Monitor Connection; Modem And Vlp Connection - NCR PC4I Technical Reference

VIDEOTEX
MONITOR CONNECTION
Monitor connection is illustrated in Figure 10.3.
Pin
Signal
1 RED
5
,
2
GREEN
3
BLUE
4
TCS/
0
0 0 0
5
GND
6
SWITCH VIDEOTEX-PC
9 6
7
SWITCH VLP-VIDEOTEX
8 FBAS
9
HORIZ. FRBl SWITCH 18-15 KHz
Figure 10.3 Monitor Connector
Note: TCS/ provides synchronization for RGB signals.
Pin 6 is high for Videotex
Pin 7 is high for Videotex RGB input, low for composite
signal from VLP
FBAS is composite signal from VLP (75 Ohm)
Pin 9 is high for 18 KHz
MODEM AND VLP CONNECTION
The Videotex adapter is designed to work with three
types of modem (suitable cables are identified in
parentheses):
1 Full duplex with auxiliary data line, manual
dialling (K301, or K303 with connection for
video player).
Baud rate: Receive= 1200, Transmit= 75
2 Full duplex, manual dialling (K301, or K303 with
connection for video player)
Baud rate: Receive= 1200, Transmit= 1200
10-4