Tandy CM-5 - Technical Information

Technical Information
The CM-5 is designed for connection to a non-interlaced 225 line signal, 15.701 kHz
scanning frequency.
When the CM-5 is connected to a computer with an input signal other than that
specified, distortion in display image, shape, and position may occur. The following
chart illustrates such conditions.
Symptom
Cause
Symptom
Cause
Display area is spread
horizontally.
Display area is
spread vertically.
Display time is
over 44.5ms
c
\
J
Vertical frequency
is below 60 Hz
Display area is too
narrow.
Display area is
positioned toward
the top.
Display time is
under
44.5ms
Back porch time is
under
1.6 ms
Display area is
positioned too far to
the right.
Display area is too
far toward the
bottom.
Front porch time
is less than
6.7 ms
Front porch time
is under
0.6 ms
Display area is too
far to the left.
Picture moves from
side to side.
Back porch time
is less than
7.8ms
Horizontal sync is
not within the
range of 15.701 kHz
± 0.3 kHz
Display area is
reduced vertically.
Display area rolls
up and down.
Vertical frequency
is over 60Hz
Vertical sync is
not within the
range of 57-63Hz
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