Stanag-4539, Stanag-5065-fsk, Swed-arq – Wavecom W-SPECTRA (Automatic Monitoring System) V1.1.0 User Manual

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Transmission Modes

WAVECOM Monitoring System W-SPECTRA, W-SPEED Manual V1.1.0

Tuning the decoder

The decoder can process signals in both SSB settings: USB and LSB. The sideband is selected by toggling
the polarity field of the display: NOR means USB and INV means LSB.

The center frequency of the decoder is set to the default value of 1700 Hz, but can be adjusted within a
range from 800Hz to 2400Hz. Small frequency deviations are automatically tracked and compensated dur-
ing the decoding. By using the bar graph, any remaining frequency difference can be compensated by fi-
ne-tuning of the receiver frequency or by adjusting the center frequency of the decoder.

Using the Frame Format field, the decoder can be set to one of the above listed user data configurations.
A correct coded frame format is determined by a confidence value being stable and greater than 95 (i.e.,
95% correct), while for uncoded formats the value has no meaning and remains stable at 75.

STANAG-4539

See “

MIL-188-110B (Appendix C), STANAG 4539

” on page 123.

STANAG-5065-FSK

STANAG-5065 is a asynchronous FSK system and was developed to provide NATO countries with interop-
erable shore-to-ship broadcast communications using the low frequency (LF) band (specifically 60 kHz-
160 kHz).

Parameter

Value

Frequency range

VLF

Operation modes

Broadcast

Modulation

MSK

Symbol rate

50, 75, 100 or 150 Bd

Center frequency

975 Hz

Shift

85, 850 Hz

Receiver settings

DATA, CW, LSB or USB

Input format(s)

AF, IF

Additional Info

Async FSK only

For STANAG-5065 FSK mode standard baud rates from 50 to 150 Bd are available. Non-standard baud
rates may be selected using the Baudrate menu item.

From Options | Display… ASCII and BAUDOT ar available as an output formats.

SWED-ARQ

SWED-ARQ is an adaptive telegraphy system which operates at a rate of 100 Bd.