LeCroy PP092 2Gs/sec adapter - Page 1
Forum section: electronics / testgear

author: davorin
author_rank: Unknown
timestamp: July 26, 2014, 08:46:19 pm
content: Good evenin'...Just came across this LeCroy PP092 adapter suitable for 9354 models...What benefit would it give when replacing two channels with this adapter?Would I end up with 3 channels, and one of them with higher bandwidth?

author: grumpydoc
author_rank: Super Contributor
timestamp: July 26, 2014, 09:23:54 pm
content: No, you end up with a single channel.The normal mode of the 'scope is 4 channels @500MHz analogue bandwidth with 500Ms/s sampling, if you put it into "two channel mode" you get two channels (2+3) at 1Gs/sIf you then put the adapter onto channel 2+3 you get a single channel with 2Gs/s, the analogue bandwidth remains 500MHzHTH

author: davorin
author_rank: Unknown
timestamp: July 26, 2014, 09:36:08 pm
content: Ah okay....It switches automatically to 1Gs/sec when I switch of Ch1 and Ch4?So the 2GS/sec labelled on DSO is only achievable with the PP092 adapter, not with 3 channels off....Saw the PP092 on ebay, one item from Germany around US$ 130, and two PP092 from the US for US$ 99.99, though shipping costs not known yet...But then again, what would I do with two of those (o;

author: AlfBaz
author_rank: Super Contributor
timestamp: July 26, 2014, 10:10:47 pm
content: I have an LC574AL and am waiting for a PP094 to arrive from Israel (are their planes flying yet?) $53AUD and about $10AUD postage on fleabay.I would keep looking around, I think $100 is a bit steep for a PP092

author: AlfBaz
author_rank: Super Contributor
timestamp: July 26, 2014, 10:14:29 pm
content: Quote from: davorin on July 26, 2014, 09:36:08 pmSimply turning the channels off wont do it. I don't know the menu system for your scope but for mine its in the timebase menu "Channel Use" where you can select 4, 2 or peak detect

author: marshallh
author_rank: Unknown
timestamp: July 27, 2014, 12:46:06 am
content: it contains an eeprom that sets the scope to gang up all the ADCs into 2 physical channels. It is 50ohm input terminated only.Inside the adapter is a microstrip delay line and 3way power splitter to produce 2 analog signals, 180 degrees out of phase.These 2 physical channels are then interleaved digitally for your total of 2gs/sec.The exact model number of adapter you need depends on your scope. There are several, make sure you get the one that is compatible.Mine cost $40, but some are easier to find

author: AlfBaz
author_rank: Super Contributor
timestamp: July 27, 2014, 02:08:45 am
content: Quote from: marshallh on July 27, 2014, 12:46:06 amJust checked the manual mine is supposed to be a PP092

author: grumpydoc
author_rank: Super Contributor
timestamp: July 27, 2014, 08:25:21 am
content: QuoteI don't think there's a 180ophase shift - just a 50ohm splitter and delay line.QuoteNot so much with three channels off but with all four combined to give the 2Gs/s rateQuoteHmmm, are you sure? The LC574AL is 1GHz bandwidth 4x1Gs/s which can be combined for 4Gs/s - that would sound llike the PP094 is the one you need.

author: AlfBaz
author_rank: Super Contributor
timestamp: July 27, 2014, 03:34:17 pm
content: Quote from: grumpydoc on July 27, 2014, 08:25:21 amNo I'm not sure. What you are saying makes perfect sense and a text document on Ko4bb's site in the lecroy folder suggest that it is indeed the pp094 for the LC574ALLooking through all of the documents I have for this scope I can't find where it is I read it. Probably a mix up on my part as a lot of these docs serve a wide range of LC scopes including the 500MHz 374

author: Clemgill
author_rank: Contributor
timestamp: September 12, 2015, 11:57:01 am
content: Hi,I bought a PP092 adaptor for my LS334AM.It works well as far as providing 2GS/sec in the appropriate conditions (i.e.: intrinsic rate limited to 0.5ns/point)But it provides me with the max 2M samplesONLY in the Tdiv=0.1ms selection....When Tdiv is shorter than 0.1ms it is OK because you cannot sample faster that 0.5ns/ptBut when Tdiv in larger than 0.1ms, the scope falls down to 1M and stays there instead.... (why not staying to 2M??)Any clue?Thx much,Gilles.

author: sprok
author_rank: Contributor
timestamp: May 29, 2016, 05:24:33 am
content: .

author: sprok
author_rank: Contributor
timestamp: May 29, 2016, 05:18:49 pm
content: .

author: wraper
author_rank: Unknown
timestamp: May 29, 2016, 05:34:03 pm
content: Quote from: sprok on May 29, 2016, 05:18:49 pmTest this with few hundred MHz signal. If sample timing is not right you certainly will have a distorted waveform.

author: sprok
author_rank: Contributor
timestamp: May 30, 2016, 08:46:10 pm
content: .

