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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=wb3awj@comcast.net href="mailto:wb3awj@comcast.net">Robert A.
Poff</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=app_rpt-users@ohnosec.org
href="mailto:app_rpt-users@ohnosec.org">app_rpt-users@ohnosec.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Friday, August 29, 2014 5:56
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [App_rpt-users] audio
level</DIV>
<DIV><BR></DIV>I wouldn't use the mic input on the M2 backplane.<BR><BR>Using
a URI, I run it through the op amp in the URI, and then directly to the
exciter audio input.<BR><BR>On the direct FM exciter (the so called PLL
exciter) I've measured the CG input is dead flat from 50 cycles or so to at
least 8KC. No pre-emphasis at all. This is where they injected the EDACS voice
data. A perfect place to inject TX audio. <STRONG>Just remember to set
the URI to TXPRELIM=YES. I don't think SIMPLEUSB will do that will
it? Don't you have to use USBRADIO to do that?</STRONG><BR><BR>As to
levels......<BR>It's generally been my habit, from my two way radio service
days, to set the exciter to hard limit everything at 5 KC. Then set the
transfer audio so that a signal on the input modulated, to 3 KC modulates the
transmitter to 4 KC. Takes advantage of the limiter to make up a bit of mod
density. With Allstar do this with the txvoice set command.<BR><BR><BR>--
<BR>Sent from my Android phone with K-9 Mail. <BR>Please excuse my brevity and
typing errors.
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