I wanted to see if v2.059d improved the accuracy of the cw rise/fall
time setting, so I took a scope home this weekend and looked:
Rise time results in ms, average of 5 measurements:
Indicated Measured
3 2.1
4 2.7
5 3.4
6 4.0
7 4.7
8 5.3
9 6.0
10 6.6
Generated dits with internal keyer into a Bird Termaline load at 7.035
MHz. Sampled with 7:1 resistive divider (3500 ohm total) across load,
measured with Tek TDS210 with sweep of 500us/div or 1ms/div, depending
on setting. Vertical scale at 1V/div and output power adjusted to fill
screen, power setting was "42". Tried to be careful with placement of
cursor for measurement, but numbers probably no better than +/- 0.2
ms.
Bob NW8L
_______________________________________________
TenTec mailing list
TenTec@contesting.com
http://lists.contesting.com/mailman/listinfo/tentec
|