HP 8340B Manual page 141

5-5. 20130 LOOP PHASE LOCK, A36, A38, A39, A40, AND A43 (Cont'd)
11. Set the LINE switch to STANDBY. Reinstall A41 (PLL2 Phase Detector). Disconnect the Fre-
quency Counter from A40J3 and reconnect the A39W1 cable to A40J3 (.15
~ .1 M Hz) connector.
12. Set the LINE switch to ON. Press [INSTRPRESET].
13. Press [CW] then enter [3] [0] [MHz]to set the N2 oscillator to 150 MHz.
14. Connect the DVM to A43TP5 (VCO TUNE) located on the top cover of A43.
15. Adjust A40R2 (150 MHz) for a DVM indication of ±3.00 Vdc
16. Connect the DVM to A41TP7
17. Adjust A43R9 (.3 MHz) for a DVM indication of +3.50 Vdc
18. Press [CW] then enter [1] [9] [.] [9] [9] [9] [9] [9] [9] [MHz]to set the N2 oscillator to 100 MHz.
19. Connect the DVM to A43TP5 (VCO TUNE) located on the top cover of A43.
20. Adjust A40R4 (100 MHz) for a DVM indication of +15.00 Vdc
21. Connect the OVM to A41TP7
22. Adjust A43R41 (.2 MHz)for a DVM indication of 3.50 Vdc
23. Repeat Steps 12 through 22 until no further adjustment is required.
24. Set the Spectrum Analyzer as follows:
a. Press [INSTR PRESET]
Set CENTER FREQ to 29.5 MHz
b.
c. Set SPAN to 200 kHz
25. Connect jumper between A59TP4 (OLl) and A59TP5 (±5V) to disable the UNLK indicator circuit.
26. Set the OUT as follows:
a. Press [INSTRPRESET]
b. Press [STARTFREQ] then enter [2] [0] [MHz]
c. Press [STOPFREQI then enter [2] [0] [.] [5] [MHz]
d. Press [SHIFT],then [XTAL] (This stops the frequency at end of the sweep without a retrace.)
e. Press [SINGLE]Sweep
27. Disconnect
the cable W39 from A36J1 (OUT 20-30 MHz) and connect the Spectrum Analyzer (RF
INPUT) to A36J1 through an SMB snap-on to BNC cable. Adjust A43R25 (0.5 MHz AF) to center
the signal on the Spectrum Analyzer screen.
28. Set the Spectrum Analyzer as follows:
a. Set CENTER FREQ to 25 MHz
Set SPAN to 500 kHz
b.
5-30 Adjustments
(~
DET OUT) on the top cover of A41.
(~
DET OUT) located on the top cover of A41.
MHz OUT FOR AF
- 6
0.05 Vdc.
±
0.05 Vdc.
±
0.05 Vdc.
±
Vdc.
±0.05
HP 8340B/41B