I was interested in the performance of the output signal. So at first I measured the output power:
10 MHz -12,13 dBm
50 MHz -12,57 dBm
100 MHz -13,21 dBm
200 MHz -14,85 dBm
300 MHz -7,92 dBm
400 MHz -8,07 dBm
500 MHz -8,25 dBm
600 MHz -8,90 dBm
700 MHz -8,57 dBm
800 MHz -8,76 dBm
Frequency Offset:
Set to 100 MHz measurement was 99,999 908 MHz which is an offset of 92 Hz. Excellent !!!
Output Spectrum:
Spectrum is fine up to 270 MHz with harmonics at least 20dB down
However above this frequency there is a strong subharmonic or spurious 12dB higher than the wanted signal. See picture enclosed. I have no idea how this may influence our measurements. In the pictures some sent to the group I can not see negative results.
This probably explains why output power is higer at 300MHz and above.
Ernst
