
13. Line-Related Sidebands Test
Equipment
Spectrum Analyzer
(1ST
LO OUTPUT) . . . . . . . . . . . . . . . . HP
8566A/B
AC Power Source (Option 400 ONLY) . . California Instruments Model
153T
Adapter, Type N (m) to SMA (f) (2 required) . . . . . . . . . .
.1250-1250
Adapter, Type N (f) to BNC (m) . . . . . . . . . . . . . . . . . . . . . 1250-0077
Cable Assembly, SMA Male Connectors . . . . . . . . . . . . . . . .
.5061-1086
Procedure 1.
2.
3.
4.
5.
6.
7.
8.
Allow both analyzers to warm up for at least one-half hour with
LINE switch in either the STANDBY or ON position.
Connect CAL OUTPUT to RF INPUT on one of the analyzers.
Press
C-1
then
m
@
and adjust FREQ ZERO control
for maximum signal amplitude. Repeat this frequency calibration
on the other analyzer. When complete, press
C-22
on each
analyzer.
Connect CAL OUTPUT of source analyzer to RF INPUT of
analyzer under test as shown in Figure 2-24.
Key in the following on the analyzer under test:
[CENTER
FREQUENCY] .....................................
100 MHZ
CFREQUENCY
SPAN)
.........................................
1.2
kHz
Wait for asterisk
(*)
in upper-right of display to disappear.
Press MARKER (PEAK SEARCH],
(jMKR],
(MKR
+
REF
LVL]
and
wait for asterisk
(*)
to disappear. Trace should now be centered
on display.
Press
cm]
(mjG,
SWEEP
m,
(iJ
@J
(J-1
to
initiate video averaging of 10 sweeps.
When VID AVG = 10, press
[SHIFT),
TRACE B
(j-1,
TRACE A
IVIEW).
Press MARKER [PEAK SEARCH) [al and position the marker at the
peaks of the line-related sidebands separated from the signal by
multiples of the line frequency (e.g., 120, 180, 240, 300, 360, 420,
480, and 540 Hz for a 60 Hz line frequency). The fundamental
line frequency cannot be resolved. Refer to Figure 2-25.
2-54
Performance Tests
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