Location Of Track And Hold Adjustments - HP 8568B Performance Tests And Adjustments Manual

AS ~EOM4LR ES
C A L A D J
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Figure 3-88. Location of Track and Hold Adjustments
10. Key in m TRACE A [-HOLD]. b
11. Adjust A3A9R44 OFFS POS until MARKER A level indication as
indicated by CRT annotation flickers back and forth between .OO
and .lO dB.
12. Key in cm) TRACE A m d.
13. Adjust A3A9R36 OFS NEG until MARKER A level indication as
indicated by CRT annotation flickers back and forth between .OO
and . 10 dB.
14. Key in ISHIFT) TRACE A [m) e.
15. Remove short from between A3A9TPl and A3A9TP3 or remove
the SMB short from A3A9Jl. Reconnect cable 7 (violet) to
16. Connect the DVM to A4AlTP3. Connect DVM's ground to the IF
section's casting.
17. Press
[
REFERENCE LEVEL
AMPTD CAL adjust for a DVM indication of +2.000 fO.OO1 V dc
at A4AlTP3.
18. Disconnect DVM from instrument.
19. Key in Cm), TRACE A
MARKER In], SWEEP [CONT).
20. Adjust A3A9R57 T/H GAIN for GAIN for MARKER A level
indication as indicated by CRT annotation of 100 *O.l dB.
2 1. Key in @?i) TRACE A [MAX) b.
22. Adjust A3A9R39 GPOS for MARKER A level indication as
indicated by CRT annotation of 100 fO.l dB.
23. Key in [SHIFT) TRACE A (VIEW) d.
24. Track and Hold Adjustments
' L E R M A T C H
and adjust DATA knob and front-panel
]
MARKER L-1,
( - ],
CLEAR WRITE
C A L O U T P U T
Adjustments 3-143