Cheetah 64NEX, User Manual

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Cheetah 64NEX Digital Video Router
Publication 81-9059-0685-0, Rev. A
March 2011
Proprietary Information of PESA 4-8
T
ABLE
4-2 COM1 and COM 2 Pin Assignments
Pin Signal In/Out
1 CD Input
2 RX Input
3 TX Output
4 DTR Output
5 Ground ---
6 DSR Input
7 RTS Output
8 CTS Input
9 RI No Connect
•
COM 1 is the primary RS-232 CPU Link and may be connected with a null modem cable
(Part No. 81-9028-0393-0) to an external control device, using the P1E protocol at either
9600 or 38,400 baud. Set the baud rate with a switch on the controller board. Make sure
the communication rate for COM 1 in the system controller software matches the baud rate
you are using (in the software, select
System > Communications ).
•
COM 2 is a secondary RS-232 CPU Link, which may also be connected to a PC or an
external control device. COM 2 may be used with either of the protocols shown in Table
4-3 and may operate at either 9600 or 38,400 baud. Set the baud rate with a switch on the
controller board. Make sure the communication rate for COM 2 in the system controller
software matches the baud rate you are using (in the software, select
System >
Communications
).
T
ABLE
4-3 PESA CPU Link Protocols
PROTOCOL DOCUMENT #
CPU Link Protocol No. 1 Extensions (P1E) 81-9062-0408-0
Unsolicited Status Protocol (USP) 81-9062-0409-0