hybridfree/eevblog-posts huggingface dataset:
Agilent U1253B user defined power-on melody or power-on greeting ? - Page 1
Forum section: electronics / testgear

author: usagi
author_rank: Frequent Contributor
timestamp: March 18, 2017, 10:28:13 am
content: On page 107 of the agilent U1253B user's manual it describes "user" settings for power-on melody and power-on greeting as "factory reserved".Has anyone figured out if these settings are hackable? I'd love to have custom power-on tunes and image
DMM recommendation - Page 1
Forum section: electronics / testgear

author: grouchobyte
author_rank: Regular Contributor
timestamp: March 18, 2017, 04:14:48 am
content: I have about 5 pretty decent DMMs yet on my current consulting project that is not really enough. I have mostly Fluke 87 IV and 87Vs and a couple of older Flukes. Money is really no object but durability, reliability and decent peformance with an easy to use feature set is key ( no retarded GUI). I hate junk......and no I will not consider the EEVBlog branded meter or some other rebagged product.....sorry Dave!I have an Agilent 1733 LCR meter and that beast is a good example of a retarded GUI. I hate using that blasted thing. I much prefer my smart tweezersI am thinking of just jumping on Amazon and buying another Fluke 87 V. Is that really the best DMM out there in its class today or is there a good reason to consider something else? I dont need killer benchtop performance because that is what my Tek, Agilent and RS gear are for.Thanks@grouchobyte

author: Lightages
author_rank: Unknown
timestamp: March 18, 2017, 04:33:12 am
content: Quote from: grouchobyte on March 18, 2017, 04:14:48 amQuote from: grouchobyte on March 18, 2017, 04:14:48 am

author: grouchobyte
author_rank: Regular Contributor
timestamp: March 18, 2017, 04:57:38 am
content: CORRECTION (OP has been edited for clarity)Okay. Let me be clear. When I say killer performance I mean >6 1/2 digits, 0.0002 % accuracy, and drift in PPB....you know, the kind of features you find in a >$1k bench DMMIn a DMM I would like a nice set of features like capacitance, conductance, peak hold, diode measurement temperature, good clear display, backlight, low burden voltage, etc.Something equivilent or competitive to a FLUKE 87 IV or V is what I seek@grouchobyte

author: Jon.C
author_rank: Unknown
timestamp: March 18, 2017, 06:12:37 am
content: Brymen 869s

author: Wytnucls
author_rank: Super Contributor
timestamp: March 18, 2017, 06:13:55 am
content: If money is no object, have a look at the Chauvin Arnoux MTX3293 or the Gossen Extra M248A.

author: Fungus
author_rank: Super Contributor
timestamp: March 18, 2017, 07:31:35 am
content: Quote from: grouchobyte on March 18, 2017, 04:57:38 amTake a look at the Gossen range if you want to spend some money:https://www.gossenmetrawatt.com/english/ugruppe/multimeters.htm
Digilent Digital Discovery - New Tool - Page 1
Forum section: electronics / testgear

author: rstofer
author_rank: Super Contributor
timestamp: March 17, 2017, 07:41:57 pm
content: The Digilent Analog Discovery has been around for quite a while. Now they have introduced a similar module called the Digital Discovery. It's on order so we'll see...http://store.digilentinc.com/digital-discovery-portable-logic-analyzer-and-digital-pattern-generator/

author: PA0PBZ
author_rank: Super Contributor
timestamp: March 17, 2017, 07:56:44 pm
content: And the high speed adapter is only $49.99... Seriously?

author: rstofer
author_rank: Super Contributor
timestamp: March 17, 2017, 08:02:49 pm
content: Quote from: PA0PBZ on March 17, 2017, 07:56:44 pmTrue, but it's free to the first 100 buyers of the DD.I thought the price seemed high as well. It does include the twisted pair leads but still...

author: bitseeker
author_rank: Super Contributor
timestamp: March 17, 2017, 08:20:03 pm
content: Retail twisted-pair ribbon cables are rather pricey. Definitely worth it to DIY.Edit: When they said twisted pair, I thought they were using a twisted-pair ribbon from the DDD to the adapter. Nope. The adapter goes directly on the DDD and individual twisted pairs go from the adapter to the DUT. So, no fancy cables needed. Just twist your own leads/jumper wires and slap in a terminating resistor.https://reference.digilentinc.com/_media/reference/instrumentation/digital-discovery/250-104_dp_2.54_3.pdf

author: Neganur
author_rank: Unknown
timestamp: March 17, 2017, 08:48:06 pm
content: Ah great, I've been waiting for this one to be ready for sale. Specs look pretty good and if the software is similarly good as the waveforms API (with python) it should be fairly useful.

author: Carrington
author_rank: Super Contributor
timestamp: March 17, 2017, 09:09:29 pm
content: I like it very much, a very useful tool, no doubt.
Fluke 8840/8842 A/C option cards - Page 1
Forum section: electronics / testgear

author: xwarp
author_rank: Frequent Contributor
timestamp: March 21, 2017, 11:53:29 am
content: For those that have these Fluke 8840's and 8842's that do not have the A/C option, but are looking to get one, the following applies:There are A/C option cards out there that will work with BOTH 8840 and 8842. They are marked "884X". NOTE THE "X".On this card, you will see that there are two positions in which the resistors R836 and R837 can be positioned.The upper position is for use in the 8842. The lower position for the 8840. The middle pad is used in both.
Tektronix 212 fit on a 200c cart? - Page 1
Forum section: electronics / testgear

author: eugenenine
author_rank: Frequent Contributor
timestamp: March 17, 2017, 01:55:03 am
content: A Tek 200c cart turned up on Criagslist locally. I have a 2211 scope which says it goes on a K212 cart. The seller says the 200c is 12.5" wide and my scope looks like its about 13" I' hoping maybe our rough measuring will give enough leeway that it will fit but wondered if anyone else had any of these old carts that could double check.Other option I suppose is I could take my scope and try it.
Hard Case for Siglient 3021 - Page 1
Forum section: electronics / testgear

author: Kitt
author_rank: Newbie
timestamp: March 15, 2017, 05:16:19 pm
content: Good afternoon everyone - If this is not in the correct forum please move it accordingly. I have searched and can't seem to find any information on this. I am trying to determine if anyone has any recommendations for a hard-case that can be purchased for the Siglient 3021 Spectrum Analyzer. I move around alot and want to put this piece of equipment in, something that will protect while on the go. Does anyone have any recommendations or pictures of what they use? Thanks ahead of time.

