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Installation and Calibration
24
6. Set the output of the synthesized sweeper to 70 MHz
at a power level of 7 dBm. Set the sweeper for a
6
span of at least
25 MHz (you may set a start and
stop sweep frequency instead of center frequency and
span).
7. Set the range for the spectrum analyzer from 35
MHz to 105 MHz. You should be able to observe a
20 dB notch at 70 MHz.
8. Check the Notch Frequency Sweep function.
a. Press
4
SET START
b. Press
4
5 4
5 4
5 4
4
6
.
c. Press
4
5
SET STOP
d. Press
4
5 4
5 4
5 4
9
4
.
e. Press
, then press
4
5
SHIFT
FREQ).
f. The sweep time preset value is 5 seconds. You
should be able to view the sweep taking place at
this rate.
9. Check the Notch Depth Sweep function.
a. Press
4
SET START
b. Press
4
5 4
5 4
0
ENTER
c. Press
4
5
SET STOP
d. Press
4
5 4
5 4
5 4
3
0
.
e. Press
and
4
5
SHIFT
f. You will see the Notch Depth and Notch
Frequency sweep at the same time. If you wish
to see just the Notch Depth sweeping, press
4
5 4
SHIFT
NOTCH FREQ
Frequency Sweep.
10. Check attenuation.
a. Press
4
5
ATTEN
b. Press
4
5 4
5 4
5 4
2
0
.
c. You will see the
at fade attenuation of 20 dB on
the spectrum analyzer.
d. To sweep attenuation press
, then press
5
4
NOTCH FREQ
and
.
5
4
5
0
ENTER
, then press
4
NOTCH FREQ
5 4
5 4
5 4
0
ENTER
SHIFT
ENTER
4
5
NOTCH FREQ
and
5
4
5
NOTCH DEPTH
(EXIT)
5 4
5
SHIFT
ENTER
and
4
5
NOTCH DEPTH
5 4
5 4
5 4
0
ENTER
SHIFT
ENTER
4
5
NOTCH DEPTH
. This will turn o the Notch
5
and
5
4
5
0
ENTER
4
5 4
SET START
HP 11757B
.
5
.
5
(EXIT).
5
(SWP
5
5
ATTEN
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