When I first setup my PCS500 + PCG10 with PC-Lab 2000SE in the Bode Plot mode, I was running it with an open connection (Vss=5V, no connection from signal out to IN1). Astonishing I got -60dBV from DC to about 40kHz, but only -24dbV above 40kHz. How can I fix that?
Could you please describe your test circuit more detailed. What is the " Vss=5V"?
I made similar test. No input connection to the PCS500 and I got following result:
Hz Vrms dBV
1000 0.0010 -60.252
2000 0.0007 -63.221
3000 0.0007 -62.591
4000 0.0009 -60.668
5000 0.0004 -68.104
6000 0.0006 -64.842
7000 0.0005 -65.710
8000 0.0005 -66.702
9000 0.0006 -65.149
10000 0.0004 -68.205
20000 0.0004 -67.952
30000 0.0004 -68.111
40000 0.0004 -67.764
50000 0.0004 -68.269
60000 0.0004 -68.052
70000 0.0004 -66.965
80000 0.0004 -67.371
90000 0.0004 -68.947
100000 0.0004 -67.821
200000 0.0003 -69.349
300000 0.0004 -67.824
400000 0.0004 -68.354
500000 0.0004 -67.608
600000 0.0004 -68.485
700000 0.0003 -69.969
800000 0.0004 -67.601
900000 0.0004 -68.667
1000000 0.0004 -67.761