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Switchers
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General
The RL-740 relay card is designed to
interface with the IRT Eurocard
VG-737
video and
AG-738 audio program fail modules.
Front panel LED indicators are used to
indicate the status of each relay circuit.
The RL-740 utility relay card is designed to
provide two isolated contact sets and
contains 5 DPST relays which can be
controlled individually, both the make and
break contacts are available either directly
or by on board link selection.
One of the contact sets can also have the
relay common contacts bussed to facilitate
connection to the input circuit of the IRT
5x1 video and audio switchers.
When the relay is NOT ENERGISED relay 1
circuit switches input 1 to the output
thus providing a secure path when power
is not present on the module.
The relays used are bifurcated contact
low energising current relays designed
for long life and high reliability.
Note: For relay switching of video, data
and HF, see the
AVS-3170
relay switcher.
See also other 3000 series switching
products.
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data sheet
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AVS-3170 Video,
Data & IF 5 x 1 Relay Switcher
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Suitable for video, SDI,
ASI, RF, ACS or high speed digital
signals.
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May be used for G.703 MPEG transport
streams.
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Economical switcher for 2, 8, 34 & 45 Mb/s
data signals.
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Termination impedance may be easily changed
from 75Ω to 50Ω or open circuit.
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Default path from source 1 on power fail.
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Compatible with 3000 series switchers or
wire per crosspoint control.
General
The AVS-3170 5
x 1 relay switcher for video and RF is a passive
unbalanced circuit relay switcher.
The relays used are low capacitance reed relays
wired to minimise crosstalk from the unused
inputs and thus allow the switcher to be used
with RF or video signals exceeding 140 MHz.
This also allows the switcher to be used for
highspeed digital signals with minimal effect on
the pulse risetime.
When used at very high data rates the small
amount of high frequency attenuation may be
corrected by following the switcher with a data
distribution amplifier. This not only provides
automatic equalisation, but also source
isolation and multiple outputs.
Termination resistors for 75Ω signals are fitted
as standard. These may be easily changed to 50Ω
for RF signals or removed for switching TTL or
other signals.
When the
switcher is not powered, relay 1 circuit
switches input 1 to the output thus providing a
secure path during power failures.
The AVS-3170 5 x 1 relay switcher is designed to
interface with other IRT Eurocard 3000 series
switchers or with the VG-737 video and
AG-738 audio program fail detectors.
The switcher may be fitted with a local control
panel, type CPS-3050, or with a tally panel,
type
TPS-3010, for local path indication when the
switcher is operated remotely.
The AVS-3170 is built to the IRT Eurocard format
and may be mounted in any of IRT's standard
Eurocard frames together with other Eurocard
modules.
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AMS-4171 Relay Video &
Audio Switch
Applications:
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One video and two
balanced audio changeover switches in
one package
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Video path suitable for
HDSDI (1.485Gb/s), SDI (270 Mb/s),
analogue video, ASI data streams and
G.703 @ 2, 8, 34, 45, 144, 155 Mb/s
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Audio path suitable for 2
balanced, or 4 unbalanced, audio or data
signals
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Married or independent
operation
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Default path on power
fail
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Local or remote control
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Optional plug-in SNMP
monitoring and control module
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Front panel LED status
indicators
The AMS-4171
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 1.485 Gb/s and may
be used with analogue video, SDI, HDSDI, ASI or
G.703 data signals.
The "audio" path may be used for balanced or
unbalanced audio or control signals (RS232,
RS422, RS485 etc).
The AMS-4171 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
Front panel
switches allow a choice of local or remote
control operation.
Front panel LED indicators are used to indicate
the status of each relay circuit.
Remote control is via a switch to ground
connection, where video and audio may be
operated independently or with audio following
video by means of link settings.
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-4171 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.
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AMS-4370HD HD,
G.703, ASI, SDI, Video 4 Port Changeover Relay
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Signal path suitable for
HD (1.4Gb/s), SDI , analogue
video, ASI data streams and G703 signals
@ 2, 8, 34, 45,
144 Mb/s.
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Momentary Set/Reset or
HI/LO logic control.
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No path change on power
fail.
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Local or remote control.
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Front panel LED status
indicators
General
The AMS-4370HD is a magnetic latching 4 port
changeover switcher using enhanced performance
relays which provide switching capabilities for
high speed data signals up to 1.4 Gb/s. It is
suitable for switching high definition video,
ASI, SDI or G.703 data streams or analogue video
signals, provided that they have characteristic
impedances of 75Ω.
The AMS-4370HD is arranged as a changeover
switch 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 magnetic latching characteristic of the high
performance relay allows momentary control and
also provides for no change of path during power
loss. Remote changeoverchangeover is by a
momentary ground connection.The AMS-4370HD is
ideally suited to applications where a simple
choice between two inputs or outputs is required
and may be easily driven by detector circuits
for automatic path selection.
For best performance the outputs should be
connected to inputs with automatic cable
equalisation.
Remote indication of tally and local/remote
status is provided for integration into central
alarm and monitoring systems.
The AMS-4370HD relay card is built to the
Eurocard format and will mount in an IRT 1RU or
4000 series 3RU frame.
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