Re: [TenTec] STANDARDISATION OF S-METER READINGS

["Merle Bone" <merlebone@charter.net>]

The Orion's S-meter calibration certainly isn't anything to "write home about," 
but it is "representative" of the distant stations signal strength. 
Running V1.373b5 I get the following readings using calibrated signal generator 
and attenuator on 14.058 MHz:

Sig Level      Preamp On             Preamp Off            "Standard Reading"

50 microvolts         S9+11              S8.1                                 S9
-6dB                        S9                    S7                            
         S8
-12dB                      S8.1                 S5.5                            
      S7
-18dB                      S7                    S4.5                           
       S6
-24dB                      S5.8                 S3                              
        S5
-30dB                      S4.5                 S2                              
        S4
-36dB                      S3.1                 S2                              
        S3
-42dB                       S2.1                S1.8                            
       S2
-48dB                       S1.8                S1.8                            
       S1

S1.8 is about as low as the S-meter goes on this release of the firmware with 
the RF gain at 100 and the AGC threshold set for .36 microvolts and the decay 
set for 200dB/s.  I use the "calibrated measurements" when I am trying to 
understand antenna performance - particularly "front to back/side" measurements.
73, Merle - W0EWM
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