X1200 Series Router Manual
SERIAL CONTROL
Revision 1.3.2
Page 5-1
5. SERIAL CONTROL OF THE ROUTERS
5.1. GVG TEN-XL ASCII PROTOCOL
The following sections are provided as a technical reference for programmers who want to write their own
software to control the Evertz X1200 series routers using the GVG TEN-XL ASCII command protocol.
There are some hardware differences between the X1200 series routers and the Grass Valley TEN-XL
routers which have required differences in implementation of the protocol for the X1200 series routers.
The GVG Ten XL protocol allows multiple devices to be addressed on a multi-drop serial connection. The
GVG TEN-XL protocol was originally designed to control 10 x 1 routers, therefore each video buss (with its
associated audio busses) in the X1200 routers has its own address. In the X1202 routers, these
addresses are the one set in the Serial Address menu item and the next high number. (i.e. if the Serial
Address menu item is set to 10, then address 10 will correspond to video buss 1 and its associated audio
busses, and address 11 will correspond video buss 2 and its associated audio busses. In the X1201
routers only the serial address set in the Serial Address menu is used.
Some implementations of the GVG Ten XL protocol only allow one device to be addressed on a single-
drop serial connection. These implementations use address 0 only. When controlling X1201 routers from
single drop GVG protocol, set the Serial Address to 0. In the X1202 routers, special provisions have been
made to override the programmed Serial Address and re-direct the control to either video buss. Setting
one or two of the GPI Inputs to one of the 10XL Redirect GPI Input functions can accomplish this. When
one GPI is pulled to ground, all serial commands to address 0 will control the respective video buss,
regardless of the setting of the Serial Address menu item. To control the other video buss, ground the
other GPI input. If both GPIs are active at the same time the higher GPI number will have priority. If you
set the Serial Address to 0, and one GPI is programmed to the 10XL redirect V2 function, serial
commands will control V1 buss when the GPI is inactive, and the V2 buss when the GPI is active.
When the X1200 series router is operating in the master mode, it will send out commands to the router
that matches its serial addresses. When the X1200 series router is operating in the slave mode, it will only
respond to commands that match its serial addresses. If two X1200 series routers are connected in a
master/slave configuration, then the addresses of both routers must be set the same.
The Setup Menu in the router must be used to configure the REMOTE CTL port. See section 3.14 for
information about configuring the serial port.
5.1.1. Serial Data Format
In GVG’s TEN-XL ASCII protocol all words sent and received use the following format:
Standard: RS-232 (Can be set to RS-422 by changing internal Jumpers (See section 2.4.2)
Data Rate: Default 38400 Baud (Can be set using the Baud Rate menu item)
Data Format: Default 8 data bits, even parity, 1 stop bit (Can be set using the Serial Format menu item)
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