R&S®GS2200 Data Link Processor

Automatic link establishment (ALE)

  • Overview

Key Facts

  • Automatic continuous passive channel analysis of all user-programmed pool frequencies during scanning mode
  • Automatic channel selection by means of computation of the optimum working frequency from a pool of frequencies

Key Facts

Two different procedures are available for the ALE (automatic link establishment) radio processor:

  • ALIS (Rohde & Schwarz proprietary standard)
  • ALE (in line with MIL-STD-188-141 B)

One of these ALE standards can be loaded into the Processor R&S®GS2200.

Using the Rohde & Schwarz automatic radio link setup and continuous link quality monitoring procedure of ALIS (automatic link setup) along with the R&S®XK2000 transceiver family makes it possible to achieve unequaled operating features.

  • Simple operation by entering a 4-digit address
  • Realtime channel analysis
  • Best-channel calculation and setting
  • Automatic link setup
  • Ongoing channel monitoring
  • Adaptive response in case of interference
  • 100% error-free transmission

With the ALIS software selected, the Data Link Processor R&S®GS2200 can perform the following functions:

  • Automatic continuous passive channel analysis of all user-programmed pool frequencies during scanning mode
  • Automatic channel selection by means of computation of the optimum working frequency from a pool of frequencies
  • Automatic reliable and fast link setup through narrowband FSK (BW = 300 Hz, shift = ±85 Hz) at the optimum frequency from the pool
  • Selective calling addresses (up to 9999)
  • Automatic transmission of status
    • Type of modulation
    • Speed of data transmission
    • Type of data protection (FEC, ARQ, PRP)
  • Automatic error correction (ARQ or PRP) and adaptive response during message transmission, either at a data rate of 228 bit/s (normal FSK modulation, basic feature) or 5400 bit/s (with additional HF data modem)
  • Data transmission format
    • 5 bit Baudot (telex)
    • 7 bit ASCII (text files from PCs)
    • 8 bit ASCII (text and binary files, etc)
  • Message length: unlimited
  • SSB voice operating capability after automatic link setup procedure (no adaptive response during voice operation)

Depending on the requirements:

  • Preferred or existing method
  • Link setup with or without adaptive response
  • Response to interference on the radio link (ARQ)
  • Considerations of frequency economy, spectrum pollution and probability of intercept
  • Operator convenience, error correction and expandability
  • Interoperability with other systems and systems from other manufacturers

Rohde & Schwarz offers ALE methods that meet the following standards:

  • Rohde & Schwarz standard ALIS
  • MIL-STD-188-141B, App. A (FED-STD-1045/1046)
  • MIL-STD-188-141B, App. A + B (FED-STD-1045/1046/1049)
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