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R: S units



Hello Gerry K6TXD,

>From the "VHF MANAGERS' HANDBOOK " of IARU Region-1:

Standardization of S-meter Readings

At the IARU Region-1 Conference in Miskolk-Tapolka (1978)
following recommendation was adopted:

IARU Region-1 adopts as a provisional standard the value of 6 dB
for the "S-point", and this value will be recommended to manufacturers
of equipments.

At the meeting of the IARU Region-1 VHF/UHF/SHF Committee in
Dusseldorf (April 1989) the following recommendation was adopted,
ad later approved by the IARU Region-1 Executive Committee:

The S 9 reference level for frequency bands above 144 MHz is -93 dBm
available signal power at the receiver input. 
                                           --------------------------------

Please note that -93 dBm is the power applied to the receiver input and not
the power indicated by your signal generator  with open output.

73" de

i8CVS Domenico 


----- Original Message ----- 
From: Gerald Horn <ghorn666@earthlink.net>
To: <amsat-bb@AMSAT.Org>
Sent: Monday, October 06, 2003 5:55 AM
Subject: [amsat-bb] S units


> Hello
> 
> Is there a definition of what an S unit is. I am building a home brew
> receiver and I don't know what to calibrate the meter to.
> 
> gerry k6txd
> ----
> Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
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> 





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