author: AlfBaz
author_rank: Super Contributor
timestamp: May 30, 2016, 08:56:10 pm
content: Quote from: sprok on May 30, 2016, 08:46:10 pmI have the pp094. It's early morning here, I'll post some close up photos and see if I can extract the eeprom contents later tonight. One thing I remember is that the tracks to both outputs are symmetrical, unlike thepp092pp093 pictured above

author: sprok
author_rank: Contributor
timestamp: May 30, 2016, 10:50:17 pm
content: .

author: AlfBaz
author_rank: Super Contributor
timestamp: May 31, 2016, 12:00:24 pm
content: Quote from: sprok on May 30, 2016, 10:50:17 pmHere you go. It's a binary file (*.bin) renamed it to *.txt to allow it to be uploaded here.If you need any more details or close up photos, let me know

author: sprok
author_rank: Contributor
timestamp: May 31, 2016, 12:12:50 pm
content: .

author: sprok
author_rank: Contributor
timestamp: June 02, 2016, 01:38:41 am
content: .

author: AlfBaz
author_rank: Super Contributor
timestamp: June 02, 2016, 01:46:54 am
content: Wow, that's pretty cool

author: sprok
author_rank: Contributor
timestamp: June 13, 2016, 12:34:45 am
content: .

author: AlfBaz
author_rank: Super Contributor
timestamp: June 13, 2016, 03:35:40 am
content: Using microstrip (conductor over ground plane) and stripline (conductor between ground planes) calculators you can see that impedance increases with distance from the ground plane. Given the likelihood that on a pcb the distance between conductor and ground plane will be much smaller than your prototype, you should see a significant drop in line impedance. The task would then be to match impedances between the strip and your terminators

author: iopq
author_rank: Contributor
timestamp: June 20, 2016, 02:37:29 am
content: hello. please dump 24lc02 pp092 to lecroy 9354tm.

author: robert_
author_rank: Regular Contributor
timestamp: June 20, 2016, 12:12:44 pm
content: PP092 .hex here:

author: iopq
author_rank: Contributor
timestamp: June 26, 2016, 11:12:04 am
content: there you are. LED diode the stabilization

author: sprok
author_rank: Contributor
timestamp: June 26, 2016, 02:25:25 pm
content: .

author: iopq
author_rank: Contributor
timestamp: June 26, 2016, 03:45:58 pm
content: Yes. I know the language poorly and has to use a translator .I stuck to this tape , put in 5 -pin (+12, SDA, SCL, GND, Sense). then filled with epoxy resin pins and wait for solidification . further polished using a Dremel hand . CAT24C08 memory used by Apple iPhone 5S (U6). on top of all the filled ultraviolet glue.

author: sprok
author_rank: Contributor
timestamp: July 19, 2016, 06:07:28 pm
content: .

author: robert_
author_rank: Regular Contributor
timestamp: July 19, 2016, 06:49:34 pm
content: solidly clamp the PCB and then use a soldering iron with a really wide tip as to heat all of the pads (and use enough fresh solder) at once and then pull off the connector.Worked fine for me.

author: sprok
author_rank: Contributor
timestamp: July 19, 2016, 07:01:50 pm
content: .

author: robert_
author_rank: Regular Contributor
timestamp: July 19, 2016, 07:11:02 pm
content: It worked for me with heating for maybe 5 seconds before it could be pulled off with some force. Used a JBC iron with a wide tip, set to 370°C or so.The BNC insulator is PTFE so will tolerate some heat, the ground pins are solid enough to withstand some force (sideways, not up/down) if needed, as long as the center pin has all its solder liquid.I have disassembled an PP092 to build an adaptor for a Tek high voltage diff probe, and a copy of the (really expensive) CA10 current sensor adaptor. Probably going to post it here once i get my boards.

author: sprok
author_rank: Contributor
timestamp: July 19, 2016, 10:10:07 pm
content: .

author: Someone
author_rank: Super Contributor
timestamp: July 19, 2016, 11:14:58 pm
content: Quote from: sprok on July 19, 2016, 06:07:28 pmThe "best" source I could find was ebay, they don't have board edge connectors specifically but the through hole design can be bodged, or design a PCB around the PCB being in the mating plane of the connectors to match.

author: azer
author_rank: Regular Contributor
timestamp: December 16, 2016, 02:38:05 pm
content: Anybody have the eeprom dump and a possible picture of the PP096 adapter for the LC684 series?

author: macboy
author_rank: Super Contributor
timestamp: December 16, 2016, 06:13:55 pm
content: Quote from: sprok on June 13, 2016, 12:34:45 amI'd recommend positioning the resistive power divider - all of the resistors - right at the BNC input jack, then use a short piece of 50 ohm coax to connect to the two BNC outputs. The three resistors forming the power divider should be positioned as close together as possible, rather than directly on each connector. The AC impedance at each of the three input/outputs of the power divider star network is 50 ohms, but the impedance at the middle node is not 50 ohms. Keep that node as small as possible, and you will probably eliminate a lot of the issues you see.