evertz EQT Series, System Manual

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EQT Router User Manual
Page 16
Revision 1.9.1
2.8. REFERENCE
2.8.1. Video Reference
There must be an analog reference present to ensure the crosspoint changes occur during the field-
blanking interval. If the reference is missing then the routing will occur asynchronously. If you
experience problems with clean switching then refer to application note AN-0008.
The reference signal should be connected to the Ref 1 input and this is terminated in 75R. The Ref 2
connector is a passive loop-through. The EQT rear panel is fitted with two LEDs to monitor the
reference connection.
REF LOCK: This Green LED is ON when there is a valid reference present on the REF BNC.
This LED is OFF when no reference is being applied.
GEN ERROR: This Red LED is ON when there is an error detected with the reference on the
REF BNC. This LED is OFF when the detected reference is valid.
2.8.2. Selecting Whether the Video Reference is Terminated
TERM: The REF TERMINATION jumper J21 located at the rear of the main module is
used to terminate the reference loop input. When it is in the 75R position a 75
ohm terminating resistor will connect the input to ground. When it is in the HI-Z
position the reference input will be high impedance.
2.9. POWER SUPPLY
The EQT router power supplies operate on 100 to 240 volts AC at 50 or 60 Hz and automatically sense
the input voltage. Power should be applied by connecting a 3-wire grounding type power supply cord to
the power entry module on the rear panel. The power cord should be a minimum 18 AWG wire size;
type SVT marked VW-1, maximum 2.5 m in length.
CAUTION - TO REDUCE THE RISK OF ELECTRIC SHOCK, EARTHING OF THE
EARTH PIN OF THE MAINS PLUGS MUST BE MAINTAINED
For NEBS compliant installations, the AC power cords of the EQT Series
Router shall be connected to an external surge protection device (SPD).
The power entry modules contain a standard IEC power inlet connector and an EMI line filter. A
separate fuse holder is located inside the power supply module.
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Note: GEN ERROR indicator is not available in EQT-1602-CS, EQT-3204-CS
and EQT-3224 newer rear plates.