Anritsu MG3641A User Manual
Page 103
SECTION 5 MEASUREMENT
STEP
PROCEDURE
7.
Turn on the output of MG3641A/MG3642A
2, place MG3641A/MG3642A 2 into the relative level mode,
and set the output level resolution to 1 dB.
8.
Set the frequency step size of MG3641A/MG3642A
2 to 20 kHz.
9.
Turn the rotary knob to adjust the output level so that the noise output of the receiver is set to V
N
dB
obtained in step 2 each time the Edit [^] key of MG3641A/MG3642A
2 is pressed. The value indicated by
the output level indicator is the disturbing input level separated from the desired wave by +
∆f × n.
10.
Return the frequency and output level of MG3641A/MG3642A
2 in the state set in step 3 (frequency and
output level indicators set to +0).
11.
Turn the rotary knob to adjust the output level so that the noise output of the receiver is set to V
N
dB
obtained in step 2 each time the Edit [
] key of MG3641A/MG3642A 2 is pressed. The value indicated by
the output level indicator is the disturbing input level separated from the desired wave by –
∆f × n.
12.
The following sensitivity suppression characteristics are obtained in steps 9 and 11:
>
80
60
40
20
0
20
40
60
80
120
100
80
60
40
20
Disturbing wave input level (dB)
Disturbing frequency offset [kHz]