|
Analogue
A/V Products
·
Analogue Audio
· Analogue
Video
· Fibre
Optic Link
· Switchers
· Switcher
Control
Digital A/V
Products
·
Digital Audio
·
Digital Video
· Fibre
Optic Link
· Switchers
|
DIGITAL A/V PRODUCTS
Digital Audio
ACC-3390
Analogue Stereo to AES/EBU Converter
DAC-4411
AES/EBU
to Analogue Audio Converter
DAI-3206
270Mb/s SDI Digital &
Analogue Audio Inserter
DAX-3206
270Mb/s
SDI Digital & Analogue Audio Extractor
DAC-3440/DAC-3450
AES to G.703 (E1) Network
Interface Adapter
DAA-4400
8 O/P
AES/EBU DA
AAC-3390
AES/EBU
A to D Converter
Features
-
Balanced stereo inputs.
- High impedance or
600 Ohm input termination.
- AES external
reference input.
- Balanced 110 Ohm
or unbalanced 75 Ohm
AES output rear assembly options.
- Front panel AES
monitoring point
General
The IRT AAC-3390 is an
analogue audio to AES/EBU digital audio signal converter, and converts
standard stereo analogue audio signals to the AES3-1992 and SMPTE-276
AES digital audio standard.
The input signals are a stereo pair of balanced audio at the standard +4
dBu line up level.
The outputs are three serial digital audio signals; one unbalanced BNC
connection on the front panel for monitoring and two from the rear panel
assembly. The latter can be 110 Ohms balanced using the ZAC- 3391 rear
panel assembly or 75 Ohms unbalanced BNC connections using the ZAC-3390
rear panel assembly.
A further input is provided for a reference AES input signal to lock the
signal from the AAC-3390 to a station reference.
The reference input can be either 110 Ohms
terminating balanced line or 75 Ohms terminating unbalanced line. Both
connections are provided on the rear panel assembly. Selection of the
input type is by links on the AAC-3390 main circuit board.
Front panel LED indicators are provided
for DC voltage, presence of input audio levels above -30 dBu, lock to
external AES reference and overflow at 0 dBFS corresponding to the
+24dBu full scale input audio level.
The AAC-3390 is designed to fit the IRT range of Eurocard mounting
frames, including the 12 or 10 slot 3 RU and 2 slot 1 RU rack mounting
frames.
 Click
here to view data sheet
TOP
|
DAC-4411 AES/EBU DA With Analogue Monitoring
Features
-
4 AES and 2 analogue stereo outputs.
- 24 bit digital to
analogue processing.
- 75 and 110 Ohm
inputs.
- Choice of 75 or 110
Ohm AES outputs by changing rear connector assembly.
- Front panel digital
monitoring output.
- Front panel audio
level and AES error indications.
- All inputs and
outputs transformer coupled.
- Digital circuit
re-shapes output and restores level.
- No cable
compensation adjustments required.
- Optional plug-in
SNMP monitoring module
|
General
The DAC-4411 is designed to
provide AES/EBU digital audio conversion to analogue stereo
format. Two AES outputs are provided for through signal and
monitoring purposes.
The DAC-4411 may be used with AES digital signals at 48 kHz.
The digital circuitry of the DAC-4411 restores the signal
rise and fall times and output level without the need to
manually adjust gain and compensation controls.
The digital converter monitors the AES signal for errors,
and lights an alarm indication on the front panel.
LEDs are also provided to indicate the analogue output
level. These are user adjustable, but factory set to a -40
dBFS threshold.
Link settings allow the
analogue output to be muted on loss of digital input.
Individual rear assemblies are
available for 75 Ohm or 110 Ohm use. No changes are required
to the main DA to convert between the two output types.
Additional rear assemblies of
either type may be ordered separately. Both types include
both 110 and 75 Ohm input connectors and balanced analogue
stereo output connectors. The required input is selected by
links on the main PCB.
The DAC-4411 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.
Click
here to view data sheet
TOP |
|
DAI-3206
270 Mb/s SDI Digital & Analogue Audio Inserter
Features
-
Standard 75 Ω 270 Mbit/s SDI input
- Inserts audio – either 2 AES
signals containing 2 channels each, 4 analogue channels or a combination
of AES and analogue pairs
- 110 Ω (standard) or 75 Ω AES
inputs
- Selectable re-sampled or non
re-sampled modes
- Supports SMPTE 272M-A
synchronous 48 kHz insertion
(resampled mode)
- Supports SMPTE 272M-AD
asynchronous 48 kHz insertion (non resampled mode)
- 20 bit audio supported
- Z, C, U data preserved
- Automatic EDH correction
and/or insertion
- Ability to replace existing
embedded audio
- Supports 525 & 625 line
formats
- Indicators / external alarms
for loss of carrier & audio
- Automatic SDI input cable
equaliser to 250 m
- Two 270 Mb/s SDI outputs for
connection to additional units
General
The DAI-3206 is a high performance audio
embedder for 270 Mbit SDI video signals. It supersedes the earlier DAI-3200
audio embedder.
Existing embedded data packets may be optionally removed and/or replaced via
link settings on the PCB.
Each DAI-3206 is capable of inserting one audio group (2 AES signals, 4 analogue
channels or combination of AES and analogue pair channels) into an existing SDI
video stream. Group position selection is made by the front panel local control.
Note that when inserting 2 AES streams, both channels must be frequency locked
to each other. Analogue audio is automatically locked to the other AES signal,
if present, or else to the SDI video input.
The DAI-3206 supports AES/EBU synchronous/
asynchronous 48 kHz, 20-bit audio data packets.
