IRLP-Handheld Interface

[Tony.RI]

I'm thinking of buying IRLP hardware, and I've been looking into radios for simplex node use. Since using a mobile radio would obviously be the easy answer, , I started hunting for a way to use a handheld, since I've already got my hands on an HT1000 and a couple Sabers. (I understand the issue with regards to duty cycle meltdown. I just want to know if it can be done.) So I then started to read up on relevant information. (IRLPv3 Wiring Instructions (PDF), Jedi Connector, Saber Connector, What is COS?, ...)

After a little digging, I verified that pin 6 ("Speaker Common") on the HT1000 gives 3.6v-3.9v when squelch is open, and falls below 1v when muted. So, if I understand COS correctly, then that little issue is solved for the HT1K. (If not, please let me know before I blow something up!)

I also have a few questions. First of all, is there a way to get COS on a Saber? Playing with a voltmeter hasn't yielded many positive results. Secondly, do Jedi's require a change in voltage on Option Select to use external audio and PTT, as documented for the Saber? If so, how exactly should I go about doing it? Finally, what connectors should I buy for both the Saber and HT1000, for this and other homebrew projects?

Thank you!

[Will]

What is COS?

COS is short for Carrier Operated Switch which dates back to the tube radio days. It was a relay (switch) that was activated when the receiver had a carrier.

Today the term RUS is used and means Receiver Un-Squelched. Usually a logic level indicating the receiver is receiving a valid signal with the proper PL code detected.

[/\/\y 2 cents]

Critical RF builds this. It is a private IRLP system with soft radio clients for Windows, Macintosh, Windows Mobile, and iPhone.

www.criticalrf.com

SiteCAST is the inexpensive box and comes with all the software included.

Steve

[escomm]

In the interest of open disclosure, /\/\y 2 cents works for Critical RF. Usually it's a good idea to disclose when someone's pushing their own product.

[/\/\y 2 cents]

I started Critical RF.

You are correct sir.

/\/\y 2 cents