HP 8590 EM manual 56

6. Noise Sidebands, HP 8590 EM-Series

4.Calculate the Noise Sideband Suppression at 30 kHz by subtracting the Carrier Amplitude from the Maximum Noise Sideband Level at 630 kHz. Use the equation below.

Noise Sideband Suppression = Maximum Noise Sideband Level 0 Carrier Amplitude

5.Record the Noise Sideband Suppression at 30 kHz in the performance

veri￿cation test record as TR Entry 3. The suppression should be ￿075 dBc.

Noise Sideband Worksheet

DescriptionMeasurement

Carrier Amplitude	dB￿V
Noise Sideband Level at +10 kHz	dB￿V
Noise Sideband Level at 010 kHz	dB￿V
Maximum Noise Sideband Level at 610 kHz	dB￿V
Noise Sideband Level at +20 kHz	dB￿V
Noise Sideband Level at 020 kHz	dB￿V
Maximum Noise Sideband Level at 620 kHz	dB￿V
Noise Sideband Level at +30 kHz	dB￿V
Noise Sideband Level at 030 kHz	dB￿V
Maximum Noise Sideband Level at 630 kHz	dB￿V

Note that the IF bandwidth is normalized to 1 Hz as follows:

1 Hz noise-power = (noise-power in dBc) - (10 2 log[IF BW])

For example, 060 dBc in a 1 kHz IF bandwidth is normalized to 090 dBc/Hz.

2-28 Performance Veri￿cation Tests