author: tautech
author_rank: Super Contributor
timestamp: March 15, 2017, 07:49:13 pm
content: Quote from: Kitt on March 15, 2017, 05:16:19 pmI've got one Siglent's padded carry cases due in my next order later this week or early next. It fits a # of their products including the SSA3kX models. I'm getting it for my SDS2304X DSO but I will try the 3032X in it and report back. Other padded cases I've had from them were nicely constructed and offered good protection for traveling.http://siglentamerica.com/prodcut-fjxx.aspx?fjid=1314&id=1488&tid=1&T=2This one's not very cheap, my price was getting on towards $100 so they'll retail a bit over $100.Anyways, I'll come back with some report and maybe some pics if I think it's a good option for you and others.

author: Kitt
author_rank: Newbie
timestamp: March 17, 2017, 12:33:43 am
content: Quote from: tautech on March 15, 2017, 07:49:13 pmThanks for the link. I am going to see if I can get a pelican case with some of the foam. Just got to measure and then look at what might work. Would have been nice to have at least a cover to go over the screen.Sent from my SM-T357T using Tapatalk
HP 85901A AC Power Supply - Page 1
Forum section: electronics / testgear

author: cncjerry
author_rank: Unknown
timestamp: March 16, 2017, 09:32:58 pm
content: Anyone familiar with the HP 85901A AC power source? I know they have a battery and can provide up to 200W for a period of time to the 859X series of analyzers. I also see they have connectors on the back for what looks like other wiring options. I am wondering if the power is cleaner than typical AC mains and if it would be worth while to have one for low-noise measurements using a spectrum analyzer. Most of the applications shown are using an analyzer in the fields. Basically a boat anchor sized battery to go along with your boat anchor. Since I have a lot of boat anchors I was thinking of making one luggable, unless the power+noise coming out of them is really low. But then again, most of my noise comes from broadcast band FM.There's a guy locally that has one with a new battery for a good price.Thanks
HP355a spectrum analyser for $200? - Page 1
Forum section: electronics / testgear

author: joseph nicholas
author_rank: Frequent Contributor
timestamp: March 16, 2017, 08:38:41 pm
content: A local seller is offering this with a pick up at his home. The display is non working, but the modules all power up.Does anyone think buying this for use with a Tek 465 oscilloscope is a good idea for the hobbiest?Thanks.

author: cncjerry
author_rank: Unknown
timestamp: March 16, 2017, 09:02:26 pm
content: I think you have the HP product number wrong.

author: joseph nicholas
author_rank: Frequent Contributor
timestamp: March 16, 2017, 09:54:18 pm
content: Ah, yes I left out a 5.
It is safe to use the TG output of the SA without a 50R load? - Page 1
Forum section: electronics / testgear

author: mcinque
author_rank: Unknown
timestamp: March 15, 2017, 10:53:13 pm
content: I'm not an expert of SA other than EMC testing use. So I thought it's better to ask.I need to find the resonant frequency of a metal shielded box which is not perfectly square (it has many elements inside that modify the inner geometry). Since that I cannot simply do math to find that frequency.It is safe to use the TG connected by a bnc<|>bnc to a small wire as antenna inside the box near another bnc<|>bnc conneced to the SA input?The idea is to sweep the frequency with the TG to see the resonant one,like this.Would the TG output require a 50R load? And can it be damaged from reflections/SWR?

author: TheSteve
author_rank: Unknown
timestamp: March 15, 2017, 11:53:05 pm
content: There should be no damage with no 50 ohm load - it never hurts to consult the manual for whichever model you happen to have though.

author: David Hess
author_rank: Super Contributor
timestamp: March 16, 2017, 03:03:09 am
content: The tracking generator output is not going to be damaged by operation into a short, open, or any length of cable with or without a passive load on the end. The power levels are too small.If you are concerned, then put a 50 ohm attenuating pad (3dB, 6dB, 10dB, whatever) between the tracking generator output and the load which will attenuate any reflected signal.

author: mcinque
author_rank: Unknown
timestamp: March 16, 2017, 12:29:00 pm
content: Quote from: TheSteve on March 15, 2017, 11:53:05 pmThank you for your reply.Yes, indeed. Unfortunately in the manual there is no advice or warning (at least I didn't find it!) about TG output without a load, so I asked hereQuote from: David Hess on March 16, 2017, 03:03:09 amGood advice, thank you!
SDG5082,SDG5112,SDG5122 convert to SDG5162 - Page 1
Forum section: electronics / testgear

author: obi100
author_rank: Newbie
timestamp: March 14, 2017, 08:01:25 pm
content: Has anyone a firmware jtag flash dump from SDG5162Or an older firmware update as SDG5000 V500R001B01D01P10R1Would be great if that were so.First, a few small numbersModify the Serial with: 258528 saved OKModify the Modell with: 369639 saved NO (POWER OFF and ON the Modell is not on Flash saved)Reset startup time with: 123321 saved OK (POWER OFF and ON the startup time is 000 )display developer with: 159264Best regartsobi100

author: tautech
author_rank: Super Contributor
timestamp: March 14, 2017, 11:54:22 pm
content: Welcome to the forum.The oldest version on Siglent websites is 5.01.01.10http://siglentamerica.com/gjjrj-xq.aspx?id=819&tid=15Good luck with your endeavours.

author: obi100
author_rank: Newbie
timestamp: March 15, 2017, 12:03:41 am
content: I have unfortunately alreadyBut there is version 5.01.01.07R1Who still has this version?

