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

370m

190m

180m

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