrived with my new Dg1032Z) on Win7. It runned, connected to my rig but no action anymore.Then downloaded the latest version from Rigol site, ver 00.01.05.10: started, connected and did some action.But after a reboot, do not start anymore. Tried to run in XP compatibility mode: no action.Itried to reinstall: installs, but not running.I'll try to deinstall it from control panel and reinstall. Perhaps...Any other idea?

author: GreyWoolfe
author_rank: Unknown
timestamp: November 25, 2013, 08:21:37 pm
content: If you both are running 64 bit Win7, that may be the problem. I would suggest installing a virtual machine. I use VMWare. Install WinXP SP3 32 bit in the virtual machine. Within the VM install the software and try it there. USB ports are recognized in the virtual machine.Tom, NW0LF

author: cubitus
author_rank: Regular Contributor
timestamp: November 25, 2013, 08:46:26 pm
content: It is very curious and capricious ...Today, the software runs, the "screen capture" runs.Yesterday, the software runs, but not the screen capture.Before yesterday, nothing runs ...I have not modified anything in my system.I'll try with viltualboxregards
old school Resistor Substitution box find + pictures - Page 1
Forum section: electronics / testgear

author: jwm
author_rank: Regular Contributor
timestamp: November 22, 2013, 10:26:41 pm
content: I bought these on ebay from someone who was selling a lot of "unknown untested sargent-welch equipment" for a deal. For some reason I thought I might be able to pull some precision resistors out of them. turns out the construction is more old school than I thought. Everything appears hand wound and soldered, no plastic other than the bakelite knobs, all fiberglass(maybe?) insulated wires. After a very liberal amount of deoxit/contactcleaner and a solder mend/wire replacement here and there they all work like a treat. Each knob has 5 elements in a 2,2,2,2,1 configuration, the switch contacts are all in triplicate and make maybe a good cm^2 of contact. Should I send one to dave for his substitution box collection?

author: ttp
author_rank: Regular Contributor
timestamp: November 24, 2013, 08:00:35 am
content: I like your Radio Shack analog meter. What model is it?
Venner Electronics Wide Range Oscillator - Adding a transformer? - Page 1
Forum section: electronics / testgear

author: AmmoJammo
author_rank: Frequent Contributor
timestamp: November 23, 2013, 12:34:16 am
content: I have this old signal generator that I use just for audio ranges....It originally ran off two 9volt batteries, but I wish to add a transformer.From memory, the last time I attempted this, I got 50Hz hum as a result.I've run it off an external 12volt plug pack before with no issues.Should I be grounding the case to mains earth? or leaving it floating?Anything else I should take into consideration before attempting to add a transformer, bridge rectifier, and filter capacitors again?Thanks! (the 10,000uf capacitor was added last time I tried adding a transformer)

author: edavid
author_rank: Super Contributor
timestamp: November 23, 2013, 05:24:22 am
content: That's really beautiful.You should try adding a simple regulator (LM317) to your power supply, that will reduce the 50Hz ripple a great deal.

author: AmmoJammo
author_rank: Frequent Contributor
timestamp: November 24, 2013, 10:36:37 pm
content: I ended up finding a transformer from an old radio... It was actually centre tapped, using the taps in parallel with a diode on each, in the radio.So, taps in series gave me about 13.6volts AC unloaded, resulting in 18volts DC once rectified, that dropped to 14volts with the load of the signal generator.Ah well, close enough and it didn't cost anything.However, this only seems to do 2volts rms output max... the 100mv range doesn't work, and the 10/1mv ranges both seem to output the same voltage.Square wave also isn't 50% duty cycle, its fooked a bit...BUT!As I mentioned, I only wanted this for testing audio, so squarewave doesn't matter, and I really only ever needed the 2.5volt range anyway.So, she'll be right!

