Service manual

IM1035
Section 1
GENERAL INFORMATION
1.1 GENERAL DESCRIPTION
The TV 50, 90 and 120 series monitor is a raster scan display designed speci-
fically for data terminals. They are designed for high quality display of alpha-
numeric dot characters.
The data monitor accepts video, horizontal drive and vertical drive as separate
TTL level signals, eliminating stripping circuits in the data display unit as
well as mixing circuits in the external logic interface.
The 100% solid state silicon circuitry of the PWA provides cool operation and
high reliability. The electronic package.has been miniaturized for compati-
bility with small volume requirements.
1.2 ELECTRICAL SPECIFICATIONS
1.2.1 Input Data Specification
PWB Edge Input Connector: Viking - 2VKlOS/1-2
Ampheno1 - 225-21031-101
Cinch -
250-10-30-170
BBRC No. - 1-039-0119
Video Input Amplitude Low
High
0.0 + 0.4 - 0.0 volts
4.0 ± 1.5 volts
Video Pulse Width
Vertical Drive Rate
Horizontal Drive Rate
Rise and Fall Times
Input Signal Format
50ns or greater
49 to 61 Hz
15,250 to 16,250 Hz
Video
Vertical
Horizontal
Less than 20ns
Less than lOOns
Less than SOns
Refer to figure 1-1
1.2.2 Data Display Specifications
Input Impedance:
Video
Input (Class A)
Vertical Drive Input
Horizontal Drive Input
Min Shunt
Resistance
4k
1.2k
5l0n
Max Shunt
Capacitance
40-60pF
40pF
40pF
1-1