GW Instek GFG-8217A - Frequency Counter and General Details

FUNCTION GENERATOR -SERIES
INSTRUCTION MANUAL
14
Table 1(for GFG-8215A/8216A/8217A/8219A)
Push bottom 1 10 100 1k 10k 100k 1M
Frequency Range
0.3Hz
∣
3Hz
3Hz
∣
30Hz
30Hz
∣
300Hz
300Hz
∣
3kHz
3kHz
∣
30kHz
30kHz
∣
300kHz
300kHz
∣
3MHz
Table 2(for GFG-8250A/8255A)
Push bottom 1 10 100 1k 10k 100k 1M
Frequency Range
0.5Hz
∣
5Hz
5Hz
∣
50Hz
50Hz
∣
500Hz
500Hz
∣
5kHz
5kHz
∣
50kHz
50kHz
∣
500kHz
500kHz
∣
5MHz
8. Function Selector
Press one of the three push buttons to select the desired
output waveform.
9. Duty Function Pul
l out and rotate the knob to adjust the duty cycle of
the waveform.
10. TTL/CMOS Selector
When push in the knob, the BNC terminal of
20
will
output a TTL compatible waveform. If pull out and
rotate the knob can adjust the CMOS compatible output
(5-15Vpp) from the output of BNC
20
.
11. DC Offset Control
Pull out the knob to select any DC level of the
waveform between ±
10V, turn clockwise to set a
positive DC level
waveform and invert for a negative
DC level waveform.
12. Output Amplitude
Control with
Attenuation
Operation
Turn clockwise for MAX. output and invert for a –
20dB
output. Pull the knob out for an additional 20dB output
attenuation.
FUNCTION GENERATOR -SERIES
INSTRUCTION MANUAL
15
12a. 20dB Attenuation Press the knob to adjust a –20dB output.
13 MANU/SWEEP
Selector and
Frequency
Adjustment
(Sweep On/Off)
Press and turn clockwise the knob for MAX frequency
and invert for MIN frequency. (Keep the 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 t
he knob
position.
14 Sweep Time
Control and
LIN/LOG
Selector
(1)
Rotate the knob clockwise to adjust sweep time for
MAX, or invert for MIN.
(2)
To proceed Linear sweep mode by pushing in the
knob,
or select LOG sweep mode by pulling out the
knob.
15. Control MOD
ON/OFF Selector
Pull out the knob, the output can be modulated by
internal 400Hz Sine wave or an external signal via
CVF/MOD in connector
21
.
16. Sweep Width &
Modulation
Carrier &AM/FM
Selector &FM
Selector
(1) Sweep width can be controlled from 0 to 1000 times.
(2)
To adjust modulation ratio by turning the knob
clockwise for MAX, or invert for MIN.
(3)
Press the knob to get AM function or pull it out for
FM function.
17 INT/EXT MOD
Selector
When press the button once, the indicator will lighten,
then the EXT MO
D has been selected. Press the key
again, the indicator will be off, then INT MOD has been
selected.
18.
INT/EXT Counter
Selector
Select internal counter mode (count the frequency of
model) or select EXT counter mode for an independent
counter (input signal from BNC
19
).
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