Theory of Operation
4–12
1735 HD High Definition Waveform Monitor
Series Pass Regulators.
The + and supplies generated on the Power Supply
circuit board are further regulated here. To meet the on-board needs of the
1735 HD Main (A3) circuit board,
±
10 V,
±
8 V, and 5 V are provided. The
regulators are U1 and U11 (+10 V and 10 V supplies), U2 and U13 (+8 V and
–8 V supplies), and U12 (–5 V supply).
Microprocessor-generated control signals are represented in a simplified form on
the Main Block Diagram, located in the fold-out section at the rear of the
manual. The Block Diagram signal names are shown, along with their actual
schematic diagram equivalents, in Table 4–1.
Table 4–1: Control signals grouped by function
Block diagram
e p
i g
hema i
Circuit block
Control signal
Corresponding schematic
diagram signal names
INPUT
MODE
/GND
DCBLOCKEN
CLAMPFAST
INPUT
CLAMP
CLAMPEN
CLAMPULSE
SYNC SWITCH
SYNC SELECT
EXTSEL
REF1A
CH 1B INVERT
SUBTRACT CH 1B
NEG1B
VIDEO SWITCH
CHANNEL SELECT
VMUX0
VMUX1
VMUX2
FILTER SWITCH
FILTER SELECT
FILTER0
FILTER1
VERTICAL LEVEL SHIFT
OFFSET SELECT
BOFFSEL
2OFFSEL
3OFFSEL
VERTICAL LIMITER
V MAG
VERT5X
VERTICAL DEFLECTION
VERT READOUT
ROEN
ROVERT
SWEEP GENERATOR
SWEEP TIMING
RX
RCK
SRCLK
/SWPGATE
FLDRATE
HORIZONTAL LIMITER
H MAG
HMAG1
HMAG2
HMAG3
HORIZONTAL DEFLECTION
HORIZONTAL READOUT
ROEN
ROHORIZ
Summary of Contents for 070-8462-03
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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...
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Page 35: ...Installation 1 14 1735 HD High Definition Waveform Monitor...
Page 36: ...Operating Basics...
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Page 63: ...Operating Basics 2 26 1735 HD High Definition Waveform Monitor...
Page 64: ...Specifications...
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Page 78: ...Theory of Operation...
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Page 110: ...Performance Verification...
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Page 158: ...Maintenance...
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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...
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