4170t-ams.ib.rev0.doc
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17/10/2007
IRT Eurocard
AMS-4170T
2 x 2 relay switcher
for SDI, G.703 or analogue video
&
AES, RS422 or stereo audio signals
General Description
The AMS-4170T consists of one “video” and two “balanced audio” switches. Each switch is arranged as a
changeover set with two inputs and two outputs. No terminations are provided on the board allowing the switcher to
be used in a wide variety of applications and with signals of various types and impedances.
The “video” path uses enhanced performance relays to provide switching capabilities for high-speed data signals up
to 270 Mb/s and may be used with analogue video, SDI, MPEG or RF signals. When used with SDI and high-speed
data signals all cable lengths should be kept to a minimum. For best performance the outputs should be connected to
inputs with automatic cable equalisation.
The “audio” path may be used for balanced or unbalanced audio or control signals (RS232, RS422, RS485 etc).
The AMS-4170T is ideally suited to applications where a simple choice between two inputs or outputs is required
and may be easily driven by audio, video or other detector circuits for automatic path selection.
Each switch is equipped with its own transistor driver circuit, which may be bypassed for direct operation of the
relay if desired. Links allow any of the three driver circuits to operate more than one of the sets of relays.
Front panel LED indicators are used to indicate the status of each relay circuit.
Front panel switches allow a choice of local or remote control operation.
An optional SNMP (Simple Network Management Protocol) plug-in module is available for remote monitoring and
control when used in conjunction with IRT’s 4000 series frame fitted with SNMP capability.
The AMS-4170T is designed to fit IRT’s standard Eurocard frames as well as IRT’s 4000 series frame for use with
IRT’s SNMP system and may be used alongside any other of IRT’s analogue or digital Eurocards.
Standard features:
•
One video and two balanced audio changeover switches in one package.
•
Video path suitable for SDI (270 Mb/s), analogue video, MPEG data streams @ 2, 8, 34, 45, 144 Mb/s.
•
Audio path suitable for 2 balanced audio or data signals or 4 unbalanced audio or data signals.
•
Married or independent operation
•
Default path on power fail.
•
Local or remote control.
•
Optional plug in SNMP monitoring and control module.
•
Front panel LED status indicators.
VIDEO A I/P
AMS-4170T FUNCTIONAL BLOCK DIAGRAM
VIDEO B I/P
VIDEO A O/P
VIDEO B O/P
AUDIO B (L) O/P
AUDIO A (L) O/P
AUDIO B (L) I/P
AUDIO A (L) I/P
AUDIO B (R) O/P
AUDIO A (R) O/P
AUDIO B (R) I/P
AUDIO A (R) I/P
SNMP
