by Othernet

A field-configurable wideband frequency converter and signal generator

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A wideband completely field-configurable frequency converter and signal generator with an LCD display and button interface designed for low spurious emissions and enclosed in a precision-milled all-aluminum enclosure.


Recent Updates

As Featured In

Microwave Journal

"moRFeus was built for hams and hackers, people with a traditional amateur radio background, as well as a makers and researchers that are interested in RF experimentation."


"A tool like this is very handy to have in your RF kit."

Geeky Gadgets

"moRFeus Configurable Wideband Frequency Converter Hits Crowd Supply"


"Con pantalla retroiluminada incluida, este conversor de frecuencia de banda ancha y generador de señal es una herramienta pequeña y ligera, apta para transportarla."

MoRFeus is a 30 MHz – 6 GHz field-configurable Fractional-N wideband frequency converter and signal generator. Its LCD display and button interface enable dynamic field-level configuration - from switching between signal generator and other modes, to setting the local oscillator frequency and more. It was designed for wideband frequency up- and down-conversion - with an LO frequency range of 85 MHz–5.4 GHz and input/output frequency range of 30 MHz – 6 GHz

MoRFeus is small, lightweight, and functional. It was designed for low spurious emissions and is packaged in a precision-milled aluminum enclosure.

7.4 ounces and 3.5 x 2.7 x 1.5 inches

Use cases for moRFeus are many

  • Wideband radios
  • Distributed antenna systems
  • Diversity receivers
  • Software-defined radios
  • Frequency band shifters
  • Point-to-point radios
  • WiMax/LTE infrastructure
  • Satellite communications
  • Wideband jammers
  • Remote radio heads
  • Frequency up/down conversion
  • Automated test equipment (ATE)
  • Wireless communication systems

How it works

MoRFeus integrates into popular RF environments using SMA connectors and is powered using an external micro-USB 5 V supply. The LCD display and button interface provide a dynamic way to program the mixer LO frequency in the field with a step size of 1.5–3 Hz*. Dynamic toggling between mixer and generator modes adds to field-level functionality. An optional bias voltage of 5 V is available via RF choke to the mixer input to supply active antenna systems. The device is also USB HID programmable, enabling automatic operation from a PC running Windows or Linux.


  • RF input frequency: 30 MHz – 6 GHz
  • RF output frequency: 30 MHz – 6 GHz
  • LO frequency: 85 MHz – 5400 MHz
  • Fractional-N synthesizer
  • LO step size: 1.5 – 3 Hz*
  • USB programmable (Windows or Linux)
  • Generator/mixer function toggle
  • Small, portable form factor
  • Adjustable mixer bias current
  • LCD display With backlight
  • Button control interface

General Specifications

  • Input voltage: 5 V
  • ESD protection (RF IN and OUT ports): IEC 61000-4-2 contact discharge, 8 KV
  • Bias voltage: 5 V
  • Active bias current protection: 425 mA
  • Mixer input/output isolation: see mixer performance
  • Input IP3: +23 dBm
  • RF/IF input absolute maximum power: +15 dBm
  • Operating temperature -40 to +85
  • Storage temperature range -65 to +150
  • Dimensions: 88 mm x 38 mm x 68 mm
  • Weight: 7.4 oz

*Step size is frequency-dependent. Lower step sizes (1-2 Hz) are characteristic of lower frequency domains and higher step sizes (2-3 Hz) of higher domains.


LOPhase Noise (dBc/Hz)Offset
1 GHz-10810 kHz
1 GHz-107100 kHz
1 GHz-1351 MHz
2 GHz-10210 kHz
2 GHz-101100 kHz
2 GHz-1301 MHz
3 GHz-9810 kHz
3 GHz-98100 kHz
3 GHz-1251 MHz
4 GHz-9610 kHz
4 GHz-95100 kHz
4 GHz-1241 MHz
Mixer Performance
LOInput PowerInput FrequencyOutput FrequencyOutput PowerConversion Gain

Mixer Current

moRFeus offers an optional mixer current control which impacts the linearity of the output signal. The controls are exposed for advanced users to experiment and fine tune mixer performance.

