[Elecraft] P3: Left span limit changes

[Fred Jensen]

1. Serial path is PC-->P3-->K3

2. VFO-A is on 14028.000 CW

3. VFO-B is on 14300.000 SSB

4. P3 is in fixed-tune mode [cursor moves, screen edges remain at fixed 
frequencies as I tune], SPAN=20 KHz, left edge is 14020.000

5. Tap A/B

6. K3 goes to 14300.000 SSB, left edge of P3 is 14300.000, span is still 
20 KHz. So far, so good

7. Tap A/B again

8. Radio goes back to 14028.000 CW, span is still 20 KHz, but left edge 
is now 14025.000 [instead of 14020.000 that it was].

Why does the P3 span shift up 5 KHz after switching VFO's?

73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County