Good morning Rick and all others,Well, I'm using 192K as well - and get the failure very frequently - a demonstration could be done right away and would take me under 1 minute.
This failure is not happening from time to time - it is present all the time.
Since the ANAN-10 is only capable to produce 10W (with its internal little PA) most of us use bigger high gain amplifiers (either LD-MOS, VMOS or tubes) and use low drive power of just a couple watts (1-3W). BTW, in Europe it's legal to manufacture and offer amps with super high gain, such as 50 dB or more (think there are some FCC limitations in the US, correct?).
The ANAN-10 can not handle Pure Signal without modification - or let's better say not really as it should.
The reason is the build-in relay K19 which switches the RX to ground when transmitting. (big isolation!)
Since your ANAN shows a much better and more stable behavior than ours I'm guessing Pure Signal stays alive due to internal cross talk.
When using the ANAN (not modified) you need quite a bit of feedback-power to get Pure Signal running.
Also its dangerous using bigger amps and not modifying the ANAN - imagine K19 is not grounding correctly due to dirty contacts. In this case you are blowing up the internal att or even worst the ADC.
An easy fix is removing the cable from internal plug J29 and feeding the ANAN by external RX and TX cables…..the rest can easily be programmed within Thetis. Pictures and test results are provided @
http://www.qrz.com/db/DL6EAT (scroll down a bit…)
Coming to the point: My guess is your ANAN stays alive due to undefined crosstalk while ours get a specified external low power signal of just about 1 mW (0 dBm) via an external fully sensitive RX-port.
That power level is relatively low but at least according specs. And this level will never produce disturbing unwanted crosstalk.
Just my guess but that could be the reason for our differences.
Is it possible that the current F/W misses to monitor the RX port correctly and all the time? Forgive all my stupid ideas….I'm not a programmer at all: May be there should be somehow a watchdog function ensuring the feedback signal will be monitored continuously? It appears to me that the signal gets lost - and when its lost it stays lost until ptt is released. Or its not even recognized from the beginning….as demonstrated in my little movie. The behavior is at least not consistent - sometimes it works for a minute or two - then it gets lost again and needs to be triggered by 2-tone tests…..strange!
BTW, I can confirm that many, many folks here in Europe use the Hermes board, the Hermes-copy of Gerd Loch or the original ANAN-10 of Apache Labs (like I do).
I have never heard one of them not facing this issue - all the very same. But all use external amps - no QRP. The failure can always be demonstrated right away. The only way getting around this is using "Single Calibration" - not good but Thetis becomes usable on Hermes.
And to be honest Rick once you start using Thetis you don't wonna miss it again
Your help and your efforts are more than appreciated Rick! Think once this is covered the person who finally solves this gets a Golden Star on the "Walk of Hamradio Fame"
Thanks so much and please keep fighting…..
73,
Andy