HP 8566B Adjustment Manual page 219

The adjustment ranges of A4A7C13 PK, A4A7C22 PK, A4A7C31
PK, and A4A7C40 PK are all indirectly affected by factory-select
components A4A7C93 and A4A7C5. A4A7C93 and A4A7C5 set the
peak frequency for the first 3 MHz filter pole, setting the reference for
peaking the amplitudes of the remaining 4 poles. In the following
steps, decrease or increase the value of A4A7C93 and A4A7C5 as
necessary only if adjustments A4A7C13 PK, A4A7C22 PK, A4A7C31
PK, and A4A7C40 PK are all near
range (fully meshed, maximum capacitance, or unmeshed, minimum
capacitance). If the adjustable capacitors are fully meshed, decrease
the value of A4A7C93.
18. Press @?ZZiQ
[ ]
19. Key in 20
SWEEP TIME
( ] -20 dBm.
REFERENCE LEVEL
20. Set the frequency synthesizer for 21.400 MHz at an amplitude
level of -25.0 dBm.
21. Disconnect cable 97 (white/violet) from A4A8Jl and connect
output of the frequency synthesizer to A4A8Jl using BNC to SMB
snap-on cable.
2 2
Set the oscilloscope following Settings:
Press ICHANl
Channel 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .on
probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1O:l
amplitude scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50 mV/div
coupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..ac
Channel 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . on
probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1O:l
amplitude scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50 mV/div
coupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..ac
Press m
EDGE TRIGGER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . auto, edge
source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..Channell
P r e s s ( T I M E )
time scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200 ns/div
Press (DISPLAY)
connect dots . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..on
Press (SHOWI)
23. Connect the oscilloscope channel 1 probe to A4A7TP7 (left side of
Cl4 SYM) and the channel 4 probe to A4A7TP5 (left side of C23
24. Adjust the frequency synthesizer output frequency for maximum
peak-to-peak signal on
25. Adjust A4A7C13 PK for maximum peak-to-peak signal on channel
4 display. See Figure 3-39 for location of adjustment. If unable to
achieve 1 "peak" in signal amplitude, increase or decrease value
of A4A7C12. Refer to 'Ihble 3-3 for range of values.
7. 3 MHz Bandwidth Filter Adjustments
the
same end of their adjustment
[ )
ms, 0 Hz, @iZZZ@ 10 Hz,
FREQUENCY SPAN
the oscilloscope channel 1 display.
Adjustments 3-79