Kenwood FG-273 User manual

FUNCTION GENERATOR
KENWOOD CORPORATION

2
WARNING
The following instructions are for use by qualified personnel only. To avoid electric shock,
do not perform any servicing other than contained in the operating instructions unless
you are qualified to do so.
CONTENTS
SPECIFICATIONS ................................................................................................... 3
SAFETY
................................................................................................................ 5
ADJUSTMENT ....................................................................................................... 6
PARTS LIST ........................................................................................................... 8
SCHEMATIC DIAGRAM ........................................................................................... 11
P.C. BOARD
.......................................................................................................... 14

SPECIFICATIONS
Frequency Characteristics
Outputs
Sine, square, triangle, pulse, ramp, TTL/CMOS square wave
Frequency range
0.02 Hz to 2 MHz in 7 frequency ranges ( 1/10/100/1 k/1 Ok/1 OOk/1 M)
Accuracy (1) ±1
digit, 4-digit max. (digital readout to output frequency)
Accuracy (2) ± 5% of full scale (0.2 Hz to 2 MHz) (frequency dial to output frequency)
External
frequency control (VCF)
Input voltage 0 to + 10 V DC. Frequency decreases with positive voltage
Variable frequency range Greater than 1000:1
Variable symmetry
Variable over 1:1 to 40:1 range
DC offset Continuously variable, maximum of ± 10 V open circuit,
±5 V into 50 ohms.
Polarity Inverted or non-inverted
Sine Wave
Distortion
Less than 1%, 10 Hz to 100 kHz
Amplitude flatness
Within ±1 .0 dB to 1 00 kHz at maximum output amplitude
Output
Variable amplitude
Square Wave
Symmetry
Less than ± 3% at 100 Hz
Rise and fall
time Less than 1 00 ns at maximum output
Output
Variable amplitude
Triangle Wave
Linearity Less than 1%
at 1 00 Hz
Output
Variable amplitude
TTL Output
Rise and fall time Less than 25 ns
Output
TTL level
CMOS Output
Rise and fall time Less than 60 ns
Output
+5 to
+ 15 V, continuously variable
Sweep Characteristics
Internal Linear or logarithm
Sweep rate
0.5 Hz (2 s) to 50 Hz (20 ms), continuously variable
Sweep width Variable from 10:1 to 1000:1
External sweep
Front panel VCF jack, Input impedance is 11 .5 kO.
3

SPECIFICATIONS
Frequency Counter Characteristics
Frequency range 5 Hz
to 10 MHz ( 10 s, 1 s, 0.1 s, 0.01 s)
Accuracy ± 1 count time base accuracy
Stability
Less than ± 20 ppm, 0°C to 40° C
Input sensitivity 30 mV rms, 5Hz to 10 MHz
Maximum input voltage 1 50 V rms at 1 kHz
Input impedance
Approx. 500 kO [0 dB], Approx. 1 MO [20 dB]
Output
Amplitude 20 Vp-p Open circuit, 10 Vp-p into 50 ohms.
Attenuator Steps of - 20 dB, - 20 dB and - 40 dB. Continuously variable
Impedance
50 ohms, ± 1 0%
Power Requirements
Input voltage AC 100 V/120 V/220 V/240 V ±10%
Frequency 50Hz/60Hz
Power consumption Approx. 20 VA
Environmental Conditions
Storage - 20°C to 60°C, Less than 70% humidity
Operating
0°C to 40°C, Less than 80% humidity
Specification 23°C ± 5°C, Less than 70% humidity
Dimensions and Weight
Dimensions
240 (W) X 64 (H) X 190 (D) mm
Weight
1.8 kg
Accessories
Instruction manual x1
ACcord
x1
Fuse 0.3 A (slow-blow type) x 1
0.2 A (fast-blow type) x 1
* Circuit and rating are subject to change without notice due to developments in technology.
4

SAFETY
SAFETY
Before connecting the instrument to a power source, care-
fully read the following information, then verify that the
proper power cord is used and the proper line fuse is installed
for power source. The specified voltage is shown near of
the AC inlet. If the power cord is not applied for specified
voltage, there is
always a certain amount of danger from
electric shock.
Line
voltage
This instrument operates using ac-power inputvoltages that
100/120/220/240 V at frequencies from 50 Hz to 60 Hz.
Power cord
The ground
wire of the 3-wire ac power plug places the
chassis and housing of the instrument at earth ground. Do
not attempt to defeat the ground wire connection or float
the instrument; to do so may pose a great safety hazard.
The appropriate
power cord is supplied by an option that
is specified when the instrument is ordered.
The optional
power cords are shown as follows in Fig. 1.
Plug configuration Power cord and plug
type
~
North American
1
20 volt/60 Hz
Rated 15 amp
(
12 amp max; NEC)
~
Universal Europe
220 volt/50 Hz
Rated 16 amp
~
U.K.
240 volt/50 Hz
Rated 13 amp
~
Australian
240 volt/50 Hz
Rated 10 amp
~
North American
240 volt/60 Hz
Rated 15 amp
(
12 amp max; NEC)
~
Switzerland
240 volt/50 Hz
Rated 10 amp
Line fuse
The fuse holder is located on the rear panel and contains
the line fuse. Verify that the proper fuse is installed by
replacing the line fuse.
Voltage conversion
This
instrument may be operated from either a 1 00 V to
240 V, 50/60 Hz power source. Use the following pro-
cedure
to change from 1 00 to 240 volt operation or vice
versa.
1. Replace fuse FS1 with a fuse of appropriate value, 0.3 A
slow-blow type for 1 00 VAC to 120 VAC operation,
0.2 A fast-blow for 220 VAC to 240 VAC operation.
2. Reinsert
it for appropriate voltage range.
3. When performing the reinsertion of fuse holder for the
voltage conversion, the appropriate power cord should
be used. (See Fig. 1.)
Factory installed Line cord Parts No.
for power
instrument fuse plug fuse cord and plate
0.3 A, 250 V Cord:
Slow blow
None
E30-1820-05
6x30 mm
0.2 A, 250 V Cord:
Fast
blow None
E30-1819-05
6x30 mm
0.2 A, 250 V
Fast
blow
0.8 A
Type C -
6x30 mm
0.2 A, 250 V Cord:
Fast blow
None
E30-1821-05
6x30 mm
0.2 A, 250 V
Fast
blow
None -
6x30 mm
0.2 A, 250 V
Fast
blow
None -
6x30 mm
Fig. 1 Power Input Voltage Configuration
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