HP 8562E, Service Manual

Page: 86 / 482

9. Adjustment
14. Add 67 to the 10 MHz RF gain DAC value and record as the 2 MHz RF gain DAC value.
2 MHz RF gain DAC value
15. Add 62 to the 10 MHz RF gain DAC value and record as the 6 MHz RF gain DAC value.
6 MHz RF gain DAC value
16. Press until 2 MHz is displayed in the active function block. Use the DATA keys to
enter the 2 MHz RF gain DAC value recorded in step 14.
17. Press until 6 MHz is displayed in the active function block. Use the DATA keys to
enter the 6 MHz RF gain DAC value recorded in step 15.
18. Press NEXT on the HP 85623.
19. Disconnect the HP 8482A and its adapter from the HP 11667B. Connect the HP 8485A
to the HP 8902A. Zero and calibrate the HP 8485A combination. Connect the
HP 8485A to the HP 11667B power splitter.
20. Enter the appropriate power sensor calibration factor into the HP 8902A.
21. Set the HP output to the frequency indicated in the active function area of
the HP 85623 display.
22. Adjust the HP POWER LEVEL to place the signal midscreen on the HP 85623
display.
23. On the HP 85623, press PRESEL AUTO
24. Adjust the HP POWER LEVEL for a -10 reading on the HP
25. On the HP 85623, adjust the RF gain DAC value using the knob or keypad until the
marker reads -10 fO.10
26. On the HP 85623, press to proceed to the next frequency.
27. Repeat steps 20 through 26 for the remaining frequencies in band 1.
28. On the HP 85623, press NEXT BAND to proceed to band 2.
29. Repeat steps 20 through 26 for the remaining frequencies in band 2.
Press STORE DATA YES on the HP 85623.
31. Place the WR PROT/WR jumper on the A2 controller assembly in the WR PROT
position.
2-46 Adjustment Procedures