ARQ-S / ARQ1000S

Synchronous Simplex ARQ using the 7 bit error correcting ITA 3 alphabet with the addition of 1 bit for parity-check. Two stations use the same frequency, working as ISS (transmitting) and IRS (receiving) stations. This module does not auto-detect the character cycle rate, you must choose the correct one yourself.

Every odd numbered cycle has all bits inverted. Repetition cycle timings for block lengths of 3, 4, 5, 6 or 7 characters are as follows,