author: tautech
author_rank: Super Contributor
timestamp: March 15, 2017, 12:21:14 am
content: Quote from: obi100 on March 15, 2017, 12:03:41 amNobody I know.FW has only been on websites for a short time.

author: janekivi
author_rank: Frequent Contributor
timestamp: March 15, 2017, 08:45:05 pm
content: Quote from: obi100 on March 15, 2017, 12:03:41 amThis was there maybe from factory and here is no downloadable firmware file...https://www.eevblog.com/forum/testgear/tests-siglent-sdg5082-waveform-generator/msg239358/#msg239358...« on: May 30, 2013, 03:20:45 PM »...SDG5082 0213 manufacture, FW:5.01.01.07R1...But inside latest firmware is FPGA part and (Blackfin ?) program file where from address 0000DBD4 is compressed part.Unpacked_SDG5000-V500R001B01D01P15R1.zip

author: obi100
author_rank: Newbie
timestamp: March 16, 2017, 07:12:37 am
content: i have the full flash dump from SDG5082 but the licence to convert to SDG5162 is the problem.this is mach in Flash dump at 0X0013FEFD 020084001000is this the way?UPDATE: So, that string does not appear to be in the dump file anywhere... The file is exactly 128MB in size, and appears to contain lots of identifiable strings including my serial number and the entire contents of the HTML help system.It doesn't make sense that it would be a "corrupted" dump if I'm seeing real, readable data, but I guess I'm not sure what I'm supposed to see. Is there a different way to try the dump? I ended up switching to the WinUSB driver and using the bfin-gdbproxy and bfin-elf-gdb approach.Quote from: PeDre on August 17, 2014, 05:29:17 AMCan you find the hex pattern "020084001000" in your dump file, as in the rigup utils.c file?KeyData* ScanKeys(const void *data, size_t datasize){/*Offset Data0 02 00 84 00 10 006 <16 bytes of XXTEAKey>22 20 0024 <16 bytes of RC5Key1>40 <16 bytes of RC5Key2>56 08 0058 <8 bytes of bit-shuffled ECC public key>66 40 0068 <64 bytes of some ASCII-HEX data>132 <END>*/I used rigup 0.4: "rigup ds2072a ds2k_00_sdram.bin"Peter« Last Edit: August 17, 2014, 05:40:56 AM by Slappy_g »
Soar 5700 LCR Meter Good for 30usd? - Page 1
Forum section: electronics / testgear

author: joseph nicholas
author_rank: Frequent Contributor
timestamp: March 15, 2017, 01:04:44 pm
content: Hi, I saw this on a local market site and was wondering if its a quality device for testing capacitors?ThanksPS I can't find any information or psd on google.
EEVBlog branded Oscilloscope ? - Page 1
Forum section: electronics / testgear

author: ErikTheNorwegian
author_rank: Frequent Contributor
timestamp: March 17, 2017, 11:08:29 pm
content: What?

author: TheSteve
author_rank: Unknown
timestamp: March 17, 2017, 11:19:15 pm
content: That was a special front panel overlay Keysight made for Dave last year(for scope month I do believe). He gave away a few scopes like that and kept at least one.

author: gslick
author_rank: Frequent Contributor
timestamp: March 17, 2017, 11:22:05 pm
content: Keysight can supply standard localized language overlay sheets (something like 15 different language options) for the button and knob section which are held in place by tabs inserted into 4 notches in that section.Apparently Keysight just made some custom overlay sheets for Dave.
So after watching 979 Hacking the 1000x, I created a Google Sheets doc w/results - Page 1
Forum section: electronics / testgear

author: extide
author_rank: Regular Contributor
timestamp: March 13, 2017, 08:52:03 pm
content: Here it is:https://docs.google.com/spreadsheets/d/1V_SeHGGtYrBMRvJX85_mR7LVXFcIo6Z23qLtHwaGsfs/edit?usp=sharingIt's public please be respectful and responsible. The idea behind this is that everyone trying to hack this thing can all collaborate and share data easily.
R&S RTH1000 Oscilloscope Front Panel Responsiveness and Touchscreen  - Page 1
Forum section: electronics / testgear

author: Rich@RohdeScopesUSA
author_rank: Frequent Contributor
timestamp: March 13, 2017, 05:23:06 pm
content: Hi Folks,User @radar_macgyver (cool username btw) asked in another thread:Quote from: radar_macgyverI put together a quick video in my (messy) home office showing how the touchscreen handles water along with how you can drive the scope without using the touchscreen. Hope this helps!https://youtu.be/5aCww0YGJUs-Rich

author: radar_macgyver
author_rank: Frequent Contributor
timestamp: March 14, 2017, 03:50:37 am
content: Thanks, Rich, that was most informative. It's good to know that many of the 'traditional' scope functions that are normally done with knobs can be done with the touch screen, this would come in very handy when we're hanging 50 feet up in a towerI normally much prefer knobs to buttons, but the touch screen eases the transition.The video convinced me, I'm going to recommend we get one of these for our lab. Thanks!
ET201 $60 digital scope multimeter - Page 1
Forum section: electronics / testgear

