Table of Contents
Advertisement
9640A
Instruction Manual
8. Repeat step 7 for the remaining AM depth test points listed in Table 5-8.
9. On the UUT press the Modulation Select softkey and select frequency modulation
10. Use the measuring receiver autotune feature to tune to the input signal and when
11. Measure the FM rate. Verify that the measured rate is within the tolerance listed in
For accurate FM measurements the measuring receiver's setting
demodulation bandwidth setting must be > 3 x {rate + deviation}. In order
to meet this requirement at higher rate and deviation frequencies the
demodulation bandwidth setting must be increased from the default
automatically configured in the modulation measurement mode.
5-16
Frequency
Modulation
125 MHz
1 kHz
100 kHz
1 GHz
1 kHz
100 kHz
(FM). Set the UUT as follows:
Frequency
Level
Mod Rate
FM Deviation
Output
Modulation
tuning is complete set the UUT to Modulation ON.
Table 5-9.
Frequency
Modulation
Rate
125 MHz
1 kHz
1 GHz
300 kHz
Table 5-8. AM Depth Test
Depth
Rate
80 %
80 %
80 %
80 %
125 MHz
+13 dBm
1 kHz (Sine)
300 kHz
OPER
OFF
Note
Table 5-9. FM Rate Test
Deviation
300 kHz
1 MHz
Tolerance
77.5 – 82.5 %
77.5 – 82.5 %
77.5 – 82.5 %
77.5 – 82.5 %
Tolerance
9,999 90 – 1.000 10 kHz
299.990 – 300.010 kHz
Advertisement
Table of Contents
