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<body class='hmmessage'><div dir='ltr'>Unless you have a particularly quirky receiver, leave it at 0.<br><br>Quoting from the source kit (README-DSPBEW):<br><br><pre><i>Baseband Examination Window
Typically, the discriminator of an FM communications receiver produces
results containing audio spectrum from the "sub-audible" range
(typically < 100 Hz) to well above frequencies able to be produced by
modulating audio. These higher frequencies can be utilized to determine
signal quality, since they can only contain noise (or no noise, if a
sufficiently strong signal is present).
For receivers (such as the Motorola Quantar, etc) that do not provide
sufficient spectral content at these "noise" frequencies (for various
reasons), The "DSP/BEW (Digital Signal Processor / Baseband Examination
Window)" feature of the RTCM firmware may be utilized.
These receivers are perfectly capable of providing valid "noise" signal
with no modulation on the input of the receiver, but with strong
modulation (high frequency audio and high deviation), it severely
interferes with proper analysis of signal strength.
This feature provides a means by which a "Window" of baseband (normal
audio range) signal is examined by a DSP and a determination of whether
or not sufficient audio is present to cause interference of proper
signal strength is made. During the VERY brief periods of time when it
is determined that sufficient audio is present to cause interference,
the signal strength value is "held" (the last valid value previous to
the time of interference) until such time that the interfering audio is
no longer present.
The DSP/BEW feature is selectable, and should not be used for a receiver
that does not need it.</i></pre><br><br><div><div id="SkyDrivePlaceholder"></div>> From: bill.hurlock@cpcomms.com<br>> To: app_rpt-users@ohnosec.org<br>> Date: Tue, 19 Mar 2013 18:21:50 +0000<br>> Subject: [App_rpt-users] RTCM Parameter question<br>> <br>> I can't seem to find any reference to what item 17 does in the RTCM setup menu. It says DSP/BEW and appears to have 2 choices 0 or 1.<br>> <br>> Bill Hurlock<br>> CPCommunications<br>> 856-234-1661 Home Office<br>> 856-264-1010 Cell<br>> 914-345-9292 Ext.429<br>> www.cpcomms.com<br>> WA2TQI<br>> <br>> Providing Solutions for Audio and Video Communications<br>> <br>> <br>> <br>> _______________________________________________<br>> App_rpt-users mailing list<br>> App_rpt-users@ohnosec.org<br>> http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users<br></div> </div></body>
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