Merle:
That's far more accurate that the Orion II S-meters The difference may be
caused by a different type of AGC implementation in the version 2 firmware.
It would be interesting to get numbers from Orion I owners using v. 2
firmware. You're right about needing an accurate meter when judging antenna
performance. A good S-meter is a valuable tool!
Ron N6IE
www.N6IE.com
----- Original Message -----
From: "Merle Bone" <merlebone@charter.net>
To: <tentec@contesting.com>
Sent: Thursday, January 10, 2008 11:38 AM
Subject: Re: [TenTec] STANDARDISATION OF S-METER READINGS
> 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
> _______________________________________________
> TenTec mailing list
> TenTec@contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
>
_______________________________________________
TenTec mailing list
TenTec@contesting.com
http://lists.contesting.com/mailman/listinfo/tentec
|