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

  • Product Design
  • Training
  • Manufacturing Production Test
  • Field Repair
  • Bench Calibration and Repair
  • Laboratory and Research
  • Education

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

   

CFG253

CFG280

CFG280 Counter Specifications

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 Vp-p

0 to 20 Vp-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 mVRMS from 1 Hz to 50 MHz; 50 mVRMS 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.

Function Generators
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