I got the spectrum analyzer started today and got 2 things tested.
The spectrum analyzer also has a frequency counter (with external reference input in it, so I did a frequency test of the TS790. It looks good, the 1296MHz was less than 200Hz after some warm-up. Another test will be after several hours. This looks excellent! The spectrum also looks good, and the maximum outputis just over 10W.
The old SSB Electronics LT23 transverter got tested, too.
The frequency looks like 3kHz too low. If the stability is good enough that is acceptable if there is not too much drift.
The output looks like 5W at 1dB compression.
The spectrum is not really pretty. I see 5MHz sidebands about 50dB down. A quick test of the base transceiver, my Standard C710 showed no extra sidebands, so it must come from the transverter.
As I used manual TX switching I might have destroyed the RX mixer, this needs to be tested, too. Yes, that happens sometimes, even if you are careful.
It looks like the transverter needs some work, but it could be used for some initial experiments if the RX part still works.
Update:
After several hours of warm-up the TS790 is about 1.5kHz above nominal. This is likely to be adjusted in place, but can provide an acceptable performance in any case.
No comments:
Post a Comment