RM6-A Data Modem & ALE Controller | RM6-A HF Radio Modem

RM6-A Data Modem & ALE – 3, 6 kHz

The RM6-A is a high data rate LF and HF data modem and ALE controller for standards-based BLOS naval and strategic data communications. The RM6-A supports MIL-STD-188-110A/B, STANAG 4539 and related modems and MIL-STD-188-141, App A (2G ALE) and App B (Linking Protection). The RM6-A is a replacement of the RM6 modem and it is recommended for new systems.

View RM6 vs RM6-A Product Comparison (pdf)

The RM6-A shares its interface layout with the newer RM8 and RM8 wideband modems. The RM6-A supports the RAP1/RIPC and STANAG 5066 Annex E (ASCII) control protocols.

The RM6-A is suitable for long-distance (up to 10 000 km) point-to-point data communications. The unit offers a built-in 2G ALE controller option. The RM6-A is recommended as an alternative to the RM6 for new installations.

The RM6-A is based on the latest generation hardware and software. The RM6-A matches the form and fit of the RM8.

The maximum data rate is 9600 bps over a standard 3 kHz (SSB) HF radio channel and 19200 bps over an ISB channel.

The RM6 is designed to operate in conjunction with an external STANAG 5066 ARQ server. The unit is intended for installation into 19-inch rack systems or to be used as a desktop unit. The front panel (LCD display and keypad) provides full local control of all settings and functions.

The function of the RM6-A is determined by the selection of one of the following software packs:

  • M1: LF and HF Modem (SSB, ISB, up to 19200 bps)
  • M2: HF Modem (SSB, up to 9600 bps)

The following software option is available for software packs M1 and M2:

  • 2G ALE Controller Software Option

Features and Benefits

RM6-A Modem Platform

  • Up to 9600 bps in 3kHz
  • Up to 19200 bps (ISB radio)
  • STANAG 5066 Interoperable
  • Broadcast and Ship-Shore (BRASS) Compatible
  • MIL-STD-188-114 Compatible Interface
  • Supports Split-Site Operation
  • AC Supply: 100 – 240 VAC, 50/60/400 Hz
  • -30°C to +70°C operating
  • Size: ½ of 1U 19-inch rack
  • Two Units Will Fit Side-by-Side in a 1 U Slot

LF and HF Software Packs (M1, M2)

Software Pack
M1 M2
MIL-STD-188-110B Appendix C (QAM)
MIL-STD-188-110B (QAM)
MIL-STD-188-110B Appendix F (QAM)
MIL-STD-188-110A 5.3 (8-PSK)
STANAG 4415 (WALSH)(NATO Robust)
STANAG 4285 (8-PSK)
STANAG 4529 (NB 8-PSK)
FSK Variable

2G ALE Controller Software Option

  • MIL-STD-188-141B App. A
  • FED-STD 1045
  • Occupancy Detection
  • MIL-STD-188-141B App. B
  • FED-STD 1049 Linking Protection
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