GW Instek GFG-8200A Series User Manual
Page 9
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 the 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
VCF/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 MOD 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
).
FUNCTION GENERATOR-SERIES
INSTRUCTION MANUAL
16
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
Used to connect the input voltage required to perform
the “voltage control frequency” operation or the EXT
modulation operation.
22.
Main Output
Terminal
Main signal output.
23.
GCV Output
This is DC voltage output and its voltage amount will
follow the change of Frequency.
24.
Power Switch
115V and 230V selectable.
z Remark:
(1) The functions of item 2, 2a, 3, 4, 5, 6, 14, 15, 16, 17, 19 and 23 can
not be applied to model GFG-8215A.
(2) The functions of item 14, 15, 16, 17 and 23 can not be applied to
GFG-8216A, and GFG-8250A.
(3) The function of item 15, 16-2, 16-3, 17 and 23 can not be applied to
GFG-8217A.
(4) The function of item 20 for GFG-8216A/8250A can be selected
from front panel.
(5) The function of item 20 and 21 for GFG-8215A can be selected
from front panel.