HP 437B - ANALOG BOARD TROUBLESHOOTING (continued)

HP 437B
Service Sheet BD1
eS eR Ree
Vit ART TUN
=! INT HT AT TTT Ty
Set pla Yt
= L {MT TITY) TI
Fe
ET Va
ile Se PIE
1 ms/DIV
Figure 8-6. A4TP17 Variable Gain Amplifier Waveform
11. Connect the oscilloscope to A4TP4. Verify the signal shown in Figure
8-7. The signal level should be 1.8 times the voltage at A4TP17 p-p,
t0.8V.
1 ms/DIV
Figure 8-7. A4¢TP4 Bandpass Amplifier Waveform
12. Connect the oscilloscope to A4TPS. Verify the signal shown in Figure
8-8. The signal level should be 9 times the voltage at A4TP17 p-p,
+0.4V. Retain the peak voltage reading for steps 13 and L5.
SERVICE 8-35