Amprobe FG2C-UA FG3C-UA - Manual (Page 11)

5
CONTROL DESCRIPTIONS
Front and Rear Panel
1. Power Switch
Applies line power to the FG2C-UA/FG3C-UA power supply.
2. Gate Interval Indicator (FG3C-UA)
Gate interval indicator (the gate interval of internal counter is 0.01 second).
2a. Gate Time Selector (FG3C-UA)
Press this button to change gate time when use EXTernal counter mode. The sequence is 0.01s, 0.1s, 1s, or 10s
selected by pressing this button.
3. Over Range Indicator (FG3C-UA)
In the external counter mode, the indicator is illuminated when the output frequency is greater than the
range selected.
4. Counter Display (FG3C-UA)
Shows the external frequency via a 6 digit green display, and the internal frequency via a 5 digit green
display.
5. Frequency Indicator (FG3C-UA)
Indicates the current frequency value multiplier.
6. Gate Time Indicator (FG3C-UA)
Flashes at the beginning of each gating interval.
7. Frequency Range Selector
Select the required frequency range by pressing the relevant push button on the panel as shown in Table 1 .
Table 1.
Push Button Frequency Range
1 0.3Hz to 3Hz
10 3Hz to 30Hz
100 30Hz to 300Hz
1k 300Hz to 3kHz
10k 3kHz to 30kHz
100k 30kHz to 300kHz
1M 300kHz to 3MHz
8. Function Selector
Press one of the three push buttons to select the desired output waveform.
9. Duty Function
Pull out and rotate the knob to adjust the duty cycle of the waveform.
10. TTL/CMOS Selector
When the knob is in, the BNC terminal (20) will output a TTL compatible waveform. If the knob is out,
rotating the knob will adjust the CMOS compatible output (5 -15Vpp) at the BNC (20) terminal .
11. DC Offset Control
Pull out the knob to select any DC level of the waveform between ±10V., turn the knob clockwise to select a
positive DC offset level of the waveform and counterclockwise for a negative DC offset level of the waveform.
12. Output Amplitude Control with Attenuation Operation
Turn clockwise for MAX output and counterclockwise for MIN output. Pull the knob out for additional 20dB
output attenuation.
12a. 20dB Attenuation
Press the button to reduce the output by 20dB .
13 FREQ/SWEEP (SWEEP FG3C-UA)
Selector and Frequency Adjustment