Specifications

Chapter 8 185
Performance Tests
RF Generator FM Flatness Performance Test 3
Procedure
Steps 1, 2, and 3 in the following procedure apply to both of the setups
(shown in Figure 8-5 and Figure 8-6 on page 184).
1. On the measuring receiver:
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).
2. On the Test Set:
a. Press
Preset.
b. Select the INSTRUMENT CONFIGURE screen.
c. Set the RF Display field to Freq.
d. Select the CDMA GENERATOR screen.
e. Set the CW RF Path field to Bypass.
f. Select the RF GENERATOR screen.
g. Set the RF Gen Freq to 521 MHz.
h. Set the Amplitude to -10 dBm.
i. Set the AFGen1 To field to FM at 50 kHz deviation with the FM set
to On.
3. For frequencies up to 1000 MHz measure the FM deviation at the RF
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.
Equation 8-1
The following steps are for measurements to 2 GHz.
4. On the signal generator:
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.
dB 20 •
Deviation
Deviation at 1 kHz
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