Agilent Technologies 8935 Series, Manual

Page: 180 / 343

Chapter 8 179
Performance Tests
RF Generator FM Distortion Performance Test 1
Procedure
Steps 1, 2, and 3 in the following procedure apply to both of the setups
(shown in
Figure 8-1 and Figure 8-2 on page 178 ).
1. On the measuring receiver:
a. Reset the instrument.
b. Set the high-pass filter to 300 Hz.
c. Set the low-pass filter to 3 kHz.
d. Set the measurement mode to FM.
e. Set the measurement mode to audio distortion.
f. 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
10 MHz
.
h. Set the
Amplitude
to
-10 dBm
.
i. Set the
AFGen1 To
field to
FM
at
99 kHz
deviation with the FM set
to
On
.
3. For frequencies up to 1000 MHz measure the FM distortion (audio
distortion) at the RF frequencies and deviations shown in the
Performance Test Record (PTR) and compare the measured
distortion to the limits.
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.