HP 8340B Manual page 132

5-3. 100 MHz VOLTAGE-CONTROLLED CRYSTAL OSCILLATOR (VCXO),
A30 (Cont'd3
2. Set Spectrum Analyzer controls as follows:
CENTER FREQ
REF LEVEL
ATTEN
LOG SCALE
RES BW
VBW
FREQ SPAN
SWEEP TIME
MARKER ENTRY
MARKER ENTRY
MARKER MODE
100 MHz OUTPUT ADJUSTMENT
3. On the OUT, set LINE switch to ON and press [INSTR PRESET].
4. At rear panel of the OUT, disconnect the 10 MHz Frequency Standard cable at the EXT FRE-
QUENCY STANDARD connector.
5. Adjust the DC power supply for —8.OV, connect the ground lead to ground and the negative lead
to A3OTP1 (TUNE). Connect the DVM to A3OTP1 (TUNE) and verify that TUNE measures —8.OV.
Re-adjust the power supply if necessary.
BOTTOM VIEW
A53
A53TP5
iov
—
A30
(Adj.
locations
labeled on
cover.)
5-20 Adjustments
Figure 5-6. Location of A30 100 MHz VCXO Adjustments
Press SIGNAL TRACK
A30
R69 R67 R68
•
100MHz
3dBm
+20dB
1 dB/DIV
300 Hz
300 Hz
20kHz
1 SEC.
Press PEAK SEARCH
Press MKR CF
—~
TPI
TUNE
Th
I
j
ILLI-
HP 8340B/41B