I could sure use asimple-minded explanation of how to connect my
dual-trace scope in order to get a display of system timing. The
description below, while I'm sure it is correct, doesn't get this
history major far enough.
73, Pete N4ZR
Check out the Reverse Beacon Network at
http://reversebeacon.net,
blog at reversebeacon.blogspot.com.
For spots, please go to your favorite
ARC V6 or VE7CC DX cluster node.
On 12/13/2012 2:15 PM, Paul Christensen wrote:
A scope isn't going to tell all but it
tells a lot about a signal. They're not difficult to use
and don't have to cost a lot.
It doesn't take long to find some incredibly good buys on used
Tektronix scopes -- and at a price about half of the popular high-end
wattmeters. Folks have no problem paying $600 for a wattmeter with
unnecessary high accuracy, but seem to find no need for a scope. Is
it the number of controls that's so intimidating?
The dual trace function isn't required to determine if hot-switching
occurs, but is required to measure system timing. For station
monitoring here, the scope's Channel A is set to trigger on the
keyer's output while Channel B samples RF. This setup makes it easy
to replicate the same CW waveform measurement as shown in the QST
Product Reviews. By triggering the scope from the keyer, the waveform
stays in place for timing measurements without having to chase it with
the scope's variable time-base control.
Paul, W9AC
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