Thursday, October 7, 2010

APRS Messenger v2.89 with many changes released

Date: Thu, Oct 7, 2010 at 3:26 AM
Subject: [cross_country_wireless] APRS Messenger v2.89 with many changes released

I've just uploaded v2.89 to the website and Files section.

This version has a lot of changes:

Separate transmit and receive sound cards can now be configured.

Sound card sample rates of 48000 Hz and 11025 Hz can now be selected.

Fast and slow CPU options can now be selected.

It has the latest version of the MMVARI sound card engine (first update in 5 years).

The program can with fast CPU selected run 24 simultaneous receivers receiving a selection of modes including PSK-63, PSK-250, QPSK-63, QPSK-125, QPSK-250, GMSK-63, GMSK-125 and GMSK-250. The CPU load is higher and it will only run on PC's faster than 500 MHz due to the amount of number crunching and text string munching that the program is doing.

With slow CPU selected the CPU load is similar to earlier versions with only PSK-63, PSK-250, GMSK-63 and GMSK-250 being received. The slow version will also send on any selected mode but will only receive on the centre frequency with slow AFC.

The check before transmitting routine has also been changed to stop transmitting over other signals.

The delay before an ACK is transmitted has also been extended by 300 microseconds as it was too fast for some transceivers.


Chris, G4HYG

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