[hpsdr] Janus frequency response ?
Al
K0VM at arrl.net
Wed Jun 6 13:14:48 PDT 2007
FWIW ...
I feed an HP-204C audio gen directly into the Janus I/Q input connector
Input). I with 145mv from the sig gen, I read the following levels as
reported at the bottom right of the Power SDR (1.6.3) pan adapter screen...
Freq. I(only) Q(only) I&Q Relative to 1Khz I&Q
1Khz -54.7 -55.1 -52.0 (dbm) 0db
5Khz -55.0 -55.2 -53.0 -1
10Khz -55.3 -55.4 -53.0 -2
20Khz -57.3 -57.5 -54.8 -2.8
40Khz -61.4 -61.4 -58.5 -6.5
80Khz -67.2 -67.5 -64.0 -8.0
The levels displayed within the pan adapter display where slightly
different above the DDS Freq compared to below the DDS frequency. The
number reported above are the greater of the two responses.
AL, K0VM
1181160888.0
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