UNISource Corporation FG-8102, Operation Manual

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A. Using the square wave generator or pulse generator modes, clock pulses
can be generated for testing, troubleshooting or circuit analysis. The
instrument could even be used as a substitute master clock generator as
TTL/CMOS circuits can be driven from the TTL/CMOS BNC.
B. The CMOS Level Control potentiometer (pull out position) provides CMOS
level output from 5V to 15V Variable and Continuously. For TTL/CMOS
output level, Rotate the potentiometer switch and Observe the TTL or CMOS
output : Push-in is TTL, Pull-out is CMOS.
3-5-2. TTL/SYNC OUTPUT(FG-8105/FG-8110 only)
TTL/SYNC output is specifically designed for compatibility with TTL SYNC digital
logic circuits. Set-up time is considerably reduced because the fixed logic levels
and polarity are ready for direct injection into TTL SYNC circuits. there is a need for
protection from accidental Application of too high amplitude or incorrect DC offset
which might damage semiconductors. Another advantage is the extremely fast rise
time and fall time of signal. To use the TTL SYNC output, connect a cable from
TTL SYNC BNC on the Front panel to the point at which it is desired to inject the
signal. TTL SYNC output may be used in several modes of operation. Some
examples follow.
A. Using the square wave generator or pulse generator modes, clock pulses
can be generated for testing, troubleshooting or circuit analysis. The
instrument could even be used as a substitute master clock generator as
TTL SYNC circuits can be driven from the TTL SYNC BNC.
3-6. Use As FM Signal Generator
1) Procedure
A. Set up equipment as described for function generator operation. Use the
frequency and amplitude controls to set the carrier to the desired frequency
and amplitude.
B. Connect an AC modulating signal with no DC component to the VCF IN BNC
on the front panel of generator.
C. Adjust amplitude of the AC modulating signal for the desired frequency
deviation.