Theory of Operation
1735 HD High Definition Waveform Monitor
4–29
The rectified, clipped sine wave is the CRT control grid bias voltage. C8 is a
speedup capacitor for the fast transitions of the blanking signal, from the Z-axis
amplifier. DS1 and DS2, and DS4 limit the CRT grid to cathode voltage at
instrument turn on and off.
Z-Axis Amplifier.
This is a high gain inverting amplifier with feedback. R5
stabilizes the gain at a low value. The input is the summing junction at pin1 of
J5, which is set to +5 V by R6 and R18, so that the Z-axis control circuit on the
Main circuit board (A3) can drive this amplifier. When there is no input current
from the Z-axis control, the output is set to +10 V by R11. When there is input
current, the output is driven more positive. Q3 is an emitter follower that drives
Q4, which with Q6 forms a cascade pair for good high frequency performance.
Q5 is a constant current source that is the collector load for Q6. The collector of
Q6 is the output of the Z-axis amplifier. C12 speeds up the constant current
source, Q5, for the fast transitions of the blanking pulses. DS5 and DS3 are neon
bulbs intended to prevent damage to the Z-axis amplifier if there is a CRT high
voltage discharge.
Summary of Contents for 070-8462-03
Page 5: ......
Page 13: ...Table of Contents viii 1735 HD High Definition Waveform Monitor...
Page 19: ...Preface xiv 1735 HD High Definition Waveform Monitor...
Page 20: ...Getting Started...
Page 21: ......
Page 35: ...Installation 1 14 1735 HD High Definition Waveform Monitor...
Page 36: ...Operating Basics...
Page 37: ......
Page 63: ...Operating Basics 2 26 1735 HD High Definition Waveform Monitor...
Page 64: ...Specifications...
Page 65: ......
Page 75: ...Specifications 3 10 1735 HD High Definition Waveform Monitor...
Page 77: ......
Page 78: ...Theory of Operation...
Page 79: ......
Page 109: ...Theory of Operation 4 30 1735 HD High Definition Waveform Monitor...
Page 110: ...Performance Verification...
Page 111: ......
Page 134: ...Adjustment Procedure...
Page 135: ......
Page 158: ...Maintenance...
Page 159: ......
Page 163: ...Preventive Maintenance 7 4 1735 HD High Definition Waveform Monitor...
Page 179: ...Corrective Maintenance 7 20 1735 HD High Definition Waveform Monitor...
Page 181: ...Repackaging 7 22 1735 HD High Definition Waveform Monitor Figure 7 10 Repackaging...
Page 182: ...Replaceable Electrical Parts...
Page 183: ......
Page 252: ...Diagrams...
Page 253: ......
Page 256: ...Replaceable Mechanical Parts...
Page 257: ......
Page 265: ...Replaceable Mechanical Parts 10 8 1735 HD High Definition Waveform Monitor...
Page 266: ...Appendices...
Page 267: ......
Page 270: ......
Page 271: ......