author: aquaaddict
author_rank: Contributor
timestamp: March 09, 2017, 12:12:32 am
content: Hi,Anyone yet tried thehttp://www.banggood.com/EONE-ET201-2-in-1-Digital-Intelligent-Handheld-Storage-Oscilloscope-Multimeter-p-1101844.html?utm_design=41&utm_source=emarsys&utm_medium=Mail_mailad279_dealalert&utm_campaign=newsletter-emarsys&utm_content=Claire&sc_src=email_2269481&sc_eh=7f83199c815392241&sc_llid=510189&sc_lid=92746810&sc_uid=cnSjZVj3MWET201 chinese digital scope / multimeter for $50 delivered?The specs are pretty ordinary at best:Analog Bandwidth: DC AC ~ 10kHzThe maximum real-time sampling rate: 200kspsDC voltage: 200.0mV ~ 1000V ± (0.75% rdg + 10dgt)AC voltage: 200.0mV ~ 750V ± (1.0% rdg + 10dgt)DC Current: 2mA ~ 20.00A ± (1.2% rdg + 10dgt)AC current: 2mA ~ 20.00A ± (1.5% rdg + 10dgt)Resistance: 200.0? ~ 20.00M? ± (1.0% rdg + 5dgt)Capacitance: 20.00nF ~ 200.0?F ± (2% rdg + 10dgt)Frequency: 2KHz ~ 200KHz ± (1.0% rdg + 5dgt),Diode test: open circuit voltage of about 1.5 V, the maximum test current of about 1.5mA.Continuity Test: determine resistance: about 100?Remote control Detection: 38kHz carrier frequencyTransistor Magnification: 30 ~ 1000 (annex)Fuse rating: ?5 × 20A, 250mA / 250V20A instead of the usual 10A range is a nice improvement, clearly 10KHz bandwidth is of limited use and some of the accuracy specs are a little lower than an equivelent priced UniT, but I cant help bu think it could be useful.Would love to see Dave review it!Anthony

author: daybyter
author_rank: Frequent Contributor
timestamp: March 09, 2017, 03:58:05 am
content: Found a video:

author: aquaaddict
author_rank: Contributor
timestamp: March 13, 2017, 09:51:04 am
content: Hmm doesn't look too great does it...Sent from my ZTE A2017G using Tapatalk

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: March 13, 2017, 10:03:10 am
content: Manual ranging - how quaint

author: daybyter
author_rank: Frequent Contributor
timestamp: March 13, 2017, 10:45:32 pm
content: The 50 MHz Version looks better, but it seems it is no longer produced?https://www.eevblog.com/forum/testgear/et-310-scopemeter/http://www.ebay.com/itm/ET310A-Handheld-Oscilloscope-Scopemeter-Digital-Multimeter-10MHz-50MSa-s-/311740556824?hash=item48952f6618:g:pRUAAOSwXeJYKSfh
Replacement Agilent/Keysight MSO Cables - Page 1
Forum section: electronics / testgear

author: rheb1026
author_rank: Regular Contributor
timestamp: March 13, 2017, 07:01:16 pm
content: I'm looking for a replacement MSO cable for an Agilent/Keysight MSO-3000X. Keysight want $775 for one and I don't use the cable enough to justify paying that. There seem to be some older Agilent 54620 logic cables on ebay for under $200. Does anyone know if these will work? Or is there another alternative that isn't as expensive?

author: TheSteve
author_rank: Unknown
timestamp: March 13, 2017, 07:19:26 pm
content: Yes those cables should be just fine.Here are some part #'s to look for:54620-61601 is the main cable without clip leads54620-68701 - original part # for the entire logic probe kit (HP branded I believe)N6450-60001 - new part # for the entire logic probe kit (Agilent branded)N2756A / N2756-60001 - updated logic probe cable (Agilent/Keysight branded)

author: rheb1026
author_rank: Regular Contributor
timestamp: March 13, 2017, 07:26:04 pm
content: Thanks very much for the info, I appreciate it
When is a short useful in a double banana plug? - Page 1
Forum section: electronics / testgear

author: RobShaver
author_rank: Newbie
timestamp: March 12, 2017, 09:35:59 pm
content: I'm trying to build up my electronics bench and want to buy some quality test leads, jumpers and such. I was looking at Pomona and came across this:Model MDP-S Double Banana Plug With Shorting BarHere's a link to the data sheet:http://www.farnell.com/datasheets/59727.pdf?_ga=1.17505265.937356043.1487961836The part I don't understand is why you would want a short across the two plugs? I came across them on eBay and Newark for a reasonable price, but I don't want the shorted ones.

author: timb
author_rank: Super Contributor
timestamp: March 12, 2017, 09:42:49 pm
content: Quote from: RobShaver on March 12, 2017, 09:35:59 pmThey're used for testing multimeters (zeroing them out during calibration, etc.). Why? Some DMMs have very high impedance, which means the input can show a voltage with nothing connected (essentially static and RF slowly charge the input capacitance). A shorting bar zeros the meter out directly at the input.They're also sometimes used to load test power supplies in CC mode.

author: Paul Moir
author_rank: Frequent Contributor
timestamp: March 12, 2017, 09:44:51 pm
content: Notice the ground marker? It's for jumping the - and GND outputs on a lab power supply.EDIT: timb's got some very good uses too. I suppose it would be especially handy if you have a PSU where you have to short it out to set the CC mode too.

author: iainwhite
author_rank: Unknown
timestamp: March 12, 2017, 10:03:08 pm
content: Here is another example where the supply and sense outlets on a power supply are shorted together

author: eliocor
author_rank: Unknown
timestamp: March 13, 2017, 02:13:38 am
content: any suggestion on where (eBay/Aliexpress/...) to buy such shorting bars like the ones mounted on the power supply?Maybe my googlefu is a bit rusty, but I was not able to find them

author: alm
author_rank: Super Contributor
timestamp: March 13, 2017, 08:11:32 pm
content: Try Pomona 4115 (shorting link). Available atDigikey. Unfortunately, at $3, they are pretty expensive for such a small piece of nickel-plated brass.

author: eliocor
author_rank: Unknown
timestamp: March 13, 2017, 08:50:52 pm
content: Found them at a reasonable price 3$/10pcs:http://www.electronicsurplus.com/checkout/cart/configure/id/161066Unluckily only 32.50$ of shipping expenses to Italy!!!Let's continue the search...EDIT: I discovered the Pomona ones (Digikey) are 10 pieces for 3$. The price is not so steep.Thanks for the suggestion!

