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[Linrad] Re: MAP65 for SDR-IQ
- Subject: [Linrad] Re: MAP65 for SDR-IQ
- From: Joe Taylor <Princeton.EDU; joe@xxxxxxxxxxxxxxxx>
- Date: Sat, 28 Feb 2009 17:40:23 -0500
Today I spent a few hours at the K2UYH station, along with K2TXB, giving
the new program MAP65-IQ a thorough workout on 1296 MHz.
Our tests were a great success. We digitally recorded a 90 kHz slice of
the 1296 band -- roughly 1296.005 to 1296.095 -- for a couple of hours.
The recordings contain many signals, both CW and JT65, and they will
be very useful to me in optimizing the MAP65-IQ code. During the tests
we worked PA3FXB, RD6DA, and W7UPF in JT65C mode -- thanks Jan, Yuri,
and Don for the QSOs! We also copied K8EB... and many repetitions of
PA3FXB and RD6DA calling CQ.
As I reported here a couple of weeks ago, MAP65-IQ is a
single-polarization version of MAP65. It works together with the SDR-IQ
receiver from RFSpace, and the Linrad software. The combination makes a
superb receiver for digital EME, with wideband panoramic display, and
optimized for single-polarization stations. All three sub-modes (JT65A,
B, and C) are supported.
MAP65-IQ is now ready for testing by others. Fair warning: it still has
a few rough spots. (They are related to code inherited from MAP65,
which is explicitly designed for single-mode, single-band,
dual-polarization systems at 144 MHz.) I hope to find time to do some
necessary polishing of the user interface in the next few weeks.
To use MAP65-IQ you'll need a receiving setup with an SDR-IQ under
control of Linrad. You can run Linrad and MAP65-IQ on separate
computers, or on the same computer. Linrad runs under Linux or Windows;
MAP65-IQ can be compiled for Linux, but the version now being made
available for download is Windows only. In today's tests we used a
single Windows computer for both programs, and this worked very well.
Some basic instructions -- enough to get you started, I hope -- have
been posted on the WSJT web site at
You can download the MAP65-IQ installation file from
Please feel free to ask questions or provide feedback here (especially
if it will be of interest to other users) or to me directly.
-- 73, Joe, K1JT
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