HP 4395A - Page 94

Note
Connect the signal generator's 10 MHz frequency reference output to the
HP 4395A EXT REF Input on the rear panel as shown in Figure 2-24. With this
conguration, both the signal generator and the HP 4395A are phase locked to
the same reference frequency to obtain a stable measurement.
Figure 2-24. Frequency Response Test Setup 1
c. Initialize the signal generator. Then set the amplitude to 0 14 dBm.
d.
Press 4
Meas
5 ,
N
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
ANALYZER TYPE ,
N
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SPECTRUM ANALYZER , 4
Preset
5 to initialize the HP 4395A.
Then set the controls as follows:
Control Settings Key Strokes
Frequency Span: 1 kHz 4
Span
5 , 4
1
5 , 4
k/m
5
Reference Level: 0 10 dBm
4
Scale Ref
5 ,
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
REFERENCE VALUE , 4
-
5 , 4
1
5 , 4
0
5 , 4
x1
5
Scale/Division: 1 dB/Div
4
Scale Ref
5 ,
NNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SCALE/DIV , 4
1
5 , 4
x1
5
e.
Press 4
Meas
5 ,
NNNNN
R to set the HP 4395A to the R input.
f.
Press 4
Scale Ref
5 ,
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
ATTENUATOR MENU ,
NNNNNNNNNNNNNNNNNNNNNNN
ATTEN R , 4
1
5 , 4
0
5 , 4
x1
5 to set the input attenuator to
10 dB.
g. Press 4
Bw/Avg
5 ,
NNNNNNNNNNNNNNNNNNNN
RES BW , 4
3
5 , 4
0
5 , 4
0
5 , 4
k/m
5 in the rst column of Table 2-22. Table 2-22 lists
the test settings at frequencies  1 MHz.
h. On the signal generator, set the frequency to the rst frequency 50 MHz in the rst
column of Table 2-22.
2-62 Performance Tests