7
CONTROLS AND INDICATORS
FRONT PANEL
(Refer to Fig. 1)
1.
POWER Switch
. Turns power on and off.
2.
RANGE Switch
. Selects output frequency range. Seven ranges from 1 Hz to 10MHz. Switch indicates maximum frequency of range
and is adjusted with COARSE FREQUENCY control to 0.1 times th e maximum. For example, if the 100 kHz range is selected, the
output frequency can be adjusted from 10kHz to 100kHz.
3.
FUNCTION Switch
. Selects sine, square, or triangle waveform at OUTPUT jack.
4.
OUTPUT LEVEL Control
. Controls the amplitude of the signal at the OUTPUT jack. Output level can be decreased by approximately
20 dB with this control.
5.
DC OFFSET Control
. Enabled by the DC OFFSET Switch (14). Clockwise rotation from center changes the DC offset in a positive
direction while counterclockwise rotation from center changes the DC off set in a negative direction.
6.
OUTPUT Jack
. Waveform selected by FUNCTION switch as well as the superimposed DC OFFSET voltage is available at this jack.
7.
TTL/CMOS Jack
. TTL or CMOS square wave, depending on the position of the CMOS LEVEL switch (15) is output at this jack.
This output is independent of the OUTPUT LEVEL and DC OFFSET controls.
8.
CMOS LEVEL Control
. Rotating this control clockwise increases the amplitude of the CMOS s quare wave at the TTL/CMOS jack.
9.
VCG/SWEEP Jack
. Controlled by SWEEP EXT/INT Switch (12). When SWEEP EXT is selected, jack is the Voltage Controlled
Generator input and permits external control of generator output frequency by a DC voltage input at this jack. A positive vol tage will
decrease frequency.
10.
DUTY CYCLE Control
. Enabled by the DUTY CYCLE Switch (17). Rotation from center position adjusts the duty cycle of the main
OUTPUT signal.
11.
-20 dB Switch
. When engaged, the signal at the OUTPUT jack is attenuated by 20dB.
12.
SWEEP INT/EXT Switch
. When engaged (INT) enables the sweep mode of operation. Sweep rate is controlled by SWEEP TIME control
(18) and sweep magnitude is controlled by the SWEEP WIDTH control (16). When released (EXT), allows external control of generator
output frequency by a DC voltage input at the VCG/SWEEP jack (9).
13.
SWEEP LIN/LOG Switch
. When engaged (LOG) selects logarithmic sweep characteristic and in the released (LIN) position selects a
linear sweep characteristic.
14.
DC OFFSET Switch
. When engaged, enables operation of the DC OFFSET control (5).
15.
CMOS LEVEL
Switch
. When engaged, changes the TTL signal to CMOS signal at the TTL/CMOS jack .
16.
SWEEP WIDTH Control
. Rotation determines sweep width by adjusting sweep stop frequency.
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