<html>
<head>
<meta content="text/html; charset=utf-8" http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
<p>Garry C. Hess invented the delay spread calculation described in
TSB-88. Modern propagation prediction software used by Harris and
Motorola employ this method along with monte carlo simulation to
depict TDI regions in multiple site simulcast. Regarding a
specific acceptable TDI value, the results are affected by number
of overlapping signals three or more require tightening up the
delay spread. Also narrow band signals are more susceptible, have
worse (higher) capture ratios.<br>
</p>
<br>
<div class="moz-cite-prefix">On 3/14/2017 5:55 PM, Hayden Honeywood
wrote:<br>
</div>
<blockquote
cite="mid:CAC0VLD1sTyqw1k8S4LTTkO-M7Ac3FWdsKxMTsxhkDk6ks5ZAeg@mail.gmail.com"
type="cite">
<div dir="ltr">
<div class="gmail_extra">Really interesting thread so far. </div>
<div class="gmail_extra">Tim I was getting those figures from an
article I read here - </div>
<div class="gmail_extra"><a moz-do-not-send="true"
href="http://urgentcomm.com/networks_and_systems/mag/designing_simulcast_networks_1101">http://urgentcomm.com/networks_and_systems/mag/designing_simulcast_networks_1101</a><br>
</div>
<div class="gmail_extra"><br>
</div>
<div class="gmail_extra"><span
style="color:rgb(51,51,51);font-family:georgia,times,"times
new roman",serif;font-size:15px">"Analog FM systems on
25 kHz channels typically can withstand two relatively
strong, equal amplitude signals with up to 150 microseconds
relative delay before speech is unintelligible, according to
Garry C. Hess in </span><em
style="color:rgb(51,51,51);font-family:georgia,times,"times
new roman",serif;font-size:15px">Land-Mobile Radio
System Engineering"</em><br>
</div>
<div class="gmail_extra"><br>
</div>
<div class="gmail_extra">
<div class="gmail_extra">I have used radio mobile quite a lot.
It might be time to ascertain my coverage. The only gripe I
have with Radio Mobile is that it overestimates at low band
VHF by default. UHF coverages are pretty accurate in my
opinion. I've also used Splat, and still use Splat to
overlay onto Google Earth.</div>
<div class="gmail_extra"><br>
</div>
<div class="gmail_extra">Do you change the strong signal
margin on one site in Radio Mobile to 0dB/20dB for the 10dB
difference, then plot the two together?</div>
<div class="gmail_extra"><br>
</div>
<div class="gmail_extra">Hayden </div>
<div class="gmail_extra"><br>
</div>
<div class="gmail_extra"><br>
</div>
</div>
<div class="gmail_extra"><em
style="color:rgb(51,51,51);font-family:georgia,times,"times
new roman",serif;font-size:15px"><br>
</em></div>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
App_rpt-users mailing list
<a class="moz-txt-link-abbreviated" href="mailto:App_rpt-users@lists.allstarlink.org">App_rpt-users@lists.allstarlink.org</a>
<a class="moz-txt-link-freetext" href="http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app_rpt-users">http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app_rpt-users</a>
To unsubscribe from this list please visit <a class="moz-txt-link-freetext" href="http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app_rpt-users">http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app_rpt-users</a> and scroll down to the bottom of the page. Enter your email address and press the "Unsubscribe or edit options button"
You do not need a password to unsubscribe, you can do it via email confirmation. If you have trouble unsubscribing, please send a message to the list detailing the problem. </pre>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
Joe Leikhim
Leikhim and Associates
Communications Consultants
Oviedo, Florida
<a class="moz-txt-link-abbreviated" href="mailto:JLeikhim@Leikhim.com">JLeikhim@Leikhim.com</a>
407-982-0446
<a class="moz-txt-link-abbreviated" href="http://WWW.LEIKHIM.COM">WWW.LEIKHIM.COM</a></pre>
</body>
</html>