As mentioned in other topics the 33 factory calibration constants in a CSA803A/B/C (and corresponding 11800 models) can be set, but not read, in U500/U511 using the GPIB command calcorrection. These c

https://web.archive.org/web/20120520114225/http://www.jammaboards.com/store/tektronix-tm500-series-extender-kit-tm500-kit.html Albert Albert

I once assumed that a clutch roller length, specified as 0.236" (5.9944 mm), was 6 mm. Totally wrong! This was the reprimand by a respected British motorcycle technician: --- If a british engineer "ai

Jamma makes (or made) kits for TM500 extension cables. A Google search for "jamma boards connector TM500" will immediately show you 3.96mm/0.156" . Albert

Hi Chris, A few messages ago I wrote this: I based this on resistance measurements at the plug but in hindsight I found that 18k to GND somewhat strange. Today I even couldn't position the trace at th

Bob, Those schematics are in tek-1a5.pdf and it seems that the 1a5 always had the fet input. There are 2 7586 nuvistors in the output stage, V164/264. Albert

Hi Chris, This probably is thermal "DC shift due to overdrive". You might follow the checks in Section 6 Step 22. Unlike the 7A13 the 1A5 has no adjustments here. Note that is recovery is checked (als

Some thoughts without studying the schematics too long. I choose a similar remedy for a P6302. Soldered R18 to "A" and decreased the value. Wired side "E" of the Hall sensor to "K" (gnd) via 18k. Both

Thank you Chuck for that hint! Very strange, those few words "some of the" omitted in the 11801C service manual while present in the CSA803C service manual. Probably an unintended omission since the w

For the 11801C it only lists user and programmer manuals, not the service manual. Albert

Are you sure Chuck? The CSA803C service manual says at the same page 2-6: I don't have the 11801C manual (the Tekwiki link reports missing). Albert

Hi Raymond, You are right! I misinterpreted the function of the GSF (a little bit stupid since the vertical signal I referred to is not at all involved here). Apparently the blanking signal is include

OK Reg, but I still can't understand how this would work. I suppose each trigger event results in a sample. At each trigger event the position on the ramp advances 1.1 ns when compared to the previous

Hi Raymond, I agree with your interpretation, retrace samples appear in the acquired waveform. But I think your suggested remedy is not working. The Z-axis blanking is itself a result of internal sign

Reg, Fun indeed!! I tried your setup with less sophisticated signal source: CSA803, internal triggering, 1 ps/div, 1024 points. FG504 set for triangle waveform approx 100 kHz. FG504 trigger out connec

Sorry to disagree with this Reg. The period is 10 us and a shift of 1 period would require about 9000 periods, not 1024. The frequency difference should be a factor 9 larger. Still my view that the ti

Jack, I may have overlooked an answer to this *old* question. The batteries in my CSA803 were dead on arrival. So I also had to replace the batteries (plus chips) without restoring any data. The frequ

Hi Reg, I try to understand what's going on but don't see it. What is wrong in the following reasoning? The trigger and ramp periods are equal to and almost equal to 10 us, with a difference of 10^-6

Hi Reg, I think you refer to my message #158778. The GPIB command ccalcorrection does the job. That command was present in the CSA803A but not yet in the CSA803.This suggests that the calibration cons

/ / The challenge would be how to iteratively adjust the NVram constants without removing the NVram chips a thousand times. I don't know of any GPIB way / to SET the value of each NVram cal constant,