HP 83751A - Page 83

I
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Front/Rear Panel
Connectors
MOD SENSE
L MOD RF OFF
EXT LVL RET
EXT LVL
0.5V/GHz
-15v
+15v
+8V
+5v
Source module sense. A 1 mA current is injected on this line
by the millimeter source module to indicate its presence.
This signal always equals 0 V.
Low = RF off. Source module RF is turned off.
Source module external leveling return.
Source module external leveling input, from the millimeter
source module.
Internal 0.5V/GHz to the millimeter source module.
Power supply. Range is -14.25 to -15.45 V.
(See note below.)
Power supply. Range is + 14.25 to + 15.45 V.
(See note below.)
Power supply. Range is +7.50 to +8.45 V. (See note below.)
Power supply. Range is +4.75 to +5.40 V. (See note below.)
NOTE
The values for the four power supplies above are valid when a millimeter head is connected. With no
load on the connector, the values would be:
- 15 v supply:
-14.4 to -15.45 v
+ 15 v supply:
+14.4 v to +15.45 v
+ 8 v supply:
+7.75 v to +a.45 v
+ 5 v supply:
+4.75 v to +5.40 v
DIG GND
Digital ground.
.5 V/GHz RTN 0.5 V/GHz return.
ANLG GND Analog ground return.
RET
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