The first thing you should do when you run CW is to calibrate the code speed
to suit the clock speed for your computer and to account for any memory
resident programs which you have loaded. Each time you change the memory
resident program enviroment you will need to recalibrate code speed. When
doing so use the following procedure:

1. Use the

arameters command and the peed subcommand to set the
code speed to a multiple of 10 words per minute (20 or 30 are most
convenient). Set the send speed, character speed, and word speed to the same
value.

2. Select the tilities command on the main menu and the peed
test subcommand.

3. Using a clock or watch with a sweep second hand, count the number
of times the standard word PARIS is sent in exactly one minute. If the
number matches the code speed set in step 1, then no further calibration
is necessay. The count is not automated since the counting process would
consume time and thus render the result innacurate.

4. If the number of words and code speed do not match, then use the
tilities command and iming subcommand to set the timing constant.
Increasing the number slows the send speed down, and vice versa. Using a
PC with a clock speed of 4.77 MHz. and with no memory resident programs
installed, the author has found that a timing factor of about 1075 produces
the correct speed.

5. Repeat steps 1-4 until the code speed shown at the bottom of the
screen matches the number of words sent in one minute.

In counting the number of times PARIS is send, be sure to include the
last word space as part of the last PARIS. In other words, if you are
attempting to calibrate at 20 words per minute, start timing when the first
word is sent and stop timing when the 21st word starts.

On my Zenith Z-150 running at 4.77 MHz. and with no memory resident
programs installed, the timing factor is about 1080. With several memory
resident programs installed, the timing factor decreased to about 620.