Re: Calibrate S meter?
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BTW, when doing something "sensitive" like this, if your computer is close by, turn it off. Eary in the T41 development, I was really disappointed in the noise it was picking up. Then in a "duh" moment I remembered the old Target game I used to play on my SOL-20/Z80 machine. You could put a broadcast radio nearby and add "sound effects" to the game being played on the screen by listening to the S100 buss signals through the radio. I turned off my computer and looked at the T41 noise level...MUCH better! Jack, W8TEE
On Sunday, February 9, 2025 at 01:25:30 PM EST, K9HZ <bill@...> wrote:
Yeah and make sure you do it with the attenuator at ZERO!? THEN go ahead and calibrate the RX attenuation control. Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois Owner ¨C Operator Villa Grand Piton ¨C J68HZ Soufriere, St. Lucia W.I. Rent it: www.VillaGrandPiton.com Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. email:? bill@... -----Original Message-----
From: [email protected] <[email protected]> On Behalf Of jerry-KF6VB Sent: Sunday, February 9, 2025 12:23 PM To: [email protected] Subject: Re: [SoftwareControlledHamRadio] Calibrate S meter? On 2025-02-09 10:11, jjpurdum via groups.io wrote: > No. It is an approximation based on comparing S signals on commercial > rigs with the T41 reading. At the time the S-meter was coded, its > accuracy was pretty far down the list of things to do, *** Makes sense.? That's actually what I figured :).? I think such calibration would need to be per-band. ? ? ? ? ? ? ? ? ? - Jerry, KF6VB -- Jack, W8TEE |
jjpurdum