author: LaurentR
author_rank: Frequent Contributor
timestamp: March 14, 2017, 12:58:34 am
content: None on this cheap Pomona stuff, upgrade to the real thing!http://www.keysight.com/en/pd-1108290-pn-34172B/calibration-short-for-the-34401a-34410a-34411a-l4411a-digital-multimeter?cc=US&lc=eng$200 from Keysightor, for the budget-minded (and those who need only 4 jacks shorted):http://eu.flukecal.com/products/accessories/test-leads-probes-and-clips/884x-shortOnly $30 from Fluke...
Agilent 54622A LCD conversion? - Page 1
Forum section: electronics / testgear

author: KSP
author_rank: Regular Contributor
timestamp: March 13, 2017, 11:44:07 am
content: Hi all,I've acquired a couple of Agilent 54622A scopes, and although the green CRTs are perfectly functional, I simply do not like them. Is there an upgrade kit available for a colour LCD? Baring in mind I got these for free, I can spare a few pennies on upgrading them, or indeed selling one to raise money for upgrading the otherCan anyone point me towards something similar?Cheers

author: voltsandjolts
author_rank: Unknown
timestamp: March 13, 2017, 12:02:42 pm
content: Easiest method:2 x 54622A ---> Sale ---> Cash ---> Purchase LCD Scope
Rigol MSO1000Z series parallel decoding: What are Bit X and CH? - Page 1
Forum section: electronics / testgear

author: davemisbehave
author_rank: Unknown
timestamp: March 12, 2017, 10:10:36 pm
content: Hi,I'm playing around with my Rigol MSO1104Z-S's parallel decoding function and there are two settings I do not understand. I've looked at the built in "Help" (pictures attached), but I simply don't get it. Would someone please be so kind as to explain to me what the following two settings are for:Bit X ("The operating bit in bus")CH ("Config the bit channel associated with the bus on board.")Greetings from Hamburg, Germany

author: technogeeky
author_rank: Frequent Contributor
timestamp: March 13, 2017, 12:55:12 am
content: TheUser's Manualmight be of more help here (but I checked, it isn't much more information).I think for parallel decoding, you basically have to specify a 1-to-1 relationship between a bit (which is a HIGH or LOW signal on a single pin) and a channel.So if you have a parallel channel with a 1 byte word (e.g. 8 bits) then you would need to map bits like so:Pin 1 - Bit 0 - LA Channel 0Pin 2 - Bit 1 - LA Channel 1...Pin 8 - Bit 7 - LA Channel 7Then, the scope could decode those 8 pins into one byte, and display that data.
Klein AC Clamp Meter Inside - Page 1
Forum section: electronics / testgear

author: wn1fju
author_rank: Frequent Contributor
timestamp: March 11, 2017, 06:09:16 pm
content: Everyone likes to peek inside. Here is an old Klein CL200 AC clamp meter plus DMM. The clamp will do up to 600A and the DMM doesVAC, VDC, ohms, continuity, diode, capacitance, and temperature (with a type-K thermocouple). Although the Chinese say it is Cat-III andup to 600V, one look at the insides was enough to convince me that I would be crazy to try it. Because the DMM doesn't do amps, Iguess they figured they needed virtually no input protection, fuses, isolation, etc.A curious blend of surface mount, chip "blob," a couple of through-hole transistors and a whole bunch of pots.The seller was offering 12 of these, all broken, for $25 shipped. Much to my surprise, they all came with fairly fresh batteries. I managedto resurrect 9 of the 12. Should make great paperweights or doorstoppers.

author: retiredcaps
author_rank: Super Contributor
timestamp: March 11, 2017, 07:05:41 pm
content: Quote from: wn1fju on March 11, 2017, 06:09:16 pmThanks for sharing the pics. I'm curious how you fixed the 9?

author: wn1fju
author_rank: Frequent Contributor
timestamp: March 11, 2017, 09:13:10 pm
content: Most of the fixes were simple things: 1) broken wires, 2) faulty piezo-buzzers, 3) dirty/missing switch contacts, 4) clamp springs and 5) burnedout LEDs. Without any schematic and without any patience to reverse engineer anything, the only "electrical" fix was a malfunctioning ohms(the meter showed a short with open leads) and I found a shorted transistor fairly easily. Three units served as parts sources for the remainingnine.
NI VirtualBench - now 500 MHz / 2GSa, 4ch, 40 MHz fgen (with arb cap.) - Page 1
Forum section: electronics / testgear

author: Neganur
author_rank: Unknown
timestamp: March 11, 2017, 12:42:31 pm
content: Seems there is a new model in the VirtualBench series: the VB-8054Spec upgrades I've identified:BW to 500 MHz (up from 350 MHz)2 GSa/s (up from 1.5 GSa/s)40 MHz arb gen (up from 20 MHz)edit: actually, the arbgen can only do 40 MHz sine, 5 MHz square from what I read.Official price: 8280 EUR excl. VAT (can't find it in their web shop yet but datatec.de sells it)Product flyer:http://www.ni.com/pdf/product-flyers/virtualbench-all-in-one-instrument.pdfI can't find any documents that states the memory length of the scope but the 350 MHz version had "1 MS/ch", and since NI doesn't advertise the length I guess it's the same.350 MHZ specification PDF:http://www.ni.com/pdf/manuals/374819a.pdf
HP 3325B Error 800 - Page 1
Forum section: electronics / testgear

author: gahamb
author_rank: Newbie
timestamp: March 14, 2017, 04:35:51 am
content: Hi all,Newby here. I have just purchased off eBay a HP 3325B with option 001 and 002 for a great price. The unit was cheap because it shows "Error 800" on the front panel. The operators guide gives the description for this error as "A remote HP-IB or RS-232 command has a syntax error". This is a bit strange since the pictures of the unit show no connections to the RS-232 and HP-IB interfaces.Since I'm still waiting for the unit to arrive, I haven't been able to do any basic troubleshooting such as checking loose connections or PSU voltages etc. The reason for this post is to ask the group here whether anyone else has experienced this sort of error or if anyone can give me a heads up with what might be the problem (obviously, the first point of call would be the HP-IB i/f board).A related question is what software is recommended for controlling the 3325 via the RS-232 i/f? Preferably an OSS solution rather than licensed s/w.Thanks in advance for any help.GrahamP.S. I've also posted this question in the Yahoo HP forum as well.
Rigol DS1000B - Is this a new model ? - Page 1
Forum section: electronics / testgear

author: snoopy
author_rank: Frequent Contributor
timestamp: March 11, 2017, 03:34:09 am
content: I was looking for something else and came across this. Never seen this before.http://int.rigol.com/Product/Index/5Datasheet herehttp://int.rigol.com/File/TechDoc/20160829/DS1000B_DataSheet_EN.pdf

author: MrBungle
author_rank: Unknown
timestamp: March 11, 2017, 04:03:40 am
content: Been around a fair while, they were 'old' news in 2012....https://www.eevblog.com/forum/testgear/new-rigol-ds1000b-series!/Edit: link seems to get fubar'ed by the '!/' at the end.... copy paste it instead, or add the !/ manually if you follow the link

author: snoopy
author_rank: Frequent Contributor
timestamp: March 11, 2017, 06:18:32 am
content: Quote from: MrBungle on March 11, 2017, 04:03:40 amSorry, I thought I had a scoop for a minute and then read the specs about the small memory depth and screen resolutionBut what stood out was the equivalent time sampling rate of 50Gs/s which is something you don't often see on a low end scope. Somone else got carried away toohttps://www.eevblog.com/forum/testgear/new-rigol-ds1000b-series!/msg982324/#msg982324cheers
Anritsu MS462xB VNAs? - Page 1
Forum section: electronics / testgear

author: bson
author_rank: Unknown
timestamp: March 10, 2017, 11:30:08 pm
content: I searched but couldn't find any discussion about the 3,6,9GHz models of the MS462xB VNAs. Mainly interested in the 2-port bidirectional B models, although I suppose a 4-port dual D model would be pretty cool. But I wouldn't pay extra for it, and they don't seem common anyway so not the same market glut. Prices look pretty good. Some of the optional features are neat and useful (internal autocal, NF measurement, IMD). Form factor is comparable to the HP 8753D/E units found similarly priced. They can read calibration data off a floppy or have it managed over GPIB, and seems easy to manage (unlike the 8753's), which makes it easy to use with say a Kirby cal kit. I'd mainly be interested in a 6GHz unit (MS4624B). both the operating and programming manual scan be downloaded as a PDF (in fact I read through the op man, and found the section on calibration interesting and quite comprehensive) off the Anritsu USA site. The Kirby kit comes with a load for checking calibration.It all looks pretty good to me... Any cons I'm missing here?
Hantek IDSO1070A  70MHz - Page 1
Forum section: electronics / testgear

author: haggy38
author_rank: Contributor
timestamp: March 09, 2017, 09:35:47 pm
content: Hi guys,Anyone had the chance to try this new wifi oscilloscope from Hantek?iPhone/iPad/Android/Windows Oscilloscope, Multi-touch Operation.WIFI Communication (USB Communication), WIFI Direct Connection/ Router Connection.Build-in Lithium Battery with 4 hours endurance, no need of External Power. Floating Measurement is available, safe and convenient.70MHz Bandwidth, Real-time Sampling Rate 250MSa/sCan be connected with iPad and iPhone at the same time. When operating on iPad, it can also be observed on iPhone.Good mechanical design. The outer case is made by the same material with iPad - Anodised aluminium. It has great heat resistance and abrasive resistance with beautiful appearance. The hardness of aluminium alloy surface is greatly improvedSmall size which is convenient for traveling.Software Support:IOS,Android(Unpublished),Win10,Win8, Win7, Windows NT ,VISTA, etc.More than 20 kinds of automatic measurement function, PASS/FAIL Check function, fit for engineering application.FFT spectrum analyzerWaveform averaging, afterglow, lightness control, reverse, add, subtract, multiply, divide, X-Y display.The waveform data can be output as EXCEL, BMP, JPG according to time and voltage.

author: haggy38
author_rank: Contributor
timestamp: March 10, 2017, 10:45:15 pm
content: No one??
Rigol 3000 Series Bench Multimeter Dimensions -- minus the bumpers - Page 1
Forum section: electronics / testgear

author: bermanmk
author_rank: Newbie
timestamp: March 10, 2017, 09:54:51 pm
content: I'm looking to replace the crappy bench multimeter in my rackmount setup. Since I really don't feel like rebuilding the thing I am trying to find one that will fit in the old one's footprint.I'd really appreciate it if someone who owns a rigol 3000 series could measure the dimensions of theirs, minus the grey corner bumpers. You don't have to remove the bumpers, just measure on the front or back case in the spot where the bumper doesn't overlap. I need the height and width info -- I assume that the depth is unaffected.Also, if anyone knows if the bumpers (and the handle) are easy to remove I'd appreciate info on that too.Thanks,--Mark

author: 2N3055
author_rank: Super Contributor
timestamp: March 10, 2017, 10:15:22 pm
content: You cannot remove front rubber from front panel.. That is a front panel.You can remove rear one, with two screws.. Original rackmount kit is made so you mount DMM with all the rubbers still on..

author: Dino KL0S
author_rank: Contributor
timestamp: March 10, 2017, 10:25:12 pm
content: My DM3068 measures 8 7/8" wide and 3 1/2" tall not counting the bumpers; you actually can remove the four rubber bumpers on the front panel as they simply pull off, BUT having said that the plastic nipples that the bumpers snap onto are part of the case and you'd have to grind them off if you wanted a smooth surface with those dimensions. With the bumpers on it measures 9 1/8" wide and 4 1/4" tall.

author: 2N3055
author_rank: Super Contributor
timestamp: March 10, 2017, 10:34:47 pm
content: Thanks Dino, I was quoting service manual.. My DM is new so didn't want to try prying things off...
Is there a means to Request a Review from Dave Jones? - Page 1
Forum section: electronics / testgear

author: MrCreosote
author_rank: Contributor
timestamp: March 10, 2017, 07:33:31 pm
content: I suspect it might be on Twitter... (unfortunately, while PC adept, I hate Facebook and Twitter UI's.)

