Date: Sat, 30 Mar 2013 19:07:07 +0100
From: "oz7is(at)edr.dk" <gyllich(at)gmail.com>
To: iaru_c5(at)ml.oevsv.at
Subject: [Iaru_c5] OZ7IGY - another new "next generation" beacon and
PI4 sequence on 70 cm to 6 m
Message-ID:

QSP from EDR:

Today, Saturday 30 March, is the 56th anniversary of OZ7IGY and also the
launch date for the new 70 cm beacon based upon the Next Generation
Beacon
platform: http://www.rudius.net/oz2m/ngnb

The 70 cm beacon is now frequency and time locked to GPS. The sequence
is timed to start at 00 second sending PI4 followed by a short pause
then CW ID sending callsign and locator, then pause and carrier until
next cycle. The nominal frequency remains the same, i.e. 432,471 MHz. To
decode PI4 tune your receiver to 800 Hz below the nominal frequency,
just like you do when you want to decode a normal CW signal at 800 Hz.
On most radios this is a USB dial of 432.470.2.

At the same time the 6 m, 4 m and 2 m beacons have also changed MGM to
PI4. The CW callsign, locator and carrier remain the same.

PI4 is a digital modulation (MGM) specifically designed with beacons and
propagation studies in mind.

Download PI-RX to decode PI4: http://www.rudius.net/oz2m/ngnb/pi-rx

PI4 encoding examples in Arduino C, Atmel C, Delphi Pascal, Microsoft
Visual Basic and Microsoft
C++:http://www.rudius.net/oz2m/ngnb/software.htm

PI4 online encoding and frequency calculation:
http://www.rudius.net/oz2m/ngnb/pi4encoding.php

PI4 specification: http://www.rudius.net/oz2m/ngnb/pi4.htm PI4 is a
cousin of JT4, JT9 and WSPR.

OZ7IGY status page: http://www.rudius.net/oz7igy

73
Bo, OZ2M
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End of Iaru_c5 Digest, Vol 73, Issue 1
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