[hpsdr] Janus frequency response ?

[Al]

FWIW ...

Okay. After setting jumpers R2 & R17 on the Janus board  Here are some 
new numbers... ( Un jumpered  included for comparison )


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...
                                         R2 & R17 Shorted
             R2& 17 open       Before       After
                            Ref        Recal         
Recalibration                Ref
Freq.      I&Q       1Khz      I&Q        I         Q          I&Q      1Khz
              (dbm)   
1Khz     -52.0        0db      -38.3       -66.4  -66.5     -64.0       0db
5Khz     -53.0       -1          -38.5       -66.5  -66.6     -63.9     +0.1
10Khz   -53.0       -2          -38.4       -66.4  -66.5     -64.0       0
20Khz    -54.8      -2.8       -38.5       -66.9  -66.6     -64.3      -0.3
40Khz    -58.5      -6.5       -38.9       -66.7  -66.6     -64.5      -0.5
80Khz    -64.0      -8.0       -41.0       -66.9  -66.7     -65.6      -1.4

The levels displayed within the pan adapter display where slightly 
different above the DDS Freq compared to below the DDS frequency.  The 
numbers reported above are the greater of the two responses.

AL, K0VM

 1181169953.0