author: Andy Watson
author_rank: Super Contributor
timestamp: November 24, 2013, 10:58:17 pm
content: This is essentially the same as the Marconi TF 2103,. You could do worse than plagiarise the power supply from the Marconi manual.
Hantek 1008c - Page 1
Forum section: electronics / testgear

author: artag
author_rank: Super Contributor
timestamp: November 24, 2013, 01:38:09 pm
content: Has anybody here looked at the Hantek 1008c USB scope ?I realise it's pretty limited compared with almost any other model, but with 8 12-bit channels it might make a useful USB datalogger or monitoring system.It would need some custom software though - maybe it would work with OpenHantek ?
Merry Christmas to Me - Page 1
Forum section: electronics / testgear

author: tony3d
author_rank: Frequent Contributor
timestamp: November 23, 2013, 05:04:46 pm
content: Ok, my wife told me she wants to get me a scope for Christmas. My limit is now $450.00. The ones I have in mind are the ........Owon SDS7102, Rigol DS1102E, and the Siglent SDS1102CML. I really like the large screen of the Owon, but have read to many negatives about the firmware. The Rigol looks really nice, but has such a small screen. How is the Siglent? Seems like a nice scope. Keep in mind this would be my first scope. Thanks.

author: chrisbrown
author_rank: Contributor
timestamp: November 23, 2013, 05:18:19 pm
content: IIRC, the Siglent has poor display resolution. Each displayed "pixel" is actually a group of 2x2 pixels so you only get one quarter the resolution.I was debating earlier between the Rigol and the Owon. Personally, I found the Hantek DSO5102B to be the best compromise between features, usability and screen size within the $400 price point. It's been doing the job for about a year now. Just something else for you to consider.

author: tony3d
author_rank: Frequent Contributor
timestamp: November 23, 2013, 06:34:40 pm
content: Thanks. I'll look into that model. The reason the screen size is important to me is , I will be working a lot with super caps, and thought the extra screen real estate would be good for watching the charge and discharge over time.my other main use would be for audio amplifier circuits.

author: notsob
author_rank: Frequent Contributor
timestamp: November 23, 2013, 10:16:33 pm
content: TheDS1104E is showing it's age, if you can stretch your budget a little bit more, go for the DS1074Zhttp://www.tequipment.net/RigolDS1074Z.html

author: tony3d
author_rank: Frequent Contributor
timestamp: November 23, 2013, 10:43:58 pm
content: Quote from: notsob on November 23, 2013, 10:16:33 pmReally can't go that high, and for my purpose I really wouldn't utilize the extra 2 channels.

author: Wytnucls
author_rank: Super Contributor
timestamp: November 23, 2013, 10:57:02 pm
content: For supercaps, wouldn't you be better off plotting long trends with a high res DMM and RS232 software?

author: echen1024
author_rank: Super Contributor
timestamp: November 24, 2013, 03:35:45 am
content: Quote from: tony3d on November 23, 2013, 10:43:58 pmYou can ALWAYS use 2 extra channels. I bought a 2 ch, thinking that I wouldn't need 4, but after using it for a few months, I discovered that I was alwys running out of channels.

author: strangelovemd12
author_rank: Regular Contributor
timestamp: November 24, 2013, 03:39:44 am
content: Quote from: echen1024 on November 24, 2013, 03:35:45 amUnfortunately you can't always increase your budget by 30%.

author: echen1024
author_rank: Super Contributor
timestamp: November 24, 2013, 03:41:57 am
content: That is the main problem.

author: tony3d
author_rank: Frequent Contributor
timestamp: November 24, 2013, 04:20:15 am
content: What about the Hantek DSO5102BM. How is this scope?

author: echen1024
author_rank: Super Contributor
timestamp: November 24, 2013, 04:22:44 am
content: A good compromise from what ive heard
Vision Engineering's Cam Z - Page 1
Forum section: electronics / testgear

author: London Lad
author_rank: Regular Contributor
timestamp: November 23, 2013, 06:57:19 pm
content: Has anyone used one of these ?http://www.visioneng.com/products/digital-inspection/camz-handheld-digital-magnifier

author: AndersAnd
author_rank: Frequent Contributor
timestamp: November 23, 2013, 07:05:34 pm
content: Corrupted link in your post. Yo might want to edit it tohttp://www.visioneng.com/products/digital-inspection/camz-handheld-digital-magnifier

author: London Lad
author_rank: Regular Contributor
timestamp: November 23, 2013, 07:10:51 pm
content: Quote from: AndersAnd on November 23, 2013, 07:05:34 pmThanks

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: November 24, 2013, 10:46:14 pm
content: Login to see user manual - failAppears to be handheld only, no stand - failList price $900 - seriously? are they taking the piss?

author: London Lad
author_rank: Regular Contributor
timestamp: November 25, 2013, 08:35:32 am
content: Mike, slightly off topic but did I see you were using a vision engineering mantis objective lens as a hand held magnifier in one of your videos? I think it was the 'how to build a lab' one.