[PCR-1000] Newbie Question

Tue, 7 Jan 2003 17:31:40 +0200

Hi Ed
Great explanation thanks.
How can i recognize an RTTY or FAX transmission just from listening to the
audio? 

-----Original Message-----
From: Hare,Ed, W1RFI [mailto:[email protected]]
Sent: Tuesday, January 07, 2003 5:18 PM
To: [email protected]
Subject: RE: [PCR-1000] Newbie Question

Hi, Bill,

WFM is wideband FM. This is the FM signal you will find in the FM broadcast
band.

NFM is narrowband FM. This is the FM signal you will hear on amateur
repeaters and some business communications.  This signal will be common on
VHF and up.

AM is amplitude modulation. This is the type of signal you will find in the
AM broadcast band, and most international shortwave transmissions.

USB and LSB are upper sideband and lower sideband, respectively. This is a
form of AM in which the carrier signal and one of the sidebands have been
removed.  If you listen to SSB (single sideband) on an AM receiver, it
sounds muffled and distorted. A receiver that uses a "beat-frequency
oscillator" reinserts the carrier at the receiver detector and the signal
once again sounds like normal audio.  You will find SSB stations on the
amateur bands and spread throughout the shortwave spectrum.

CW is continuous wave. It is generally used to describe a Morse-code
transmission using on/off keyed CW.  It is used on most amateur bands, and
is common on MF/HF (the 1.8-28 MHz amateur bands).

FSK is frequency-shift keying. It is used for various digital transmissions,
such as radioteletype (RTTY).  You will find this type of signal on all of
the MF/HF bands, although not all can be decoded by the PCR-1000.

73, 
Ed Hare, W1RFI
ARRL Lab
225 Main St
Newington, CT 06111
Tel: 860-594-0318
Internet: [email protected]
Web: http://www.arrl.org/tis

> -----Original Message-----
> From: Bill & Tammie [mailto:[email protected]]
> Sent: Monday, January 06, 2003 9:51 PM
> To: Undisclosed-Recipient:;@mailman.qth.net
> Subject: [PCR-1000] Newbie Question
> 
> 
> Can someone explain the basic of these    
> (WFM,LSB,USB,AM,CW,FSK,NFM) on how
> I should use each of these when scanning? I have the book "Now You're
> Talking" on the way in the mail but it won't get here before 
> my PCR-1000
> arrives. Is there a web site out there that can give me the basic?
> 
> Thanks alot,
> Bill
> 
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