Function Generators

CFG253 • CFG280

Features & Benefits

CFG253

0.03 Hz to 3 MHz
Square, Triangle and Sine Waves; TTL Output
20 dB Attenuator
Internal or External Frequency Sweep
Variable Duty Cycle
Variable Symmetry (20 to 80%)
One Year Warranty

CFG280

0.1 Hz to 11 MHz (Calibrated)
0.01 Hz to 11 MHz (Uncalibrated)
1 Hz to 100 MHz Counter
Square, Triangle and Sine Waves; TTL Output
20 dB Attenuator
External Gate Input
VCF (FM) Input
AM 0 to 100% Input for External Sine Wave
Internal or External Frequency Sweep
One Year Warranty

Applications

CFG253

Function generators produce sine, square and triangle waves and TTL signals for testing amplifiers, filters and digital circuits. Sweep function can be controlled internally or with an external signal. Duty cycle, DC offset, sweep rate, sweep width and amplitude are all operator controlled. The CFG253 has output bandwidth of 0.03 Hz to 3 MHz.

CFG280 11 MHz Function Generator with Counter

The CFG280 combines an 11 MHz function generator with a 1 Hz to 100 MHz frequency counter. The on-board counter allows the operator to set the frequency output of the function generator precisely. This versatile instrument conserves both bench space and budget.

Characteristics

Key Specifications

CFG280 Counter Specifications
	CFG253	CFG280
Waveform outputs	Square wave, sine wave, triangle wave, TTL pulse, sweep functions for all outputs	Square wave, sine wave, triangle wave, TTL pulse, sweep functions for all outputs
Ranges	1.0 Hz to 3.0 MHz in 7 ranges	0.1 Hz (calibrated) to 11 MHz in 8 ranges
Frequency multiplier	Variable from 0.3 to 3.0 times the selected frequency range	Variable from 0.1 to 1 (uncalibrated) 1 to 11 (calibrated)
Dial accuracy	±5% of full scale	±5% of full scale from 0.1 Hz to 10 MHz
Sine wave distortion	<1% (10 Hz to 100 kHz)	<1% (10 Hz to 100 kHz), -30 dB at all other frequencies
Triangle wave linearity	20 Hz to 200 kHz: ≥99%; 200 kHz to 3 MHz: ≥97%	0.1 Hz to 110 kHz: ≥99%; 110 kHz to 1 MHz: ≥97%; 1 MHz to 11 MHz: ≥95%
Square wave response	≤100 ns rise/fall time, maximum output into 50 Ω load	≤25 ns rise/fall time, maximum output into 50 Ω load
Main output amplitude	0 to 20 V_p-p	0 to 20 V_p-p
Attenuator	20 dB	20 dB
SYNC/TTL output	TTL output level, rise <25 ns (20 TTL load) ≥3 V pk	<25 ns rise/fall time, maximum output into 50 Ω load
Main output impedance	50 Ω ±10%	50 Ω ±10%
DC offset (continuously variable)	±10 V minimum open circuit; ±5 V minimum into 50 Ω load	±10 V minimum open circuit; ±5 V minimum into 50 Ω load
Symmetry/duty cycle	5 to 1 minimum symmetry change	95/5 fixed (pulse and ramp)
Internal variable sweep rate	0.5 Hz to 50 Hz	0.5 Hz to 50 Hz
External voltage-controlled variable sweep range (10 kΩ Input)	100:1 minimum for 0 to +10 VDC input with frequency control set at maximum	100:1 minimum for 0 to ±10 VDC input with frequency control set at 0.1 or 11
VCF (FM) Input		±10 V input shifts frequency ≥100:1 up or down with dial set at 0.1 or 11 respectively
AM		0 to 100%, DBSC, external sine wave only
Warranty	One year	One year
Safety	EN61010-1, UL1244, CSA231	EN61010-1, UL1244, CSA231
EMC	Meets 89/336/EEC	Meets 89/336/EEC
Frequency range (AC coupled)		1 Hz to 100 MHz
Sensitivity		30 mV_RMS from 1 Hz to 50 MHz; 50 mV_RMS from 50 MHz to 100 MHz
Period range/resolution		1 ms to 60 s/1 ms
Crystal frequency		10 MHz
Time base stability		±0.001% (±10 ppm) from 0 ° to 40 °C
Frequency accuracy		±(time base error + 1 count)
Period accuracy		±(time base error + 1 count + trigger error)

Ordering Information

CFG253

3 MHz function generator.

Includes: Operator's manual, US power cord, one year warranty.

CFG280

11 MHz function generator with 100 MHz counter.

Includes: Operator's manual, US power cord, one year warranty.