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Procedure
NOTE
Test Sets with firmware revision A.04.5X and above operate only at RF
frequencies from 800 to 1000 MHz and 1700 to 2000 MHz. A text only error
message "Input value out of range" , will be displayed if invalid
frequencies are set.
Steps 1, 2, and 3 in the following procedure apply to both of the setups (shown
in
1. On the measuring receiver:
2. On the Test Set:
3. For frequencies up to 1000 MHz measure the FM deviation at the RF
4. On the signal generator:
figure 6-5
and
figure 6-6 on page
a. Reset the instrument.
b. Set the measurement mode to FM.
c. If the microwave converter is being used, set the frequency offset mode to
exit the mode (27.0 Special).
a. Press
.
Preset
b. Select the CONFIGURE screen.
c. Set the RF Display field to Freq.
d. Set the RF Offset to Off.
e. Set the Output Port field to Dupl.
f. Select the RF GENERATOR screen.
g. Set the RF Gen Freq field to the appropriate RF frequency (based on the
firmware revision; see NOTE above) from the Performance Test Record.
h. Set the Amplitude to -10 dBm.
i. Set the AFGen1 To field to FM at 50 kHz deviation.
frequencies and rates shown in the Performance Test Record (PTR). Convert
the measurement results to dB referenced to the deviation measured at 1 kHz
using the following formula and compare the calculated deviation to the limits
in the PTR.
dB
=
The following steps are for measurements to 2 GHz.
a. Set the frequency to 1500 MHz CW.
b. Set the level to +8 dBm or whatever level is suitable for the microwave
converter's LO input.
RF Generator FM Flatness Performance Test 3
152).
Deviation
•
-------------------------------------------- -
20
log
Deviation at 1 kHz
Performance Tests
153
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Troubleshooting
