Agilent Technologies 8935 Series, Manual

Page: 196 / 343

Chapter 8 195
Performance Tests
RF Generator Harmonics Spectral Purity Performance Test 6
RF Generator Harmonics Spectral Purity
Performance Test 6
The purpose of this test is to verify that the Test Set meets the
specification limits in PTR (Performance Test Record)
Table 9-6, “RF
Generator Harmonics Spectral Purity Test 6 Record,” on page 250 .
Harmonic signals with the carrier set to several frequencies and two
different levels (maximum output and minimum level vernier) are
searched for by an RF spectrum analyzer.
Figure 8-11 Setup
Procedure
1. Set up the spectrum analyzer in accordance with its operating
manual.
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
1 MHz
.
h. Set the
Amplitude
to
-10 dBm
.
3. Set the test set’s RF generator to the frequencies and levels shown in
the Performance Test Record (PTR) and measure the second and
third harmonics. For each measurement convert the harmonic level
to dB below the fundamental (dBc) and compare the computed levels
to the limits.
INPUT 50
Ω
DUPLEX OUT
Spectrum Analyzer