R&S®M3TR Software Defined Radios

Multiband, multimode, multirole radio family for tactical communications

Features & Benefits

Data communications

STANAG 4285 data mode (R&S®GM4120S)

The STANAG 4285 HF modem is a transparent modem for narrowband (3 kHz) data communications in the HF band with a user data rate of up to 3600 bit/s. The following user data rates can be selected via radio HMI:

  • 75 bit/s
  • 150 bit/s
  • 300 bit/s
  • 600 bit/s
  • 1200 bit/s
  • 2400 bit/s
  • 3600 bit/s

STANAG 4539 data mode (R&S®GM4120S)

The STANAG 4539 HF modem enables self-identifying (auto-baud) data communications (up to 12800 bit/s) in a 3 kHz channel in the HF frequency range.

STANAG 4539 is based on more than one standardized modem waveform.

  • STANAG 4415 (very robust traffic waveform at 75 bit/s)
  • MIL-STD-188-110B (low and medium rate serial tone waveforms from 150 bit/s to 2400 bit/s)
  • MIL-STD-188-110B App. C (high data rate waveforms from 3200 bit/s to 12800 bit/s)

R&S®SECOM-H data mode

The R&S®SECOM-H high-frequency (HF) electronic protection measures (EPM) system is a frequency-hopping HF radiocommunications system.

R&S®SECOM-H is designed to operate in environments where a certain percentage of hop set frequencies are blocked due to either intentional jamming or environmental interferences, e.g. atmospheric noise, thunderstorms, or other electrical disturbances.

R&S®SECOM-H provides the following user data rates:

  • 300 bit/s
  • 600 bit/s
  • 1200 bit/s
  • 2400 bit/s

The data rates are selectable by HMI.

R&S®SECOM-V data mode

In R&S®SECOM-V, data rates up to 16 kbit/s are possible. User data rates span from 600 bit/s up to 9.6 kbit/s depending on FEC share and number of retransmissions. R&S®SECOM-V uses binary continuous phase FSK modulation with a shift of 6.25 kHz. R&S®SECOM-V hopping works in the frequency range from 30 MHz to 107.975 MHz and 121 MHz to 511.975 MHz.

72 kbit/s VHF/UHF modem

For mobile radiocommunications, military users often employ terminal equipment of narrow bandwidth and with limited channel capacity. Such equipment has limited data transmission capability. The new software-based highspeed modem for the R&S®M3TR allows the transmission of radio data at high rates:

  • Up to 72 kbit/s
  • Bandwidth efficiency up to 3 bit/s/Hz
  • Auto-baud capability
  • Embedded solution for R&S®MR300xH/U transceiver
  • For complete VHF/UHF range from 30 MHz to 512 MHz

User data rates

The modem supports ten different waveforms with allocated bandwidths which can be selected by the user.

The data rates as well as the subsciber data rates are selectable by HMI or can be preconfigured by a configuration tool (R&S®RNMS3000).