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1
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For AM modulation, the demodulated audio dis-
played on CRT wi 11 read twice the percentage
of modulation.
4-8-4
RESIDUAL DISTORTION
The "RESID" position of the VERTICAL Attenuator Selector Control (24)
allows the display of the residual distortion or noise of the UUT, as
received at the EXT MOD/SINAD Connector (15).
The "RESID" position is
only valid when the Modulation METER Control (4) is in "SINAD'' or "DIST"
position.
4-8-5
TONE GENERATOR
The "TONE" position of the HORIZONTAL Sweep Selector Control
(26)
applies the output of the Programmable and/or Fixed
(1
kHz) Tone
Generators to the horizontal deflection circuits of the CRT.
This func-
tion is useful for measuring the frequency of demodulated audio or
externally applied audio signals, using the Lissajou method of frequency
comparison.
4-46
05
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