[hpsdr] Anan 100D problems I am seeing, that appear to be in or resolvable by HPSDR

[Clyde Washburn]

1.        Tx power output on HF is disabled after using the Transverter band(s).  You need to restart HPSDR to get HF output back.

2.       2-tone and voice output power is about 10% lower than TUN, true PEP, using either a Powermaster II or 410C.

3.       Turning on RX2 cancels Panafall on RX1, in that it does not remember that selection when RX2 is turned off.  So if you
flick on RX2 to see it that antenna has a better signal, and decide it doesn't, you have to re-establish Panafall on RX1 afterward.
Seems reasonable to have it remember the prior state of RX1.

4.       The wattmeter is optimistic by about 15%, but seems nicely linear.  It also seems to be even more optimistic at 10m and 6m,
with 50W reading 68W on 6m when calibrated for 50W on 20m.  

5.       The AM carrier level is far too low at 100%, and won't quite make the correct level at the 125%, and using 50W PEP as the
reference level.  Seems like it is counting on 1dB+ PEP compression at 100W.  

6.       The procedure of calibrating the drive at 100W leads to wildly inaccurate levels in the mid range, such as setting power
levels around 35-50W for driving linears.  This because the PA has varying degrees of compression on the various bands at 100W, but
are linear below 75W.  But if you calibrate at 50W then "100W" will not get you 100W, due to compression, so shouldn't the drive go
up to 125+ (equivalent to 1dB or more compression) or so, to allow constant envelope modes to reach 100W, while maintaining accuracy
at lower power levels?

 

Comments?

 

Clyde, K2UE

 

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