HP 4395A - Page 84

8. Perform the following steps to measure the amplitude delity.
a.
On the HP 4395A, press 4
Search
5 ,
NNNNNNNNNNN
MAX to move the marker to the peak of the carrier.
b. On the signal generator, adjust the amplitude until the HP 4395A marker reads 0 20 dB
6 0.1 dB.
c.
On the HP 4395A, press 4
Trigger
5 ,
N
NNNNNNNNNNNNNNNNNNN
SINGLE to make a sweep.Wait for the completion of
the sweep.
d.
Press 4
Search
5 ,
NNNNNNNNNNN
MAX , 4
Marker
5 ,
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
1MODE MENU ,
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
FIXED 1MKR to place the delta reference
marker on the peak of the carrier (reference level of the amplitude delity).
e. Set the step attenuator to the rst setting 20 dB in the second column of Table 2-19 .
Table 2-19. Amplitude Fidelity Test Settings
dB from
Reference Input Level
Step Attenuator
0 10 dB 20 dB
0 20 dB 30 dB
0 30 dB 40 dB
0 40 dB 50 dB
0 50 dB 60 dB
0 60 dB 70 dB
0 70 dB 80 dB
f. Perform the following steps to measure the amplitude delity
.
i.
Press 4
Trigger
5 ,
NNNNNNNNNNNNNNNNNNNN
SINGLE to make a sweep.Wait for the completion of the sweep.
ii.
Press 4
Search
5 ,
NNNNNNNNNNN
MAX .
iii. Record the delta marker reading in the calculation sheet for the amplitude delity
.
Use the \HP 4395A Reading" column corresponding to the dB from the reference
level in the rst column of Table 2-19.
g. Change the step attenuator setting in accordance with the second column of T
able 2-19.
Then perform step 8-f for each setting.
9. Remove the xed attenuation from the R input, and connect it to the A input.
10.
Press 4
Meas
5 ,
N
NNNN
A to set the HP 4395A to the A input.
11.
Press 4
Scale Ref
5 ,
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
REFERENCE VALUE , 4
-
5 , 4
1
5 , 4
0
5 , 4
x1
5 , 4
Scale Ref
5 ,
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
ATTENUATOR MENU ,
NNNNNNNNNNNNNNNNNNNNNNN
ATTEN A ,
4
1
5 , 4
0
5 , 4
x1
5 , to set the HP 4395A controls to the reference setting for the test.
12. Set the step attenuator to 10 dB.
13. Repeat step 8 to measure the amplitude delity at the HP 4395A A input.
14. Remove the xed attenuation from the A input, and connect it to the B input.
15.
Press 4
Meas
5 ,
NNNNN
B to set the HP 4395A to the B input.
16.
Press 4
Scale Ref
5 ,
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
REFERENCE VALUE , 4
-
5 , 4
1
5 , 4
0
5 , 4
x1
5 , 4
Scale Ref
5 ,
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
ATTENUATOR MENU ,
NNNNNNNNNNNNNNNNNNNNNNN
ATTEN B ,
4
1
5 , 4
0
5 , 4
x1
5 , to set the HP 4395A controls to the reference setting for the test.
17. Set the step attenuator to 10 dB.
18. Repeat step 8 to measure the amplitude delity at the HP 4395A B input.
19. Calculate the test results using the equations given in the calculation sheet. Record the test
results in the performance test record.
2-52 Performance Tests