HP ESA-L1500A, User'S And Calibration Manual

Page: 250 / 326

Chapter 9 249
Performance Verification Tests
13. Frequency Response
21.Adjust the frequency synthesizer amplitude until the spectrum
analyzer marker reads
−
14 dBm. This corresponds to the amplitude
at 100 kHz recorded in step 10 . Record the DVM amplitude in
column 2 of Table 9-16 for DVM Amplitude at 100 kHz.
22.On the spectrum analyzer, press
Peak Search
,
Marker
,
Marker
∆
.
23.Set the spectrum analyzer and the frequency synthesizer to the next
frequency settings listed in Table 9-16 .
24.At each frequency, adjust the frequency synthesizer amplitude for a
Sig-
∆
-Trk amplitude reading of 0.00
±
0.05 dB.
25.Record the DVM amplitude setting in column 2 of Table 9-16 as the
DVM amplitude.
26.Repeat step 23 through step 25 for each frequency setting listed in
Table 9-16 .
27.For each of the frequencies in Table 9-16 , subtract the DVM
Amplitude (column 2) from the DVM Amplitude at 100 kHz recorded
in
step 21 . Record the result as the Response Relative to 100 kHz
(column 3) of Table 9-16 .
28.Add the entry from Table 9-15 column 2 (100 kHz Error Relative to
50 MHz) that was recorded in step 10 , to each of the entries in Table
9-16 column 3 (Response Relative to 100 kHz). Record the results as
the Response Relative to 50 MHz (column 4) in Table 9-16 .
Test Results
Perform the following steps to verify the frequency response of the
spectrum analyzer.
1. Enter the most positive number from Table 9-16 , column 4:
____________ dB
If your analyzer is equipped with 75
Ω
Input, no entry is necessary.
2. Enter the most positive number from Table 9-15 , column 2:
____________ dB For 75
Ω
Input use column 5.
3. Record the more positive of numbers from step 1 and step 2 in TR
Entry 1 of the performance verification test record.
4. Enter the most negative number from Table 9-16 , column 4:
____________ dB
If your analyzer is equipped with 75
Ω
Input, no entry is necessary.
5. Enter the most negative number from Table 9-15 , column 2:
____________ dB For 75
Ω
Input use column 5.