CONTROLS AND INDICATORS
1. PWR Switch. Turns power on and off.
2. Range Selectors. Selects frequency range. Decade fre-
quency type, seven ranges from 1Hz to 1MHz. Fre-
quency can be adjusted from 0.2 to 2times the range
selected. For example, if the 100 Krange is selected,
frequency can be adjusted (see Frequency Control) from
20 kHz to 200 kHz. Numbers under pushbuttons indicate
gate time (see GATE LED).
3. Function Selectors. Selects square, triangle, or sine
waveform at OUTPUT jack.
4. AMPL Control. Controls amplitude of signal at OUT-
PUT jack. When control is pulled out, signal is attenu-
ated 20 dB (PULL -20dB).
5. OUTPUT Jack. Waveform selected by FUNCTION
switches as well as the superimposed DC OFFSET
voltage is available at this jack.
6. TTL/CMOS. When control is pushed in, aTTL signal is
present at the TTL/CMOS jack. Level is fixed at 3V
p-p and turning control has no effect. When the control
is pulled out (PULL CMOS), aCMOS signal is present at
the TTL/CMOS jack. Turning the control clockwise
increases the amplitude and turning the control coun-
terclockwise decreases amplitude (amplitude is adjust-
able from approximately 4Vp-p to 14.5 Vp-p).
7. TTL/CMOS Jack. Square wave selected by TTL/CMOS
control (either TTL or CMOS) is available at this jack.
The output is independent of the AMPL and OFFSET
controls.
8. OFFSET ControL When control is pushed in, DC offset
is set at zero. When control is pulled out (PULL ADJ),
clockwise rotation changes DC offset in apositive
direction and counterclockwise rotation changes DC
offset is anegative direction. Full clockwise rotation
gives approximately +5 Vinto 50 SI load (+10 Vopen
circuited). Full counterclockwise rotation gives approx-
imately -5 Vinto 50 Qload (-10 Vopen circuit).
9. VCF IN Jack. Voltage Controlled Frequency input.
Permits external sweep or frequency control. Positive
voltage decreases the output frequency.
10. DUTY ControL Rotation adjusts the duty cycle of both
the main OUTPUT signal and the TTL/CMOS signaL
Fully counterclockwise rotation is the CAL position
(normal duty cycle). Duty cycle changes when control is
rotated away from CAL position. When control is pulled
out (PULL INV), the square wave at the main OUTPUT
and the TTL or CMOS signal are inverted.
11. FINE Frequency ControL Vernier adjustment of output
frequency for ease of setting to aprecise frequency.
12. COARSE Frequency ControL Coarse adjustment of
output frequency (main output and TTL/CMOS output)
from .2 to 2times the selected range.
13. Frequency Counter Display. Displays, frequency of
internally generated frequency.
14. Hz and kHz LED. Indicates whether display is showing
Hz or kHz.
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