An SSB signal that is S9 on the K3's S-meter is not going to measure S9 on the P3.
The reason is that an SSB signal has bandwidth, and the sum of all of the signal within that bandwidth is what the K3's S-meter reads. You would have to add up all of the power of the SSB signal on the P3's display to equal S9. This mathematical operation is called integration. The P3 does not do integration. Therefore, make all of your calibrations with CW signals, and live with the apparent discrepancy on SSB. Al W6LX ________________________________ From: Roy Morris <[email protected]> To: [email protected] Sent: Sun, January 16, 2011 3:28:53 PM Subject: Re: [Elecraft] P3 S meter variance I have found that -8.9 LVL CAL (transfer gain) is the setting for an S9 reading on my P3 using my XG-1. The readings track right well as long as they are not stronger than S9+20. Signals over this on the K3 S meter are just not correct on my P3. If I change the LVL CAL (transfer gain) to around -27, the strong signals are then correct. This tells me there are no absolute settings that will make the P3 correct at all SSB signal strength levels. YMMV - Your LVL CAL settings will no doubt be different from mine. Roy Morris W4WFB ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
