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3.1
CONTROLS AND CONNECTIONS
The
generator
front
panel
controls
and
connectors
are
shown in figure 3-1 and keyed to the following descriptions.
0
@
POWER Switch
Turns generator on and off.
Frequency Dial
Settings under the dial index mark multiplied by
determine the output signal frequency. The
frequency can be varied by the vernier
(14)
and
the VCG signal
(3
GENERATOR MODE Switch
Selects one of the following three modes.
SECTION
OPERATION
CONT
— Continuous output at FUNCTION
OUT,
and SYNC OUT connectors.
TRIG — DC level output at both output connectors
until the generator is triggered by MANUAL
TRIG-
GER switch or with a signal at the TRIG
IN con-
nector.
When
triggered,
the generator
output
is
one cycle of waveform or one pulse period followed
by a dc level.
GATE
- As for TRIG except the output is contin-
uous for the duration of the trigger signal at TRIG
IN. The last cycle or period started is completed.
TRIGGER LEVEL Control
Determines
the level at which
the input trigger
signal at the TRIG
IN connector
is accepted
O
@
FREQUENCY
MULT (Hz)
MANUAL
MODEL 143
20 MHz FUNCTION GENERATOR
TRIGGER
(9
ATTENUATION (dB)
VERNIER ©
Figure 3-1. Controls and Connectors
3-1
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