Rohde & Schwarz HMF2550 function/arbitrary waveform generator

The Rohde & Schwarz HMF2550 is a single-channel arbitrary function generator delivering precision waveform synthesis from 10 μHz to 50 MHz. Built on Digital Signal Synthesis (DDS) principles, it generates standard waveforms - sine, square, triangle/ramp, and pulse - plus user-defined arbitrary signals at 250 MSa/s with 14-bit resolution and 256 kPts memory depth. Output ranges from 5 mVpp to 10 Vpp into 50 Ω loads, with steplessly adaptable impedance from 1 Ω to 10 kΩ and programmable DC offset to ±5 V.

Harmonic distortion stays below −70 dBc up to 100 kHz, with phase noise of −115 dBc/Hz (typ.) at 10 kHz offset. The pulse generator produces outputs from 100 μHz to 25 MHz with pulse widths as narrow as 15 ns and fixed 8 ns rise/fall times. Advanced capabilities include AM, FM, PM, PWM, and FSK modulation; linear and logarithmic sweep; burst and gating functions; and both internal and external triggering.

A 3.5" QVGA TFT display provides real-time waveform visualization and parameter control.

Technical Specifications

• Frequency Range: 10 μHz to 50 MHz


• Output Voltage (50 Ω load): 5 mVpp to 10 Vpp


• Output Voltage (open circuit): 10 mVpp to 20 Vpp


• Output Impedance: 1 Ω to 10 kΩ (steplessly adaptable)


• DC Offset: ±5 mV to ±5 V


• Amplitude Resolution: 1 mV into 50 Ω


• THD: 0.04% (f < 100 kHz)


• Phase Noise: −115 dBc/Hz (typ., SSB, 10 kHz offset, 1 Vpp)


• Arbitrary Waveform: 250 MSa/s, 14-bit, 256 kPts memory


• Pulse Frequency: 100 μHz to 25 MHz


• Pulse Width: 15 ns to 999 s (5 ns resolution)


• Rise/Fall Time: 8 ns (fixed)


• Jitter: < 1 nsrms (typ.)


• Ramp Linearity: < 0.1% typ. up to 250 kHz; < 2% typ. above 250 kHz


• Display: 8.9 cm (3.5") QVGA TFT


• Power Supply: 105–253 V, 50/60 Hz ±10%

Key Features

• Pre-defined arbitrary waveforms including sin(x)/x, white noise, pink noise, cardiac, and exponential rise/fall


• Ramp symmetry adjustment: 0% to 100% (0.1% resolution)


• AM, FM, PM, PWM, FSK modulation with internal and external sources


• Linear and logarithmic sweep modes


• Burst and gating functionality


• 10 MHz reference clock with ±1 ppm TCXO


• USB/RS-232 dual interface standard

Typical Applications

• Research and development laboratories


• Industrial test and measurement environments


• Production facility validation


• Educational and training institutions

Compatibility & Integration Standard connectivity via USB/RS-232 dual interface. Optional Ethernet/USB dual interface available.