Jumper List - Agilent Technologies 4284A Service Manual

These troubleshooting aids provide a list of jumpers and test points. The j u m pers are listed
in Table 4-A2-2 , and the test pOints are listed in Table 4-A2-3. The test point locations are
shown in Figure 4-A2-1 .
Reference
Description
Designator
A2J4 0 0 I ntegrator Output
Selection
A2J 5 90 0 I ntegrator Output
Selection
A2J201 Zero Offset Adjustments
A2J202 Jumpers
A2J203
A2J301
A2J302
A2J303
Test Point Signal Name
A2TP1
A2TP2
A2TP3
A2TP4
A2TP5
A2TP6
A2TP7
A2TP8
A2TP9
·A2TP 1 0
A2TP 1 1
A2TP 1 2
A2TP1 3
A2TP 1 4
N ULLOUT
Table 4-A2-2. J u mper List
Table 4-A2-3. A2 Test Points
C N D
UNBA L
X30
CND
NULL
-8
+8
ODEC
90DEC
-12
CND
MOD
CND
4-A2-2
Use
Normal Position:
Connects the 0 0
signal to the modulator.
Test Position:
Connects -8 V DC to the modulator.
Normal Position:
Connects the 90 0
signal to the modulator.
Test Position:
Connects -8 V DC to the modulator.
These jumpers are used for
Adjustments.
(Refer to S ECTION 2 .)
Description
Ground Line
U N BALA N C E Detector Signal
Signal m u ltiplied I -V
signal by 30
Ground Line
Null Detector Signal
-8 V DC
+8 V DC
0 0 reference signal
90 0 reference signal
-1 2 V DC
Ground Line
Modulator Output Signal
Ground Line
Normalized Output Signal from the sum-
ming ampl ifier
i ntegrator output
i ntegrator output
converter output