HP 8559A Operation And Service Manual page 141

MODEL 8559A
5-23. RF GAIN ADJUSTMENT (Cont'd)
To make special extender board, solder 51.1 ohm resistor from pin 18 to pin
22 of standard 24 pin extender board, HP Part No. 5060-0258. Leave resistor
leads long for easy connection of clip leads.
PROCEDURE:
1. Set spectrum analyzer controls as follows:
FREQ SPAN/DIV
RESOLUTIONBW
INPUTATTEN
REFLEVELFINE
SWEEP TIMWDIV
SWEEPTRIGGER
VIDEOFILTER
2. Connect equipment as shown in Figure 5-9. Resistor on extender board should be toward rear of
3. Set signal generator frequency to 21.4 MHz. Set output level for approximately
To remove Third Converter Assembly A10, i t will be necessary to disconnect
4. Connect output of signal generator across 51.1 ohm resistor on special board using BNC to clip-lead
adapter. The red lead (center conductor) should be connected to pin 18 of extender board.
5. Set signal generator frequency for peak amplitude on CRT display. Connect output of signal generator to
power meter through a power sensor and set output level to
to clip-lead adapter.
6 . Adjust A12R5 GAIN adjustment for signal one division from top graticule line. DVM should indicate
+
700 mV 30 mV. Remove special extender board and replace Third Converter Assembly A10.
If step gain adjustments will be performed next, do not reconnect A1OW1 to
ADJUSTMENTS
NOTE
NOTE
3 dBm. Reconnect signal generator output
-
NOTE
ADJUSTMENTS
-10
LIN
AUTO
MIN
HP
5 dBm.
-