HP ESA-L1500A, User'S And Calibration Manual

Page: 300 / 326

Chapter 9 299
Performance Verification Tests
23. Harmonic Spurious Outputs, Options 1DN and 1DQ
Procedure
1. Press
Preset
on the spectrum analyzer, then wait for the preset
routine to finish. Set the spectrum analyzer by pressing the
following keys:
Frequency
,
10 MHz
Span
,
Zero Span
Amplitude, Amptd Units, dBm, Done
Source Amptd
,
Amplitude On Off
(On),
0 dBm
(50
Ω
RF Output only)
Source Amptd
,
Amplitude On Off
(On),
+42.76 dBmV
(75
Ω
RF Output only)
Single Sweep
2. It is only necessary to perform the next step if more than two hours
have elapsed since a front-panel calibration of the microwave
spectrum analyzer was performed.
The microwave spectrum analyzer should be allowed to warm up for
at least 30 minutes before proceeding.
Perform a front-panel calibration of 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.
• Connect a BNC cable between CAL Output and RF Input.
• Press
2
−
22 GHz
(
INSTR PRESET
),
RECALL
,
8
. Adjust AMPTD CAL
for a marker amplitude reading of
−
10 dBm.
• Press
RECALL
,
9
. Adjust FREQ ZERO for a maximum amplitude
response.
• Press
SHIFT
,
Frequency SPAN
to start the 30 second internal error
correction routine.
• Press
SHIFT
,
START FREQ
to use the error correction factors just
calculated.
3. Connect the Type-N cable from the tracking generator output to the
microwave spectrum analyzer RF Input as shown in Figure 9-27 .
4. Set the microwave spectrum analyzer controls as follows:
CENTER FREQUENCY, 10 MHz
SPAN, 100 kHz
REFERENCE LEVEL, +5 dBm
(50
Ω
RF Output only)
REFERENCE LEVEL, 0 dBm
(75
Ω
RF Output only)