Amprobe FG2C-UA, User Manual

Page: 12 / 18

6
(Sweep On/Off): Turn clockwise the knob clockwise for MAX frequency and counterclockwise for MIN
frequency. (Keep the knob pointer within the scale range on the panel). Pull out the knob to start the auto
sweep operation; the upper frequency limit is determined by the knob position.
14 SWEEP TIME (FG3C-UA)
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 (FG3C-UA)
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 (FG3C-UA)
SWEEP RATE and AM/FM Selector:
(1) Sweep width can be controlled from 0 to 100 ratio.
(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 (FG3C-UA)
Selector: Press the button once, the indicator will light, and EXTernal MODulation is selected. Press the button
again, the indicator will be off, and internal MODulation is selected.
18. INT/EXT Counter Switch (FG3C-UA)
Select internal counter mode (count the frequency of the FG3C-UA output) or select EXT counter mode for an
independent counter (input signal from
BNC (19) termina l).
19. EXT. Counter Input Terminal (FG3C-UA)
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 (FG3C-UA)
This is a DC voltage output that flows the output frequency of each range. Minimum (~ 0 VDC) to maximum
(~ +2 VDC)
24. 115/230 Switch
This switch selects the mains power voltage.
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 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.