HP 4395A - Page 89

16. NOISE SIDEBANDS TEST (SA)
Description
This test applies 10 MHz, 100 MHz, and 500 MHz CW frequency signals to the HP 4395A R
input. Then this measures noise sidebands at osets 1 kHz, 10 kHz, 100 kHz and 1 MHz from
each carrier using a HP 4395A NOISE FORM function. Using the noise form function and the
delta marker mode, the noise sidebands level is displayed directly in [dBc/Hz].
Specication
Noise sidebands
Oset from Carrier Noise Sidebands
 1 kHz < 0 97 dBc/Hz
 100 kHz < 0 110 dBc/Hz
Test Equipment
Signal Generator ::: :::: ::::: :::: ::::: :::: ::::: :::: :::: ::::: :::: ::::: :::: ::::: :::: :::::
HP 8663A
Type-N Cable,61 cm ::: ::::: :::: ::::: :::: :::: ::::: :::: ::::: :::
HP 11500B or part of HP 11851B
BNC cable, 122 cm ::::: :::: ::::: :::: ::::: :::: ::::: :::: :::: ::::: :::: ::::: :::: ::::: :
PN 8120-1840
Procedure
1. Initialize the signal generator. Then set the amplitude to 0 dBm.
2. Connect the test equipment as shown in Figure 2-23.
Note
Connect the signal generator's 10 MHz frequency reference output to the
HP 4395A EXT REF Input on the rear panel as shown in Figure 2-23 . With this
conguration, both the signal generator and the HP 4395A are phase locked to
the same reference frequency to obtain a stable measurement.
Performance Tests 2-57