Agilent Technologies 4284A Service Manual page 118

These troubleshooting aids provide a list of test points in Table 4-A5-2. T h e test point loca-
tions are shown in Figure 4-A5-1.
Signal Name
Test Point
A5TP1
A5TP2 DI VOUT
A5TP3
A5TP4
A5TP5
A5TP6
A5TP7 ATTDAC
A5TP8
A5TP9
A5TP10
A5TP11
A5TP12
A5TP13
A5TP14
Table 4-A5-2. A5 Test Points List
Crystal oscillator signal
DIV! N
Signal divided the DIV I N signal by N
0° quasi-sine wave signal
QUA ST
901N 90° quasi-sine wave signal
90OUT 90° reference signal (20 Hz to 5 kHz)
ODEG 0° reference phase signal
Output signal from the DAC
ATT Output signal from the attenuator
OUT Output signal to Hcur Terminal
+9 V DC
+9
+5A +5 V DC (A)
-9 V DC
-9
+5 V DC (B)
5B
GND Ground Line
4-A5-2
Description