Fluke 96000 Series Service Manual page 58

96000 Series
Service Manual
9. On the UUT, push the Modulation Select softkey and select frequency
10. Use the Measuring Receiver autotune feature to tune to the input signal and
11. Measure the FM rate. Verify that the measured rate is within the tolerance
For accurate FM measurements, the Measuring Receiver's setting
demodulation bandwidth setting must be >3 x {rate + deviation}. 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.
+13 dBm
12. Set the UUT as follows:
13. Use the Measuring Receiver autotune feature to tune to the input signal
14. Measure the FM deviation. Verify that the measured deviation is within the
15. Repeat step 14 for the remaining FM deviation test points listed in Table 3-
16. Set the UUT output to STBY. Remove all connections to the Leveling Head.
3-16
modulation (FM). Set the UUT as follows:
Frequency
Level
Mod Rate
FM Deviation
Output
Modulation
when tuning is complete set the UUT to Modulation ON.
listed in Table 3-8.
Table 3-8. FM Rate Test – Levelling Head (96040A and 96270A)
Level Frequency
62.5 MHz
62.5 MHz
Frequency
Level
Mod Rate
FM Deviation
Output
Modulation
and when tuning is complete set the UUT to Modulation ON.
tolerance listed in Table 3-9.
9. When setting a new carrier frequency, select MODULATION OFF and
repeat step 13 prior to repeating step 14.
62.5 MHz
+13 dBm
1 kHz (Sine)
300 kHz
OPER
OFF
Note
Modulation
Deviation
Rate
400 Hz 30 kHz
300 kHz 1 MHz
125 MHz
+13 dBm
1 kHz (Sine)
1 kHz
OPER
OFF
Tolerance
±0.11 Hz
±10 Hz