Table 2-23. Frequency Response Test Settings 2
Function Generator
Frequency
HP 4395A
Center Frequency Frequency Span RBW
10 Hz 10 Hz 15 Hz 1Hz
15 Hz 15 Hz 15 Hz 1Hz
25 Hz 25 Hz 15 Hz 1Hz
40 Hz 40 Hz 15 Hz 1Hz
80 Hz 80 Hz 15 Hz 1Hz
100 Hz 100 Hz 150 Hz 10 Hz
200 Hz 200 Hz 150 Hz 10 Hz
500 Hz 500 Hz 150 Hz 10 Hz
1 kHz 1 kHz 150 Hz 10 Hz
2 kHz 2 kHz 150 Hz 10 Hz
5 kHz 5 kHz 150 Hz 10 Hz
10 kHz 10 kHz 150 Hz 10 Hz
20 kHz 20 kHz 150 Hz 10 Hz
50 kHz 50 kHz 150 Hz 10 Hz
100 kHz 100 kHz 150 Hz 10 Hz
200 kHz 200 kHz 150 Hz 10 Hz
500 kHz 500 kHz 150 Hz 10 Hz
3. On the HP 4395A, set the controls as follows (the rst setting in T
able 2-23 ):
Control Settings Key Strokes
Center Frequency: 10 Hz
4
Center
5
,
4
1
5
,
4
0
5
,
4
x1
5
Frequency Span: 10 Hz
4
Span
5
,
4
1
5
,
4
0
5
,
4
x1
5
RBW: 1 Hz
4
Bw/Avg
5
,
N
NNNNNNNNNNNNNNNNNNN
RES BW
,
4
1
5
,
4
x1
5
4. Perform the following steps to measure the frequency response at frequencies
<
1 MHz.
a.
Press
4
Trigger
5
,
NNNNNNNNNNNNNNNNNNNN
SINGLE
to make a sweep.Wait for the completion of the sweep.
b.
Press
4
Search
5
,
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SEARCH: PEAK
to place the marker at the peak of the carrier
.
c. Record the marker reading in the calculation sheet for frequencies
<
1 MHz.
5. Change the function generator frequency, HP 4395A center frequency, span frequency
and RBW in accordance with Table 2-23. Repeat step 4 for each setting:
6. Remove the BNC cable from the R input, and connect it to the A input.
7.
Press
4
Meas
5
,
NNNNN
A
to set the HP 4395A to the A input.
8. Repeat steps 4 through 5 to measure the amplitude frequency response at the A input.
9. Remove the BNC cable from the A input, and connect it to the B input.
10.
Press
4
Meas
5
,
N
NNNN
B
to set the HP 4395A to the B input.
11. Repeat steps 4 through 5 to measure the amplitude frequency response at the A input.
12. Calculate the test results using the equation given in the calculation sheet. Record the
test results in the performance test record.
2-66 Performance Tests
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