Procedure; Figure 2-13 Tam Connector Pin Locations - HP 8560E Service Manual

Adjustment Procedures
8. First LO Distribution Amplifier Adjustment

Procedure

1. Press
cord. Remove the cover and fold down the A15 RF and A14
Frequency Control assemblies.
2. Move the jumper on A2J12 from the WR PROT to the WR ENA
position. The jumper is on the edge of the A2 board assembly and
can be moved without folding the board down.
3. Reconnect the line cord and turn on the spectrum analyzer.
4. Set the HP 8560E/EC controls as follows:
5. On the HP 8560E/EC, press
DATA
6. Use the knob or key pad to enter the value 32. This sets the LO
power to a low level.
7. To set the gate bias, connect the positive lead of the DVM to A14J18
pin 15 and the negative lead to A14J18 pin 6. See
page 92
Figure 2-13 TAM Connector Pin Locations
8. On the HP 8560E/EC, press
9. Note the Gate Bias voltage printed on the A7 LO distribution amp
label. Use the knob or keypad to change the displayed DAC value so
the DVM reading is equal to the label voltage, ±10 mV.
10.To set the low band sense voltage, connect the positive lead of the
DVM to A14J18 pin 13 and the negative lead to A14J18 pin 6.
11.On the HP 8560E/EC press
BAND# 0 will be displayed.
12.Note the Sense voltage printed on the A7 LO distribution amp label.
Use the knob or keypad, and press enter, to change the displayed
DAC value so the DVM reading is equal to the label voltage, ±5 mV.
13.Record the DAC value:
92
to turn the spectrum analyzer off and disconnect the line
LINE
Center frequency ...................................... 1.45 GHz
Span ............................................................. 0 Hz
, , and
LO LEVELS INT LO LEVEL
for a pin location drawing.
, ,
CAL MORE 1 OF 2 SERVICE CAL
.
.
LO GATE LEVEL
. The message DRIVE FOR
INT LO LEVEL
Figure 2-13 on
Chapter 2