R&S^®GS2200 Data Link Processor

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 automaticradio 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)