Printer; Videotape Recorder - Videotec SW164OSM Manuel D'instructions

4.6.4.3 Printer

The SW164OSM matrix allows for the optional control of a serial printer or of the
switching controlled by a VTR trigger. N.B.: if the recognition of the VTR trigger is enabled,
the printer is automatically disabled!
Please check on printer User Manual:
• if it is controllable via RS232 (serial communication)
• Printer baudrate (300, 1200, 2400 or 9600 baud).
Considering the small number of characters sent, no handshake protocol between the
matrix and the printer is provided: the latter is considered as always connected and ready.
Check the baudrate: it must be as defined in matrix configuration (menu 7.4 Other
parameters, Printer Baudrate).
The heading "Printer baudrate" is shown in the menu only if the VTR trigger is not used :
in the opposite case, a warning message warns of the impossibility of controlling the
printer.
Connection between DB25 connector and printer serial connector
DB25 matrix
pin 22 - Transmission
pin 23 - Mass GND

4.6.4.4 Videotape recorder

Check on the videotape recorder manual that the latter may supply an open
collector or TTL trigger impulse; the impulse is recognised on the falling edge.
DB25 matrix
Pin 18 - Trigger
Pin 23 - Mass GND
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Page 18
DB25 printer (Standard)
pin 3 - Reception
pin 7 - Mass GND
VTR
Trigger TTL/Open Collector
Mass GND
SW164OSM 9901