SECTION I
GENERAL DESCRIPTION
1-1 GENERAL
The Model 206A Low Distortion Audio Signal Generator provides a
precise source of continuously variable audio-frequency voltage
suitable for use in making accurate gain or frequency response
measurements of high-quality audio circuits. Any desired frequency
within a range of 20 to 20,000 cycles /second is made available by
an extremely low-distortion resistance-capacity oscillator within
the instrument.
A voltmeter, calibrated both in volts and dbm, is
provided to measure the output of the oscillator output amplifier.
Following the voltmeter is an attenuator which permits the output
level to be reduced in
.
1 db steps to a maximum of 11 1 db.
A
line-
matching transformer and associated switch permits the signal
generator output to be coupled to a balanced line of 50, 150, or 600
ohms.
An unbalanced 600-ohm output which bypasses the line -match
-
ing transformer also is provided.
The Model 206A is suitable for FM transmitter maintenance, studio
amplifier and console testing, as a low-distortion signal source for
bridge measurements, as
a
transmission-measuring set, and for
any application requiring a low-distortion, accurately-known audio
test signal.
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