Instek GFG-8216A Function Generator

The Instek GFG-8216A is a compact analog function generator delivering precise waveform synthesis across a 0.3 Hz to 3 MHz range. Built for laboratory and field service work, it combines straightforward controls with integrated measurement capability, offering sine, triangle, square, ramp, TTL, and CMOS outputs with selectable sweep modes and modulation flexibility.

## Technical Specifications

**Frequency and Waveform Generation**
• Frequency range: 0.3 Hz to 3 MHz
• Waveforms: Sine, triangle, square, ramp, TTL output, CMOS output
• Sweep modes: Logarithmic and linear
• Duty cycle: Adjustable 80% to 20% up to 1 MHz with signal inversion
• Square wave rise/fall time: 120 ns typical
• Square wave symmetry: 100 ns at maximum output into 50Ω load

**Output Characteristics**
• Amplitude: Greater than 10 Vpp into 50Ω load
• Output impedance: 50Ω ±10%
• Attenuation: Two-step (-20 dB × 2) plus variable attenuator
• DC offset: Variable, -5 V to greater than 5 V into 50Ω load
• Distortion: Low distortion across waveform set

**Modulation and Control**
• AM and FM modulation modes with internal or external control
• Voltage controlled frequency (VCF): External modulation input to 15 V DC

**Integrated Frequency Counter**
• 6-digit LED display
• Internal measurement and external function to 150 MHz
• Sensitivity: 35 mVrms (5 Hz to 100 MHz); <45 mVrms (100 MHz to 150 MHz)
• Counter input impedance: 1 MΩ // 150 pF
• Time base accuracy: ±20 ppm at 23°C ±5°C after 30-minute warm-up
• Resolution: 100 nHz minimum for 1 Hz measurement; 1 Hz minimum at 100 MHz

**Power and Environment**
• Supply: AC 115 V / 230 V ±15%, 50/60 Hz
• Dimensions: 251 mm W × 91 mm H × 291 mm D
• Weight: 2.1 kg
• Operating temperature: 0°C to 40°C
• Storage temperature: -10°C to 70°C
• Relative humidity: 80% maximum

## Key Features

• Fast square wave edges enable precision timing and trigger applications
• Programmable duty cycle supports custom pulse generation up to 1 MHz
• Independent attenuator stages reduce measurement errors across dynamic range
• Built-in counter eliminates need for external frequency measurement equipment
• VCF input allows external control of output frequency for swept testing

## Typical Applications

Component characterization, circuit timing validation, audio equipment testing, signal integrity analysis, prototype validation, educational laboratory work.

## Compatibility & Integration

Standard 50Ω output impedance ensures compatibility with RF test systems, oscilloscope inputs, and amplifier chains. TTL and CMOS outputs support direct logic circuit interfacing.