Theory of Operation
4–18
1735 HD High Definition Waveform Monitor
Sync Switch (for EXT SYNC).
U1 and Q6 form a non-inverting feedback amplifier
with R14 as the feedback resistor. Input resistors R10 and R11 bias the output to
4 V, and, with the feedback resistor, determine the amplifier gain (approximately
2). Q6 provides a low output impedance for the amplifier. R15 determines the
amplifier bias currents and C7 and R25 provide compensation.
R6, R1, and R7 form a voltage divider that biases the bases of Q2 (at approxi-
mately 4 V) and Q5 (at approximately 2 V).
SYNC (Internal,
External, & Remote)
Diagram <10>
Summary of Contents for 070-8462-03
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