Agilent Technologies 8935 Series, Руководство пользователя

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Chapter 8 189
Performance Tests
RF Generator Residual FM Performance Test 4
d. Set the low-pass filter to 30 kHz.
4. 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
.
5. For frequencies up to 1000 MHz and for each line in the Performance
Test Record (PTR) do the following:
a. Set the signal generator (used as an LO for the measuring
receiver) to the LO frequency shown in the PTR.
b. Set the Test Set to the RF frequencies shown in the PTR.
c. Measure the ac level (in mV) on the audio analyzer.
d. Multiply the measured ac levels by 1000 to convert them to FM
deviation in Hz and compare the computed results to the limits
shown in the PTR.
The following steps are for measurements to 2 GHz.
6. On the signal generator:
a. Set the frequency to 1500 MHz CW for 1700 MHz, 1800 MHz CW
for 2000 MHz.
b. Set the level to +8 dBm or whatever level is suitable for the
microwave converter’s LO input.
7. On the measuring receiver:
a. Set the frequency offset mode to enter and enable the LO
frequency (27.3 Special).
b. Key in the LO frequency (in MHz) which is 1500 MHz.
8. On the Test Set, for frequencies of 1700 and 2000 MHz, continue on
as in step 5.