[SBE] Spectrum Analyzer for AM NRSC measurements

[Daniel L. Davis]

I made a typo on the model number of the suggested spectrum analyzer.  It is
an Anritsu MS2721B.  By the way, I highly recommend springing for the
tracking generator option.  Whenever measuring harmonics, it is useful to
insert either a band-rejection filter or a band-pass filter to prevent the
fundamental or other strong signals from overloading the analyzer, causing
false indications.  The tracking generator can be used to tune the filter,
prior to making measurements.  The addition of a directional coupler will
allow you to make return loss measurements on an antenna system, if you have
the tracking generator.

Dan Davis

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SBE Roundtable

Today's Topics:

   1. Spectrum Analyzer for AM NRSC measurements (Daniel L. Davis)
   2. Re: Spectrum Analyzer for AM NRSC measurements (Bob Reite)
      (Barry Thomas, CPBE CBNT)


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Message: 1
Date: Thu, 26 May 2011 10:24:43 -0400
From: "Daniel L. Davis" <dldavis at dsquaredbroadcast.com>
Subject: [SBE] Spectrum Analyzer for AM NRSC measurements
To: "sbe at sbe.org" <sbe at sbe.org>
Message-ID: <B9.D7.28449.4A26EDD4 at cm-omr13>
Content-Type: text/plain; charset="windows-1252"

I have been very well pleased with the Anritsu 8721B.  It is also excellent
for FM and IBOC measurements.  I was a bit disappointed with Anritsu's
service, however.  When I sent the unit in for calibration, they told me
that it needed repair, to the tune of $3000.  Additionally, the manufacturer
itself did not have the parts for a current instrument, which caused a delay
in getting my unit back in service.

Dan

Daniel  L. Davis, CPBE
D Squared Broadcast Technologies, Inc.
PO Box 48
Madison, GA 30650
Voice:  706-342-4474
Fax:  706-752-1879
Email:  dldavis at dsquaredbroadcast.com

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Message: 2
Date: Thu, 26 May 2011 09:57:30 -0700 (PDT)
From: "Barry Thomas, CPBE CBNT" <barryt at barryt.org>
Subject: Re: [SBE] Spectrum Analyzer for AM NRSC measurements (Bob
	Reite)
To: sbe at sbe.org
Message-ID: <563741.30343.qm at web605.biz.mail.mud.yahoo.com>
Content-Type: text/plain; charset="us-ascii"

Bob;

A very useful resource would be this
document: http://www.nrscstandards.org/SG/NRSC-G201-A.pdf  which is the
NRSC's guideline for NRSC measurement methods


Annex 2 includes a list of analyzers that have certified that they are
suitable for NRSC measurements, particularly if IBOC is used.



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Message: 2
Date: Wed, 25 May 2011 22:16:28 -0400
From: Bob Reite <br at telcen.com>
Subject: [SBE] Spectrum Analyzer for AM NRSC measurements
To: sbe member discussion mail list <sbe at sbe.org>
Message-ID: <4DDDB7FC.5060804 at telcen.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Well, it looks like my venerable HP 8562A has bit the dust, and while 
I've been told it may be repairable, I'm considering replacement.  The 
question for members of the list who do annual NRSC measurements on AM 
stations, what make and model of spectrum analyzer are you using now? 
Any recommendations?  I will probably rent an Anritsu MS2721B to get 
this years measurements done on time, but I'm not ready to spring for 
that purchase if my old unit is repairable or there is a less expensive 
newer unit that will do the job.


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