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| Anritsu MT8801A/B/C & MT8802A |
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| Monolith:
@howardlong: Thank you so much! Your PCMCIA image revived it! At first it didn't startup correctly (after loading all modules the display just went blank). Booting with holding the PRESET button brought it back to live. I haven't done any verification tests yet, but i hope calibration data is not stored on the PCMICA ATA card. I hope calibration is held somewhere on the cpu board. otherwise the unit needs a full calibration. Filesystem of the PCMCIA card is just FAT16, so easy handling with MS Windows clients.. Display is a bit dim at the moment, looks like this will be a backlight replacement project for the future (beside cap replacements). At the moment time for hobby stuff is really rare, i hope i can start this after new year.. It seems, that the most important SA option is working (see pic)! :-+ |
| Howardlong:
I have two, one that I re-capped has a great display (after re-capping) but has a u/s main port after I inadvertently Tx'd into it (I don't actually ever remember transmitting, but it was directly after testing a transcevier on it). There is an expensive attenuator on the main port that's broken that I can't figure out how to replace (can't undo screws). The aux port works fine for my use. The display on the first unit has developed a more recent fault where, particularly in warm weather, it randomly writes to the screen, but otherwise works fine. I can still control it perfectly via GPIB once I figure out the commands, which are much easier to figure out when you have a working display! Reseating the cards seems to fix the display random writes for a few days, only for it to return later. Of course, with the lid off the problem never happens. The other unit has a very dim display plus its signal generator seems to be kaput (about 20dB down) on both ports, but I've never had it apart to fix it. Edit: more recently I switched to using an Agilent 8935 for most of the measurements I'd been using the Anritsus for as part of a production test suite process. A shame, as the Anritsus offer significantly greater bandwidth over the Agilent, but the reliability of the Anritsus is none too special. |
| rskron11:
Hello All, Thank you Howardlong as I was also able to load the OS that you supplied to a new card for a MT8802a that also had a failed PCMCIA card. The OS seems to load fully (I have it in verbose mode) but I get a indecipherable system error as it is about to load the user interface. Unfortunately I do not have the service manual and I can't make heads or tails of it. Would any of you have experience with this error or have some tips on how I can further troubleshoot? Thanks in advance, Scott |
| Monolith:
How did you write the image to the PCMCIA Card? I have used Win32diskimager. It is crucial to unmount the memory card before you pull it out of the PC after the writing process. Otherwise it could be that not all data has been written to the card as the OS sometimes still caches data which still has not been written to the memory card (Windows and Linux). What's the brand and model of the card? Try a different one if possible.. |
| rskron11:
Thank you @Monolith for your reply. I am using a SanDisk PCMCIA compact flash adapter with a 32 MB CF card. I did rewrite the card per your advice and unmount it properly (ddn't do that before) after using Win32diskimager to write it. It does appear to write successfully and shows no errors when checked. It does of course write a 20 mb card, but it appears intact. I'll see if I can get an exact replacement (SanDisk 20 mb card), though my feeling is something else is happening. It does get all the way through to the TX/RX module test - there is a relay click, and the error occurs. The rest of the OS loads fine and all testing of processor, memory, battery, etc passses. I took a look at voltages off of the PSU and each of the cards (where supplied) and they do check out. There area few caps here and there (I did not do a systematic check) that had a slightly high ESR - I did replace those. Didn't go into the RF boards as I felt this was more of a digital problem. I am wondering if the OS is looking for something that is not there or if there is a ROM somewhere that this OS is not talking to (different version?) Thanks again for your reply and any help that anyone might be able to offer. ScottK |
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