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RX gain calibration enhancement

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Brett Howard

RX gain calibration enhancement

So if someone has the 50uV elecraft generator (and can do 1uV as well)
why can't the gain calibration feature also calibrate the S-Meter as
well? Just add the insertion of a 1uV signal after the 50uV signal
allows the rig to linearize things and set the S9 point and then you can
set your offset and slopes and what not...

~BTH

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Guy, K2AV

Re: RX gain calibration enhancement

The RF Gain procedure does not presume the XG1/2, but is written for any
50uv source available. If the procedure combines those two signal levels,
then equipment capable of supplying both 50uv and 1uv is necessary to run
the RF Gain calibration at all.

It works very well btw. S meter is now linear from S0 to 60 over after RF
gain calibration. It had been cramped above S9 where only 30 dB increase
would take it to 60 over on the meter. Now 6 db per click below S9 and 5 db
per click above. Nice.

I have both an XG1 and an XG2. Going to put a 160m crystal in the XG1. Need
portable, stable signal source on 160.

73, Guy.

On Thu, Oct 8, 2009 at 4:34 AM, Brett Howard <[hidden email]>wrote:

> So if someone has the 50uV elecraft generator (and can do 1uV as well)
> why can't the gain calibration feature also calibrate the S-Meter as
> well? Just add the insertion of a 1uV signal after the 50uV signal
> allows the rig to linearize things and set the S9 point and then you can
> set your offset and slopes and what not...
>
> ~BTH
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

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Brett Howard

Re: RX gain calibration enhancement

It wouldn't have to require you to have a 1uV signal generator all it would have to do is allow you to skip that step if you didn't have that piece of equipment.
Sent from my Verizon Wireless BlackBerry

-----Original Message-----
From: Guy Olinger K2AV <[hidden email]>
Date: Thu, 8 Oct 2009 10:35:37
To: Brett Howard<[hidden email]>
Cc: <[hidden email]>
Subject: Re: [Elecraft] RX gain calibration enhancement

The RF Gain procedure does not presume the XG1/2, but is written for any
50uv source available. If the procedure combines those two signal levels,
then equipment capable of supplying both 50uv and 1uv is necessary to run
the RF Gain calibration at all.

It works very well btw. S meter is now linear from S0 to 60 over after RF
gain calibration. It had been cramped above S9 where only 30 dB increase
would take it to 60 over on the meter. Now 6 db per click below S9 and 5 db
per click above. Nice.

I have both an XG1 and an XG2. Going to put a 160m crystal in the XG1. Need
portable, stable signal source on 160.

73, Guy.

On Thu, Oct 8, 2009 at 4:34 AM, Brett Howard <[hidden email]>wrote: