MultiPSK 4.12 released

Patrick F6CTE has released a new version of the popular Amateur Radio digital software MultiPSK

He writes:
The new release of MultiPSK 4.12 is on my Web site http://f6cte.free.fr

The main mirror site is Earl's, N8KBR:
http://www.eqth.info/multipsk/index.html (click on "United States Download Site").

Another mirror site is Terry's: http://g90swl.co.uk/multipsk/

Multipsk and Clock are freeware programs but with functions submitted to a licence (by user key).

The main modifications of MULTIPSK 4.12 are the following:

1) New Call ID identifier

This "Call ID" ("Call" for "Call sign") identifier can be, automatically, detected and located. It can be any Call sign or Call sign 6 characters + Locator. The Call ID is always detected at -13 dB (first decodings at -18 dB), so with a sensitivity better than the PSK31 one. The central frequency of the identifier (which is also the central frequency of the transmission), is determined with a precision of +/- 2.7 Hz.

As soon as this identifier (without any error) is received, Multipsk:

* display, on the waterfall, the call sign, possibly preceded by "CQ " and possibly followed by "Emergency!" (and a short ring) and the Locator,

* display the call sign (possibly preceded by "CQ ") and the Locator on the waterfall,

* display the time of reception, the call sign, the Locator and the Signal to Noise ratio in the Call ID reception window,

* switch on the received frequency (optional),

* display the position the Locator on a map (optional).

This identifier is transmitted in 3.3 sec and has a bandwidth of 172 Hz. It is composed of a RS ID (code 153) followed by a sequence of 56 bits of data and 24 bits of CRC.

It is a free error transmission, i.e in presence of an Call ID, there are two solutions:

* either the Call ID is not received because the signal is too weak,

* or it is received and it is correct, the probability of detection of a wrong identifier due to radio noise being almost nil.

Refer to the "The_Call_ID_ easy_with_ Multipsk. doc" paper available on my WEB site, to use this function easily
http://f6cte.free.fr/The_Call_ID_easy_with_Multipsk.doc

Note: for the programmers of coding/decoding softwares, I propose, on demand, the source in Pascal (Delphi) for the creation and management of the sequence of 56 bits of data and the 24 bits of CRC.

2) Possibility to immediately display APRS received position on Google Earth.

3) The Multipsk client program (demonstration of the Multipsk control through a TCP/IP link - sources and .EXE) is now in version 5: new commands + Call ID / RS ID server comments + some new commands are now non-licencied.

Note about translation of Multipsk.exe and Clock .exe: the 4.11.1 version of Multipsk/Clock has been completly translated to Spanish by Joachin (EA4ZB), from French.
The translation file is on my Web site (http://f6cte.free.fr).

73

Patrick F6CTE

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