Agilent Technologies HP 8566B Spécifications Page 267

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Vue de la page 266
14. 100
MFIz
VCXO Adjustments
short BNC jumper cable W15 is connected between
52
FREQ
REFERENCE EXT and
53
FREQ REFERENCE INT.
3. Set the dc power supply for an output of -8 Vdc. Connect the -8
Vdc output of the dc power supply to the
A7A2TPl
TUNE test
point. Refer to Figure 3-65 for the location of the
A7A2
100 MHz
VCXO Assembly and test point A7A2TPl TUNE.
A7A2
100 MHZ
vcxo
(Adlustment
locations
lobled
9”
cover)
TOP VIEW
A7A2
Figure 3-65. Location of 100 MHz VCXO Adjustments
4. Disconnect the cable 83 (gray/orange) from
A7A2J2
100 MHz OUT,
and connect the RF INPUT of the second spectrum analyzer to
A7A2J2
using a BNC to SMB snap-on test cable.
5. Press
(2--22GHz)
on the second spectrum analyzer, and then set the
controls as follows:
CENTER FREQUENCY . . . . . . . . . . . . . . . . . . . . . . . . . . 100 MHz
FREQUENCY SPAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.3
kHz
REFERENCE LEVEL
. . . . . . . . . . . . . . . . . . . . . . . . . . .
+3
dBm
RES BW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
kHz
LOG SCALE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 dB/div
TRACE A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CLEAR-WRITE
TRACE B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . MAX HOLD
6. Adjust
A7A2C4
100 MHz slowly through its full range while
monitoring the display of the second spectrum analyzer.
A7A2C4
100 MHz should provide enough adjustment range to shift the
frequency of the 100 MHz VCXO a minimum of
f300
Hz from 100
MHz (99.999700 MHz to 100.000300 MHz), and the output power
should not vary by more than 1
dB
within this range, as shown in
Figure 3-66.
Adjustments 3-127
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