Agilent Technologies HP 8566B Spécifications Page 263

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42.
43.
44.
Adjust
A20R25
6.15
GHz
to align nearest comb tooth with center
CRT graticule line.
Key in (RECALL) 4.
Adjust
A20R34
2.3
GHz
to align nearest comb tooth with center
CRT graticule line.
45.
Repeat steps 41 through 44 until no further adjustments are
necessary.
46.
47.
48.
Reconnect cable 8 (grey) to
AllJl
O/
DET OUT. Remove jumpers
from between
A12TP2
and
A12TP3
and between
A20TP5
GND
and
A21TP2.
Connect the oscilloscope channel 1 to
A21TP2.
Key in
C-13.
49.
50.
Adjust
A20R25
6.15
GHz
for oscilloscope indication of 0.0 f0.2
Vdc.
Key in (RECALL) 4.
Adjust
A20R34
2.3
GHz
for oscilloscope indication of 0.0 f0.2
Vdc.
51.
Repeat steps 47 through 50 until no further adjustments are
necessary.
52.
Disconnect the oscilloscope from
A21TP2.
Sweep
Attenuator
53.
Gain
Adjustments
54.
Key in
(jZ?TKj,
m,
[PRESEL
PEAK]=,
(START FREQ) 3928 MHz,
(STOP)
4008 MHz.
Connect synthesized sweeper RF OUTPUT to front-panel RF
INPUT with low-loss microwave test cable. Set synthesized
sweeper for output of 4000.000 MHz at 0
dBm.
55.
Signal should be visible at right side of CRT display. Press
(PEAK SEARCH), MARKER
C-1
to place display marker on
signal peak.
56.
Alternately press (PEAK SEARCH) and adjust
A16R72
GAIN 1
for marker frequency of 4.000 00
GHz
as indicated by display
annotation.
13. Sweep, DAC, and Main Coil Driver Adjustments
Note
If adjustment
A16R72
GAIN 1 has insufficient range, perform
Adjustment Procedure 22, “Analog-To-Digital Converter Adjustments”
to ensure that adjustments
A3ASR6
OFFS and
A3ASR5
GAIN are
properly set (for a 0.00 V dc to 10.00 V dc Scan Ramp). If adjustment
A16R72
GAIN 1 still has insufficient range, check the value of
factory-select precision resistor
A16R46,
which has allowable values
of
74.25K
(HP Part Number 0699-0311) or
73.874K
(HP Part Number
0699-0380).
57. Key in
(
START
FREQ]
3784 MHz,
[sTopFREQ)
4024 MHz.
58. Signal should be visible at right side of CRT display. Press
(PEAK SEARCH), MARKER
(-1
to place display marker on
signal peak.
Adjustments 3-123
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