The spectrum of an Orion2 keyed at full power on 14 MHz.
The time constant is set to 5 ms, the default setting.
The serial number is 09C1096 and the software version 2.37.
Amplitude and frequency as a function of time.
The orion is keyed in the same way as in the spectrum above.
The time from 10% to 90% is 1.6 ms and the time from
the onset to full power is about 3.6 ms.
The time constant 5 ms is the shortest key closure time
that will generate a morse code dot at nearly full power.
This corresponds to about 1100 letters per minute.
At this setting the keying speed should not exceed
about 200 letters per minute.
A speed that few operators run above except for high speed
meteor scatter on VHF bands.
(Not common any more because of digital modes.)