
1. Low-Voltage Power Supply Adjustments
1.
Low-Voltage
Power
Supply
Adjustments
Reference
IF-Display Section:
AlA
f15
V Regulator
AlA
+ 120 V, +5.2 V Regulator (Serial Number Prefix
3004A
and
above)
AlA
+ 100 V, +5.2 V Regulator (Serial Number Prefix 3001A and
below)
RF Section:
A8 Rectifier
Al7 Positive Regulator
A 18 Negative Regulator
Description
The + 15 Vdc power supply is adjusted for the IF-Display Section, and
the
+22
Vdc and
+20
Vdc power supplies are adjusted for the RF
Section. All other low-voltage supplies are measured to ensure that
they are within tolerance.
Figure 3-1. Low-Voltage Power Supply Adjustments Setup
Equipment
Digital Voltmeter (DVM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 3456A
Adjustments 3-25
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