HP 8566B Adjustment Manual page 324

2 1. Frequency Response Adjustments
46. On the spectrum analyzer, key in
(
Hz,
CENTER FREQUENCY
47. Connect the DVM to A6AlZTP3 (-9 V), and connect the
DVM ground to A6A12TP2 (YTX COM) in the RF Section. See
Figure 3-90 for the location of A6A12TP3 and A6A12TP2.
Segment frequency breakpoints in all preselected frequency bands
(Bands B, C, D, and E, 2 GHz - 22 GHz).
48. If necessary, readjust 17-turn potentiometer A6A12R113 -9 V
for a DVM indication of -9.000 fO.OO1 Vdc.
49. Connect the DVM to A6A12TP5 (-525 V/GHz). Leave the DVM
ground connected to A6A12TP2 (YTX COM). See Figure 3-90 for
the location of A6A12TP5.
50. Adjust 22-turn (YTX IF Offset) potentiometer A6A12R85 B for a
DVM indication of -2.100 f0.001 Vdc. See Figure 3-90 for the
location of A6A12R85 B.
YTX Linearity adjustments A6AlOR40 LBl, A6AlOR41 LB2,
preselected frequency bands (Bands B, C, D, and E, 2 GHz - 22 GHz).
These adjustments overlap and have a cumulative effect on YTXKI'O
tracking with increasing frequency.
51. If the A6AlO Miscellaneous Bias/Relay Driver Assembly or A6A7
YTX Current Driver Assembly has been repaired or replaced,
or if the A6A8 YTX has been replaced, adjust 22-turn (YTX
Linearity) potentiometers A6AlOR40 LBl, A6AlOR41 LB2,
LR2, A6AlOR37 LR3, and A6AlOR76 LR4 fully counterclockwise.
See Figure 3-90 for the location of YTX Linearity adjustments
LB4, A6AlOR31 LRl, A6A610R34 LR2, A6AlOR37 LR3, and
52. On the spectrum analyzer, key in
controls as follows:
START FREQ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.0 GHz
STOP FREQ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.8 GHz
RES BW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 MHz
REFERENCE LEVEL . . . . . . . . . . . . . . . . . . . . -7 dBm
LOG SCALE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 dB/DIV
SWEEP TIME . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500 ms
53. Connect the equipment as shown in Figure 3-94, with one
resistive output of the power splitter connected to the power
meter/power sensor using an APC 3.5 (m) to Type N (f) adapter,
and the second resistive output connected to the diode detector.
Connect the diode detector SMC output to the synthesized
)
4 GHz, SWEEP @iKZ].
0
)
SPAN
_)
PEAK