author: Jeroen3
author_rank: Super Contributor
timestamp: March 10, 2017, 08:57:36 pm
content: You're in luck, its on the regular webpage:https://www.eevblog.com/reviews/. No social media bs.You can also ship the product tomailbag, put out an email and hope for the best?
[SOLVED] BM235 backlight issue pressing around HOLD button (NOT the noise issue) - Page 1
Forum section: electronics / testgear

author: Gywhard
author_rank: Newbie
timestamp: March 09, 2017, 02:11:59 pm
content: Hello everyone, this is my first post in this forum.My name is Andrea, i come from Italy. I'm a Physics student, electronics enthusiast, and ham radio operator.I just got today the sweet little Brymen BM235, EEVBlog edition of course!The meter seems to work like a treat, except for this little quirk I found:Since a picture is worth a thousand words, I figured a video would be even better.It's 21s long:https://youtu.be/Z6IF9wOUrw0I noticed it by accident while testing the Delta function. Basically if I press on the plastic enclosure around the HOLD button area it can make the backlight go awayHas anyone got any guesses what the issue might be? Could it be some sort of connection problem? Could it be the LCD itself?

author: iainwhite
author_rank: Unknown
timestamp: March 09, 2017, 02:36:11 pm
content: Welcome to the forum!I tried to make my BM235-EEV do the same thing and it didn't - the backlight stayed on when I pressed several places in that area.Maybe you have a poor contact or something similar?Maybe Dave will see your post and reply - might even turn into a video if he can reproduce it!

author: Gywhard
author_rank: Newbie
timestamp: March 09, 2017, 05:05:27 pm
content: Hey! Check THIS out!I seem to have found the solution:What I did was I took it APAAAAAAART, (really didn't like to desolder the two wires connecting the main board to the protection board), and noticed the backlight module was spring-connected to the board. Maybe one of the springs was a bit bent, or maybe the module itself wasn't properly seated, I don't know. I put a dab of contact cleaner on the pads, tightened the self tapping screws in the top part fairly hard, and this seemed to have fixed it!Here's the ultra poor quality video, I was holding my phone with one hand and manipulating with the other: (please also excuse my italian reinterpretation of the english language)https://youtu.be/SNntyelmeLAWell, I'll tag this topic solved (is it a right thing to do?)Let's hope this problem never presents itself again.Weird anyway, in fact I searched quite a bit and didn't found anyone having the same issue.

author: iainwhite
author_rank: Unknown
timestamp: March 09, 2017, 10:10:05 pm
content: Nice work! I'm glad you fixed it. I thought your video was fine too - I could see what you meant regarding the springs.
Maynuo M9714 1200W DC Load - Page 1
Forum section: electronics / testgear

author: dave_k
author_rank: Frequent Contributor
timestamp: March 09, 2017, 04:02:56 am
content: New addition to the workshop.Running at full-blast for the first time - awwww yeah

author: amirm
author_rank: Regular Contributor
timestamp: March 09, 2017, 04:18:08 am
content: Congrats. How noisy are the fans when it is running full blast?

author: dave_k
author_rank: Frequent Contributor
timestamp: March 09, 2017, 04:26:57 am
content: Measured noise level is about 68dBA at the front panel .. the fans are audible but not offensively loud.As the unit cools down the fans spin down until they're barely audible.
Problem with my µCurrent Gold - Page 1
Forum section: electronics / testgear

author: jackenhack
author_rank: Contributor
timestamp: March 11, 2017, 04:26:05 pm
content: Hi!I've been testing my µCurrent Gold, but have a problem. It has an offset on all settings, sometimes positive and sometimes negative. My first guess was that I had blown the ass out of the opamps, so I replaced them with new ones, but the problem persists. At µA an nA ranges, it almost looks like the opamps are oscillating. I've checked all the resistors on the input, and also measured the capacitors, both in the negative feedback and the one on the power line, all measures ok.Anyone have a clue what could be wrong?Jacken
UT353 SPL meter - also C weighting? - Page 1
Forum section: electronics / testgear

author: lpc32
author_rank: Frequent Contributor
timestamp: March 08, 2017, 04:56:59 pm
content: The spec table for theUT353 sound level meterdoesn't claim C-weighting support, yetits manualis contradictory.Page 1 shows the various indicators, including both dBA and dBC. But there's no mention anywhere of how to switch between the modes.Can anyone shed more light?

author: barry14
author_rank: Regular Contributor
timestamp: March 08, 2017, 10:02:04 pm
content: My guess is that the same display is used for different models, some of which have the capability of C weighting. This is often done by many manufacturers to save having to make special displays for each model they make.

author: lpc32
author_rank: Frequent Contributor
timestamp: March 09, 2017, 01:51:16 am
content: Perhaps. But the manual explicitly shows and refers to both.Maybe a hidden feature waiting for someone to unlock.
Where to get a replacement knob for HP 54542C oscilloscope? - Page 1
Forum section: electronics / testgear

author: NeuralNetworkGuy
author_rank: Newbie
timestamp: March 08, 2017, 07:08:07 pm
content: Hi,Anyone knows a place where I could find a knob for HP 54542C oscilloscope like those three darker gray, bigger ones in the picture below? It has a 6mm shaft.Is there a store that sells old replacement parts where I might try to find it?

