Skip to main content

Getting started with PSK31

I saw a great presentation on PSK31 using the nue psk portable modem at the Mesilla Valley Radio Club this past weekend. The Nue PSK modem let's you get on the air with PSK31 without a computer. It uses an on-board micro-controller to handle the modem operations and includes an LCD for the waterfall display.

It occurred to me that my Windows Mobile enabled phone also has a programmable processor and a decent LCD display, so I went searching for PSK31 software for the Windows Mobile platform. NT7S quickly pointed me to Pocket Digi. It's a great little program that was easy to install and use! So far I've been able to decode psk31 just by placing my phone close to the speaker of an HF rig and selecting QSOs on the waterfall display.

On my Treo phone, I did have to do one quick little workaround. I first open the Windows Media Player and play any song. For some reason, this alerts the platform or the software that the speaker and microphone exist. If I don't do this, PocketDigi wakes up and complains that it can't access the microphone on the Treo.

Nobody heard me last night on transmit. On the chance that the issue is caused by my headphone speaker being used as the input to the PTT microphone, I went searching for audio-out to mic-in circuits and found this great page by G4NSJ with lots of interface circuits and info.

I'll add updates on my progress in future posts!

Have fun!
73 de KD0FNR
Labels:

Comments

  1. AnonymousJanuary 8, 2009 at 6:24 PM

    Glad to have assisted you with the PSK app. Hope you can get that thing transmitting and I can catch you on the air sometime.

    73 de NT7S

    ReplyDelete

Post a Comment

Please leave your comments on this topic:

Popular posts from this blog

The Valentine's Day Magnetic Monopole

There's an assymetry to the form of the two Maxwell's equations shown in picture 1.  While the divergence of the electric field is proportional to the electric charge density at a given point, the divergence of the magnetic field is equal to zero.  This is typically explained in the following way.  While we know that electrons, the fundamental electric charge carriers exist, evidence seems to indicate that magnetic monopoles, the particles that would carry magnetic 'charge', either don't exist, or, the energies required to create them are so high that they are exceedingly rare.  That doesn't stop us from looking for them though! Keeping with the theme of Fairbank[1] and his academic progeny over the semester break, today's post is about the discovery of a magnetic monopole candidate event by one of the Fairbank's graduate students, Blas Cabrera[2].  Cabrera was utilizing a loop type of magnetic monopole detector.  Its operation is in...
1 comment
Read more

Cool Math Tricks: Deriving the Divergence, (Del or Nabla) into New (Cylindrical) Coordinate Systems

Now available as a Kindle ebook for 99 cents ! Get a spiffy ebook, and fund more physics The following is a pretty lengthy procedure, but converting the divergence, (nabla, del) operator between coordinate systems comes up pretty often. While there are tables for converting between common coordinate systems , there seem to be fewer explanations of the procedure for deriving the conversion, so here goes! What do we actually want? To convert the Cartesian nabla to the nabla for another coordinate system, say… cylindrical coordinates. What we’ll need: 1. The Cartesian Nabla: 2. A set of equations relating the Cartesian coordinates to cylindrical coordinates: 3. A set of equations relating the Cartesian basis vectors to the basis vectors of the new coordinate system: How to do it: Use the chain rule for differentiation to convert the derivatives with respect to the Cartesian variables to derivatives with respect to the cylindrical variables. The chain ...
11 comments
Read more

More Cowbell! Record Production using Google Forms and Charts

First, the what : This article shows how to embed a new Google Form into any web page. To demonstrate ths, a chart and form that allow blog readers to control the recording levels of each instrument in Blue Oyster Cult's "(Don't Fear) The Reaper" is used. HTML code from the Google version of the form included on this page is shown and the parts that need to be modified are highlighted. Next, the why : Google recently released an e-mail form feature that allows users of Google Documents to create an e-mail a form that automatically places each user's input into an associated spreadsheet. As it turns out, with a little bit of work, the forms that are created by Google Docs can be embedded into any web page. Now, The Goods: Click on the instrument you want turned up, click the submit button and then refresh the page. Through the magic of Google Forms as soon as you click on submit and refresh this web page, the data chart will update immediately. Turn up the:...
Post a Comment
Read more