Location Of A4A4 21.4 Mhz Lc Filter Adjustments - HP 8566B Adjustment Manual

8. 21.4 MHz Bandwidth Filter Adjustments
Digital Voltmeter (DVM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 3456A
10 dB Step Attenuator . . . . . . . . . . . . . . . . . . . . . . . HP 355D, Option H89
1 dB Step Attenuator . . . . . . . . . . . . . . . . . HP 3556, Option H25
Crystal Filter Bypass Network
1. Position the spectrum analyzer upright as shown in Figure
Figure 3-40 and remove the IF-Display Section cover.
2. Set the spectrum analyzer LINE switch to ON and press @Y??iQ.
3. Connect DVM to A4A5TPl(+ 10 VF).
4. DVM indication should be between +9.0 V dc and + 10.0 V dc. If
voltage is not within tolerance, perform Adjustment Procedure 10,
"Step Gain and 18.4 MHz Local Oscillator Adjustments," before
continuing.
5. Connect spectrum analyzer CAL OUTPUT to RF INPUT through 1
attenuators to 0 dB.
6. Disconnect cable 97 (white/violet) from A4A8Jl and connect to
cable A4A6J 1.
(
7. Key in 100 MHz, CREs] 100 kHz,
CENTER
) 200 kHz, and press LIN pushbutton.
SPAN
[
8. Press
REFERENCE
peak approximately 2 divisions down from top CRT graticule line.
9. Adjust A4A4C67 LC CTR and A4A4C19 LC CTR for maximum
MARKER level as indicated by CRT annotation. See Figure 3-41
for location of adjustments. If unable to adjust LC CTR
adjustments for satisfactory signal amplitude, increase or decrease
value of A4A4C17 and A4A4C70. Refer to Table 3-3 for range of
values.

Location of A4A4 21.4 MHz LC Filter Adjustments

10. Key in (RESBW) 1 MHz, and (SPAN) 2 MHz, MARKER
MARKER a.
. . Refer to Figure 3-109
and adjust front-panel knob to set signal
Figure 3-41.
( ),
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Adjustments 3-93