Wavetek Meterman FG2C Operator's Manual page 7

14 SWEEP/TIME
Control and LIN/LOG Selector:
(1) Rotate the knob clockwise to adjust sweep time for MAX, or counterclockwise for MIN.
(2) Select Linear sweep mode by pushing in the knob or LOG sweep mode by pulling out the knob.
15. MOD ON/off Selector
Press the button once, the indicator will light, and the output will be modulated by internal 400Hz sinewave or press the button
again, the indicator will be off, and the output will be modulated an external signal via VCF/MOD in connector (21) .
16. MOD/DEPTH
SWEEP RATE and AM/FM Selector:
(1) Sweep width can be controlled from 0 to 1000 times.
(2) Adjust modulation ratio by turning the knob clockwise for MAX, or counterclockwise for MIN.
(3) Select AM(amplitude modulation) mode by pushing in the knob or FM(frequency modulation) mode by pulling out the knob.
17 MOD EXT
Selector: Press the button once, the indicator will light, and EXTernal MODulation is selected. Press the button again, the
indicator will be off, and INT MODulation is selected.
FRONT or REAR PANEL
18. INT/EXT Counter Switch
Select internal counter mode (count the frequency of the FG3C output) or select EXT counter mode for an independent counter
(input signal from BNC (19) terminal).
19. EXT. Counter Input Terminal: Accepts external signals for measurement.
20. TTL/CMOS Output Terminal
TTL/CMOS compatible signal output
21. VCF/MOD
Input Terminal: Connector for the input voltage required to perform the "voltage control frequency" operation or the EXT
modulation operation.
22. Main Output Terminal
Main signal output.: The Output signal is calibrated for a 50 Ω load.
23. GCV Output
This is a DC voltage output and its voltage level will follow the change of Frequency.
24. 115/230 Switch This switch selects the mains power voltage.
The functions of items 2, 2a, 3, 4, 5, 6, 14, 15, 16, 17, 18, 19, and 23 do not apply to model FG2C.
USAGE PROCEDURES
The following section describes the basic setup and controls for operating the functions of this instrument.
One of the best ways to observe waveforms is to connect the function generator to an Oscilloscope. Observe the effects that different
controls have on the waveforms displayed on the Oscilloscope when preceding with the following steps:
First-step check:
(1) Ensure that the mains voltage switch (24) on the rear panel of this instrument of is compatible with the mains supply.
Connect the instrument to the mains supply using the power cord supplied.
(2) Press PWR (1) switch, ensure all the rotary knobs are pushed in, and rotate the AMPL (12) knob to fully counterclockwise.
(3) Rotate the FREQ (13) control fully counterclockwise.
Triangle, square, and sine waves
(1) Select the Function (8) , select the Range (7), and rotate the FREQUENCY (13) knob to set the required frequency (read
output in display window (4) ).
(2) Connect the Output 22) terminal to the oscilloscope for observing the waveform signal.
(3) Rotate the AMPL (12) knob to control the waveform amplitude.
(4) If attenuation of the output signal is required, pull out the AMPL (12) knob to obtain 20dB attenuation or press the ATT -20dB
(12a) button for additional 20dB attenuation..
(5) The phase-relation of Output waveform and TTL output is shown in Figure 5 below:
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