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Number
16
+5V on CPU
17
+12V Flash Voltage
18
CPU Temp
Service Utilities Menu 2
: Allows manual adjustment of the Automatic Level Control (ALC) DAC, which
ALC DAC
controls the source output (\RF OU " connector) power level. Disables the ALC power
calibration until a power level is entered using the Power menu.
: Allows manual control of the internal step attenuator, if one is installed.
Attenuator
: Allows manual adjustment of the DAC which controls the LO output
LO Power Adjust
power. he LO DAC is used by the HP 8711C/12C/30A receiver board only.
Detector Zero DACs
: FOR FAC ORY USE ONLY.
Ext Det Info
: FOR FAC ORY USE ONLY.
Bandcross ON off
: Leads to the Service Utilities Menu 3.
Next Menu
Service Utilities Menu 3
Freq Annot Use Percnt
Inst tate Utilities
Adj Limits ON off
Table 5-4. Analog Bus Nodes (continued)
Name
A2 CPU Assembly Nodes
+5V power supply on the CPU board. Normal values are 4.5 to 5.5
volts.
+12V Vpp supply for writing to the
ash EPROM on the CPU board.
This voltage is normally OFF, so the value should be less than 2.5V.
The \on" voltage level is checked during the power-up tests, and an
error message is displayed if the level is incorrect.
Temperature sensor on CPU board (CPU TEMP on the schematic).
Typical values are 30 to 60 Celsius; this will depend partly on the
ambient temperature.
: FOR FAC ORY USE ONLY.
: FOR SERVICE USE ONLY.
: FOR SERVICE USE ONLY.
: FOR FAC ORY USE ONLY.
escription
Serv ce Related Menus
5-11
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