HP 4395A - Page 106

5. On the HP 4395A, perform the following steps to measure the spurious level. In each step,
the carrier level is measured rst. Then the spurious level is measured.
a. Set the controls as follows to measure the carries level:
Control Settings Key Strokes
Center Frequency:
276.8666667 MHz
4
Center
5 , 4
2
5 , 4
7
5 , 4
6
5 , 4
.
5 , 4
8
5 , 4
6
5 , 4
6
5 , 4
6
5 , 4
6
5 , 4
6
5 , 4
7
5 ,
4
M/ 
5
Frequency Span: 1 MHz 4
Span
5 , 4
1
5 , 4
M/ 
5
RBW: 3 kHz
4
Bw/Avg
5 ,
NNNNNNNNNNNNNNNNNNNN
RES BW , 4
3
5 , 4
k/m
5
The center frequency is set to the frequency of the signal generator.
b.
Press 4
Trigger
5 ,
NNNNNNNNNNNNNNNNNNNN
SINGLE to make a sweep.Wait for the completion of the sweep.
c.
Press 4
Search
5 ,
NNNNNNNNNNN
MAX , 4
Marker
5 ,
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
1MODE MENU ,
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
FIXED 1MKR to place the delta marker
reference at the peak of the carrier.
d. Set the following controls to the settings listed in Table 2-24 (from the second to the fth
columns):
Control Settings Key Strokes
Center Frequency: 300 MHz 4
Center
5 , 4
3
5 , 4
0
5 , 4
0
5 , 4
M/ 
5
Frequency Span: 17.95 kHz 4
Span
5 , 4
1
5 , 4
7
5 , 4
.
5 , 4
9
5 , 4
5
5 , 4
k/m
5
RBW: 100 Hz
4
Bw/Avg
5 ,
NNNNNNNNNNNNNNNNNNNN
RES BW , 4
1
5 , 4
0
5 , 4
0
5 , 4
x1
5
Video BW: 100 Hz
4
Bw/Avg
5 ,
NNNNNNNNNNNNNNNNNNNNNNNNNN
VIDEO BW , 4
1
5 , 4
0
5 , 4
0
5 , 4
x1
5
e.
Press 4
Trigger
5 ,
NNNNNNNNNNNNNNNNNNNN
SINGLE to make a sweep.Wait for the completion of the sweep.
f.
Press 4
Marker
5 ,
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
1MODE MENU ,
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
1MKR SWP PARAM , 4
3
5 , 4
0
5 , 4
0
5 , 4
M/ 
5 to move the delta
reference marker to the spurious frequency in the seventh column of T
able 2-24.
g. Press 4
Marker
5 , 4
0
5 , 4
x1
5 , to move the delta marker to the spurious frequency
.
h. Record the HP 4395A marker reading in the performance test record (\T
est Result"
column).
6. Change the signal generator and HP 4395A controls in accordance with T
able 2-24. Then
repeat step 4 and 5 for each setting.
2-74 Performance Tests