Generator Mode

In generator mode, the output port of moRFeus is set to the LO frequency. It has a range limited by the internal LO which is 85 Mhz to 5.4 GHz (it should be noted that the mixer input handles frequencies up to 6G Hz). Generator mode can be used to generate arbitrary CW signals for testing or mixing purposes.

A plot of Output Power versus Mixer Current Setting

In generator mode, output power changes relative to the mixer current setting. When the mixer current is set to 0, output power is relatively low. For settings 1-7, output power is stronger. This chart plots output power relative to the mixer current setting.

Output Power vs Mixer Current setting (generator mode)

Device Information

Click to view and download the moRFeus Data Sheet

Click to view and download the moRFeus User Guide


Othernet moRFeusSignal Hound VSG25A Vector Signal GeneratorRF Explorer Signal Generator (RFE8GEN)Mini-circuits ZX05-63H-S+ (Mixer)Windfreak MixNV (Mixer + Signal Generator)
RF Input Frequency Range30 MHz-6 GHzN/AN/A750 MHz-6 GHz1 MHz-6 GHz
RF Output Frequecy Range30 MHz-6 GHz100 MHz-2.5 GHz 24 MHz-6 GHz DC-1 GHz1 MHz-6 GHz
LO Frequency Range85 MHz-5.4 GHz N/AN/A750 MHz-6 GHz85 MHz-5 GHz
Frequency Resolution1.5–3 Hz¹< 1 Hz1 KHzN/A1 Hz
Phase noise at 1 GHz and 10 kHZ offset-108 dBc/Hz-88 dBc/Hz N/AN/A-108 dBc/Hz
Frequency up/down ConverterYes No No Yes Yes
Signal GeneratorYes Yes Yes No Yes
Field-configurableYes No Somewhat No No
User InterfaceButton/LCD display and software-programmable Windows PC VSG25A software requiredLCD Display and RF Explorer for Windows PC clientN/ASoftware-programmable, Windfreak software w/ Labview GUI
Bias Current AvailableYes NoNoNoNo
RF In/Out ConnectorsYes, SMAOut, SMAOut, SMAYes, SMAYes, SMA
Power Input Connectormicro-USB USB Type Bmini-USBN/Amini-USB
Stand-alone Signal GeneratorYes ² No ³Yes NoNo ³
Stand-alone Frequency ConverterYes No ⁴ No ⁵ No ⁶ No ³
Price$149 $495$189$53 $499
Notes: 1. step size is frequency-dependent, see datasheet 2. uncalibrated amplitude, see datasheet 3. requires PC 4. requires PC + mixer 5. requires mixer 6. requires LO and signal generator

To solve our RF testing needs, and yours

Over the past three years, Othernet has designed, developed, and deployed thousands of data radios all over the world to receive multi-media content - from news and emergency alerts to real-time weather data, educational material, audio files, and videos - via our satellite broadcast. No small feat, this required innovations in RF. moRFeus came about because of a need we had to easily up- and down-convert various radios we were experimenting with for Othernet’s Dreamcatcher 3.0.

One of our team members came up with the idea about a year ago. By the summer of 2017, we had our first prototype and working firmware. The design still required some slight tweaking. The current version of moRFeus is the third design iteration. Oddly enough, the last phase of the project, industrial design of the enclosure, ended up being the most time-consuming. We worked with a local designer with decades of experiences as a machinist to come up with a custom-made, all-aluminum enclosure. We are excited to offer the technology to help you with your unique RF project.

moRFeus Video Demonstration



Othernet is innovating in RF. Over the past few years, Othernet has designed, developed, and deployed thousands of data radios all over the world and to receive multi-media content - from news and emergency alerts to real-time weather data, educational material, audio files, and videos - via our satellite broadcast. No small feat, this required innovations in RF.

Syed Karim

Kara Scanlin

Zoltan Doczi


See Also

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