5-8.
YO LOOP ADJUSTMENTS (Cont’d)
IF GAIN ADJUSTMENT
8. Verify that the 50 Ohm load is still connected to W38 at the end that was connected to A49J2.
Disconnect the oscilloscope probe from A48TP1.
9. Connect the Spectrum Analyzer to A48J1.
10. Set the OUT as follows:
a. Press [INSTRPRESET]
b.
Press [CW]then enter [4]
[.]
[5] [GHz]
c. Connect a jumper between A59TP4 and A59TP5. (This disables the UNLK annunciator cir-
cuit.)
11. Set the Sweep Generator as follows:
a. Press [INSTRPRESEST]
b. Press [POWERLEVEL] then enter [3] [dBm]
c. Press [CW]then enter [1] [8] [6] [MHz]
d. Press [SHIFT]then [CW];press [STEP]keys to select
1 kHz resolution.
BOTTOM VIEW
£48
A48
YO LOOP
(Selected
SAMPLER
(Selected Value)
IMPEDANCE
MATCH
Figure 5-19.
Location of VO Loop Adjustments
Adjustments
5-45
Ri
IF GAIN
HP 8340B/41B