evertz EQT Series, System Manual

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EQT Router User Manual
Revision 1.9.1
Page 11
The rear of the EQT has one BNC connector to allow connection to one terminated external Q-Link. Q-
Link is a dedicated control system specific to Evertz brand of Quartz products. The Q-Link system
works as a single transmission line with devices connected along the length of the cable. It must be
terminated at either end in 75
Ω.
2.3.4.1 Manual Remote Control - Using Q-Link
All EQT routers can be connected to remote control panels by a single coaxial link called Q-Link. This
link uses standard 75Ω video cable daisy-chained from panel to panel over a maximum cable length of
500m. Each end of the link must be terminated in 75
Ω
.
This daisy-chain method ensures the best transmission quality of the control signals down the cable.
Short cuts that might save cable (i.e. running stubs to some panels) are not recommended as this may,
under certain circumstances, cause data errors.
Each unit being connected to the Q-Link has its own address switch, which is set up as part of the
system configuration.

Note: Further technical information regarding the EQT can be found in section
0 of the manual.
2.4. SERIAL CONNECTIONS
The rear panel of the EQT has one DB9 female serial connector. The EQT supports Quartz(-1) protocol
commands over the serial port. For information regarding the Quartz protocol, contact Evertz service.
The pin-out for the serial port is shown in Table 1 below:
RS422
9 WAY FEMALE D-TYPE
PIN SIGNAL
1 0V
2 Tx+
3 Rx+
4 0V
5 -
6 0V
7 Tx-
8 Rx-
9 -
Table 1: RS422 Pin Out

Note: The installer must fit a 75
Ω
terminator at each end of the cable.