HP ESA-L1500A, Руководство пользователя и калибровки

Страница: 301 / 326

300 Chapter 9
Performance Verification Tests
23. Harmonic Spurious Outputs, Options 1DN and 1DQ
RES BW, 30 kHz
LOG dB/DIV
,
10 dB
CF STEP SIZE
,
10 MHz
5. Set up the microwave spectrum analyzer by performing the
following steps:
Note that the following steps are for an HP 8566A/B microwave
spectrum analyzer, the steps may be different if you are using
another microwave spectrum analyzer.
• Press
SIGNAL TRACK
(On). Wait for the signal to be displayed at
center screen.
• Press
Mkr
→
Ref Lvl
.
• Press
Peak Search
,
SIGNAL TRACK
(Off),
MARKER
∆
• Press
CENTER FREQUENCY
and the step-up key to tune to the
second harmonic. Press
Peak Search
. Record the marker
amplitude reading in Table 9-26 as the 2nd Harmonic Level for
the 10 MHz Tracking Generator Output Frequency.
• Perform this step only if the Tracking Generator Output
Frequency is less than 500 MHz. Press
CENTER FREQUENCY
and
the step-up key to tune to the third harmonic. Press
Peak Search
.
Record the marker amplitude reading in Table 9-26 as the 3rd
Harmonic Level for the 10 MHz Tracking Generator Output
Frequency.
• Press
MARKER
(Off).
6. Change the spectrum analyzer center frequency to the next
frequency listed in Table 9-26 .
7. Change the microwave spectrum analyzer center frequency and
center frequency step size to the next frequency listed in Table 9-26 ,
then repeat step 5 . Note that the microwave spectrum analyzer
frequency is the same as the Tracking Generator Output Frequency.
Table 9-26 Harmonic Spurious Responses Worksheet
Tracking
Generator
Frequency
2nd
Harmonic
Level (dBc)
3rd
Harmonic
Level (dBc)
10 MHz
100 MHz
300 MHz
750 MHz N/A