author: Bryan
author_rank: Frequent Contributor
timestamp: March 08, 2017, 09:42:34 pm
content: May want to try Sphere. They specialize in Tek, but do have some HP parts as well.http://www.sphere.bc.ca/test/tek1.htmlp.s. Be warned their webssite may take you back to the 90's though

author: RayRay
author_rank: Frequent Contributor
timestamp: March 08, 2017, 10:04:49 pm
content: Knobs are very common in electronic stores.You could easily find a compatible one (either locally or online)It wont look exactly the same, but color wise, I'm sure you'd be able to find something similar.
Agilent MSOX3104A over-range weirdness - Page 1
Forum section: electronics / testgear

author: taemun
author_rank: Regular Contributor
timestamp: March 07, 2017, 01:29:58 pm
content: I've been debugging a 24V -> 4V buck synchronous switcher, and noticed the voltage at the inductor input didn't look right. The first attachment shows what I see at 5V/div (the 24V peaks are just off the top of the screen), and the second shows the exact same circuit at 2V/div.Clearly, the scope has difficulty recovering from something 12 divisions above the middle of the screen (ie, 8 divisions over-range)! Has anyone seen weird performance when observing strongly over-range signals on scopes? Should I just expect this?

author: plazma
author_rank: Frequent Contributor
timestamp: March 07, 2017, 01:32:04 pm
content: Anything can happen with over range clipping signals. Don't do that.

author: MarkL
author_rank: Unknown
timestamp: March 07, 2017, 03:43:39 pm
content: You're over-driving the front end amplifier. It's always best to keep the pk-pk of the waveform on the screen. On this particular waveform I think you're just over the limit. If you move the offset down you should see the distortion decrease.If you're actually trying to see the detail near 0V on this waveform, one method would be to first adjust the vertical gain to maximize the on-screen amplitude, turn on averaging, and then use the magnify feature.
Looking for TriCorder Does Everything Handheld:  Scope+TC+BT+DL+Excel - Page 1
Forum section: electronics / testgear

author: MrCreosote
author_rank: Contributor
timestamp: March 07, 2017, 01:19:29 am
content: Actually the CEM DT-9989 had all the features: 20mHz Oscilloscope, Thermocouple inputs, Data Logging, BlueTooth interface, but the scope and BT were terrible.Must be able to produce DL=>BT=>Excel.The Fluke 196C used (under $500) would be a candidate since it data logs, but does not have multimeter inputs - specifically thermocouple.Uni-T 181a is too crappy but no scope frequencies but can't get into to Excel anyway.The SBS600 appears to do everything except no oscilloscope (yes it trends, but no radio frequency scope)Hanteck makes some really cool scopes under $250 but non of the multimeter features.Would be nice if some site had a feature filter to find units, but when you start asking for TC logging with oscilloscopes it falls on deaf ears.I know if I live a few more years, there will be lots of choices...EDIT: PS: The Fluke 289 has a terrible shortcoming: you cannot view Trend Graph while the unit is Data Logging. Real time trend monitoring is necessary when monitoring a critical limit - so maybe you would have to use the BT or PC interface to do this - if those interfaces are capable of doing it.

author: Asymmetric13
author_rank: Unknown
timestamp: March 07, 2017, 08:16:22 pm
content: Hi,I don't (yet) have personal experience of this unit, perhaps another member can provide insight there; but from a feature perspective would this suffice?http://www.gwinstek.com/en-global/products/Oscilloscopes/Handheld_Oscilloscopes/GDS-300_Series

author: MrCreosote
author_rank: Contributor
timestamp: March 09, 2017, 01:20:12 am
content: The GDS-300 is interesting with the temperature data logging.It is frustrating trying to get detailed specs on these devices (even the Fluke 289 will not trend plot while data logging - a major fail). The question about the 300 is will it log ALL inputs?But this is academic since out of my price range and unlikely to find it for sale used. (used I could swing if it did what I wanted.)Thanks.I hate to say it but the OWON B35T+ (or B41T+) are what I'm going to go with until the feature set I"m interested finds it way onto the market. I think in 5 years, half the meters out there will data log, graphics display, and communicate.
HM305 and HM8148-2 printer - Page 1
Forum section: electronics / testgear

author: elecguillaume
author_rank: Newbie
timestamp: April 14, 2016, 03:54:29 pm
content: Hi,I am student in electronic (in France) and I have a question about Hameg equipment.I have an hm305 oscilloscope and I want to connect it to an hm8148-2 printer, but I don't know if it is possible without interface.The output of the HM305 is a DB-25 and the input of the printer is a 26 pin idc connector.Maybe one of them know if it is possible?Thank you in advance for your answer and sorry for my poor English (I work on it).

author: robby1995
author_rank: Contributor
timestamp: March 06, 2017, 08:56:06 pm
content: HI, i hope you're still around here.i ve got the same HAMEG models, and they are just connectet via a straight cableif you cant find the cable, just get the service manual and wire them up as shown therebut its important that you have the HM205-3oherwise it will not work with the HM8148-2printer!for the HM205-2the version1printer should work, for the version 1 of the scope im not sure.but after all it can be quite difficult to get a matching pair due to various other variations.Robert
Is there a kind of multimeter timeline available somewhere ? - Page 1
Forum section: electronics / testgear

author: kultakala
author_rank: Regular Contributor
timestamp: March 05, 2017, 06:45:49 pm
content: Hi Guys,I am interested in all electronics stuff in general, like everyone here i guess.But especially i like multimeters, to be more precise digital multimeters.Mostly i like vinatge ones from the 60s to the 80s.I could find some information about production years of some specific devices and i can get a clue of the first production year by looking at the copyright on user manuals. But user manuals are not available for some devioces and its not possible to get catalogues like from HP which are available online.So, does anyone know of a site, wiki or something which shows timeline of multimeters from HP/Agilent, Keithley, Fluke, Datron, Prema, Solartron, etc. ?Regards,Olaf

author: mmagin
author_rank: Frequent Contributor
timestamp: March 06, 2017, 03:37:27 am
content: For some of the HP DMM history, seehttp://hpmemoryproject.org/wb_pages/wall_b_page_14b.htmAnd also google for the relevant HP journal articles on some of the meters.

author: kultakala
author_rank: Regular Contributor
timestamp: March 06, 2017, 05:43:33 pm
content: Thanks...Does anyone know from when to when schlumberger produced the solartron multimeters ?I cant find anything about the company itself...