High-performance modem, with a variety of waveforms to meet your needs

HF/VHF/UHF modem waveforms

A world class modem, our HSM-2051 supports most major HF standards, with rates up to 9.6 kbps skywave / 16 kbps surface wave in 3kHz (SSB) and 19.2 kbps skywave/32 kbps surface wave in 6 kHz (ISB). In V/UHF, user data rates in a single 40 kHz channel go up to 153.6 kbps (coded) leveraging our proprietary autobaud capable waveforms.

WBHF support

In a WBHF mode, the HSM-2051 supports the MIL-STD-188-110D Appendix D waveform, providing data rates ranging from 75 bps – 16 kbps at 3 kHz through to 1.2 kbps – 240 kbps at 48 kHz.

Get in touch and we’ll help ensure you have access to flexible, high-performance connectivity when you need it, across a variety of applications.

Features & benefits

  • MIL-STD-188-110D Appendix D for wideband HF support
  • STANAG 4691 Annex B Compliant
  • Remote control GUI via Ethernet
  • Modem probe mode
  • Load/save multiple user configurations
  • Synchronous, asynchronous, and Ethernet interfaces
  • Remote controllable across any standard IP network
  • Comprehensive signal display (including BER and impulse response)
  • Internal/external loopback provides install test at unit or system level
  • Includes control and data software development kit (SDK) to enable application developers to interface their products to the modem using socket connections

Troubleshoot using modem probe mode

The HSM-2051 includes a modem probe mode in which the signal path is characterized to determine the signal to noise radio (SNR), available bandwidth, radio automatic level control (ALC) and automatic gain control (AGC). What’s more, it can detect distortion from non-linear effects, aiding in installation and troubleshooting.

Channel simulator

Another feature of the HSM-2051 is a two-channel, real-time, ionospheric channel simulator that simulates the effect of an HF/WBHF channel. Enhancing the Watterson HF channel model, our channel simulator provides traditional Additive White Gaussian Noise (AWGN) and CCIR Recommendation 322 noise.