Radio Shack TRS-80 Service Manual page 82

FUNCTIONAL SPECIFICATIONS
The video monitor is a 12-inch solid state monitor designed
for display of alphanumeric dot characters. The monitor is
designed for a 12-volt DC power input with an average
power consumption of 12 watts. The monitor accepts sep·
arate video, and vertical drive TTL level inputs.
SPECIFICATIONS
Cathode Ray Tube:
Enviroment:
Power Input:
TTL Level
Input Signals:
Video Response:
Scanning Frequency:
Horizontal Retrace:
Vertical Retrace:
12" diagonal, 90
0
deflection angle, 4 x 5 aspect ratio, P4 phosphor,
integral implosion protection.
Operating Temperature: 41°F to 131°F (50C to 55
0
C) ambient
Humidity: 95% non-condensing at 41
0
F to 104
0
F (5°C to 40°C)
Operating Altitude: 10,000 ft. (3046 metersl maximum
+12 VDC at 1 amp nominal
4 volts
±
1.5 volts
Horizontal: 4 to 25J,Lsec, positive going
Vertical: 100 to 1400J,lSec, negative going
Video: positive white
Bandwidth: 15 MHz, 3 dB
Pulse rise time less than 30nsec
Horizontal: 15.600 Hz
±
500 Hz
Vertical: 50/60 Hz
10.5,usec maximum
850,usec maximum
75