Introduction – Cobalt Digital COMPASS 9121 3G_HD_SD-SDI_ASI Redundancy Switch User Manual
Page 11
9121-OM (V1.2)
9121 PRODUCT MANUAL
1-7
Introduction
Technical Specifications
Switchover Triggering
Selectable automatic failover upon loss of valid SMPTE 425M,
292M, or 259M formatted signal. Manual switchover using
DashBoard remote control or GPI.
Note: Automatic failover operation is specified for supported SDI
formats only (see “Video Inputs” below). Failover usage when
carrying signals other than SDI should utilize the GPI inputs
controlled by suitable external monitoring devices.
Video Inputs
Number of inputs: 2
Standards:
3G-SDI (SMPTE 425M)
HD-SDI (SMPTE 292M)
SD-SDI (SMPTE 259M)
Impedance: 75
Ω
Receive Performance (EQ/Reclock
active path)
Reclock ON
Reclock OFF
SD
370m
370m
HD
190m
180m
3G
120m
100m
Note: Specification applicable only if using specified
current-manufacture Rear I/O Module.
Video Outputs
Number of outputs:
(1) 75
Ω
BNC latching relay direct from selected input A or B
(4) 75
Ω
BNC non-relay DA (reclockable) via mux from selected
input A or B (213Mbit/s maximum ASI TS bit-rate per port)
Note: Relay output must be terminated into 75
Ω
impedance via
connection to downstream equipment or termination for card
to properly display input status.
GPI
Two independent inputs that select input A or Input B.
Edge-triggering on H/L transition (switch closure or pull-down)
Response:
GPI acknowledge upon falling-edge input triggered
by R
≤
10 k
Ω
(or Vin
≤
2.0 V)
“G” (GND) terminal at chassis-ground potential
Suitable for use with 3.3V LVCMOS logic
Maximum Recommended Logic Control Voltage Range:
0 to 5 VDC
Connector: 3-terminal Phoenix;
GPI-1
/
GPI-2
/
COM
GPO
Two, independent non-referenced (floating) SPST relay closure
indicating input path selected (either via manual or failover
selection).
Response:
Closure effected for duration of true status condition; closure release
upon false status condition
Maximum Recommended Voltage / Current:
12 VDC @ 100mA max.
Connector: 4-terminal Phoenix;
GPO1
/
GPO1C
/
GPO2
/
GPO2C
Table 1-1
Technical Specifications — continued
Item
Characteristic