
16.
YTO
Loop Adjustments
41.
All YTO Loop Frequency:
MHz
On the synthesized sweeper, press Icw) and key in the M/N Loop
Frequency from step 40.
42.
43.
Press
@Z?ZiZ)
on the second spectrum analyzer. Connect the CAL
OUTPUT signal on the second spectrum analyzer to the RF INPUT
on the second spectrum analyzer, and press
Cm]
8.
Adjust the AMPTD CAL control on the second spectrum analyzer
for a -10.00
dBm
displayed signal. Then, key in
(2-221,
(SHIFT_)
[FREQUENCY SPAN)
w
on the second spectrum analyzer and wait for
the self-correction routine to complete. Key in
[m)
TRACE A
[MAX)
on the second spectrum analyzer.
44.
Use a second BNC to SMB snap-on test cable to connect the RF
INPUT of the second spectrum analyzer to AllJ5 IF OUT.
45.
Set the controls of the second spectrum analyzer as follows:
START FREQUENCY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.5
MHz
STOP FREQUENCY . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.70
MHz
REFERENCE LEVEL . . . . . . . . . . . . . . . . . . . . . . . . . . . + 10
dBm
LOG SCALE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 dB/DIV
RESOLUTION BW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.300
kHz
46.
The IF OUT fundamental and second harmonics should be visible
at approximately 30 MHz and 60 MHz on the display of the second
spectrum analyzer, as shown in Figure 3-75. Key in MARKER
L-1
30 MHz to position a marker at 30.03 MHz on the display
of the second spectrum analyzer.
START
5 a
MHZ
STOP
70
0
MHZ
RES
BW
300
kHZ
“BW
1
MHZ
SWP
2B.e) nlsec
Figure 3-75.
30 MHz YTO Loop Sampler Response at A 1155 IF OUT
47. On the Spectrum Analyzer (DUT), turn the DATA knob as
necessary to tune the IF OUT fundamental to 30.0 MHz
f
0.5
MHz, as indicated by the marker on the display of the second
spectrum analyzer.
Adjustments 3-143
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