An audio presence indicator is provided for each input. If one AES or analogue
audio pair is missing then those particular channels are set to zero. If both
AES and/or analogue audio pairs are missing (dependent on mode selected), then
no packets are inserted.
The DAI-3206 complements the DAX-3206 audio extractor.
The DAI-3206 is fabricated in IRT's standard Eurocard format and may be housed
in a variety of IRT Eurocard frames alongside other standard modules.
Click
here to view data sheet
TOP
|
DAX-3206 270 Mb/s SDI Digital Audio Extractor
Features
-
Standard 75 Ω 270 Mbit/s
video input
-
Standard 75 Ω 270 Mbit/s
video output
-
Extracts embedded audio
(Supports 48 kHz Synchronous and Asynchronous level
A & D audio packet decoding)
-
Supports 525 & 625 line
standards
-
Indicators / external
alarms for loss of carrier & audio
-
Automatic input
equaliser to 250 m
-
Four high quality
analogue audio outputs
-
Two 110 Ω balanced or 75
Ω unbalanced AES outputs
-
IRT Eurocard format
General
The DAX-3206 is a high performance embedded audio
extractor for 270 Mbit SDI video signals. It is
primarily designed to operate with IRT's DAI-3206
digital audio inserter but will work on any embedded SDI
source.
A typical SDI signal may contain up to eight audio pairs
arranged in four groups. Each DAX-3206 is capable of
extracting one audio group (2 AES / 4 analogue) from
those available. Selection is made via a front panel
local control switch.
The DAX-3206 supports AES/EBU synchronous and
asynchronous audio at 48kHz, 20-bit audio data packets.
Both analogue and digital audio outputs are provided so
that the one module may be used for all applications in
monitoring and processing.
The use of digital audio filtering and 20-bit digital to
analogue converters produce studio quality analogue
audio and the AES/EBU digital interface allows digital
interconnection in either balanced or unbalanced
formats.
An audio presence
indicator is provided for each group output. If no audio
is detected the corresponding output is muted.
The DAX-3206 complements the DVC-4112 SDI to analogue
video converter for full conversion of SDI signals to
analogue video and audio.
The DAX-3206 comes configured standard with 110 Ω
balanced AES/EBU outputs. 75 Ω unbalanced outputs are
available by insertion of links on the rear assembly.
The DAX-3206 is fabricated in IRT's standard Eurocard
format and may be housed in a variety of IRT Eurocard
frames alongside other standard modules.
Click
here to view data sheet
TOP
|
|
DAC-3440 & 3450 AES/EBU / G.703 (2 Mb/s)
Network Interface Adapter
-
Conversion of AES/EBU audio to 2Mb/s G.703
for transport via telecom circuits.
- Choice of 75Ω
unbalanced or 110Ω balanced AES/EBU line connections.
- 48 kHz 20 bit
default sample rate, 25 – 55 kHz rates supported.
- Optional
external AES/EBU reference input for rates other than 48
kHz.
- Allows Channel
(C) or User (U) data to be conveyed.
- IRT Eurocard
format
General
The DAC-3440,
together with the DAC 3450, forms a transmitter/receiver system,
which is designed to allow an AES/EBU digital audio signal to be
distributed via the phone network.
The DAC-3440 converts an AES/EBU digital audio signal into a
non-framed G.703 compatible signal.
The DAC-3440 combines the 20 bit audio data with either C data or U
data into an output stream at 2.048 Mb/s. This stream is then output
as a standard G.703 HDB3 encoded 75Ω unframed signal.
The DAC-3450 converts a G.703 signal, whose content is formatted as
per the output of the DAC- 3440, to an AES/EBU data stream. The
receiver obtains synchronism with the incoming stream and then
separates the audio data from the combined C (or U) data.
The DAC-3450 allows a local reference AES/EBU signal to be input for
rate synchronization of the output. With no reference signal
present, output rate is automatically set to 48 kHz
The system can
handle mono or stereo 20 bit AES/EBU audio at any rate from 25 KHz
to 55 kHz, although it is designed for a nominal 48 kHz.
The system also allows either the Channel (C) or User (U) data to be
conveyed.
Front panel LEDs indicate when an AES/EBU signal is present and when
the input AES/EBU signal sample rate is 48 kHz on the DAC-3440, and
when a valid 2.048 Mb/s G.703 input signal is present and when a
valid AES/EBU reference signal is applied to the DAC-3450.
A relay output is provided on each of the rear assemblies for remote
status indication for when a valid AES/EBU signal is present or
invalid.
The DAC-3440 is fabricated in IRT's standard Eurocard format and may
be housed in a variety of IRT Eurocard frames alongside other
standard modules.
|
DAA-4400 AES/EBU
Distribution Amplifier
Features
-
8 outputs.
-
75 and 110 Ohm inputs.
-
Choice of 75 or 110 Ohm
outputs by changing rear
connector assembly.
-
Front panel monitoring
output.
-
Optional plug-in SNMP
monitoring module.
-
All inputs and outputs
transformer coupled.
-
Digital circuit re-shapes
output and restores level.
-
No cable compensation
adjustments required.
General
The
DAA-4400 is designed to provide a solution
to most AES/EBU digital audio signal
distribution requirements.
The DAA-4400 supersedes the DAA-3400 and
provides all of its predecessor's functions
together with the added option of a plug-in
Simple Network Management Protocol (SNMP)
monitoring module for use with IRT's 4000
series SNMP system frame.
The DAA-4400 will operate at any frequency
from 34 to 54 kHz and may be used with
non-AES digital signals that have a net zero
DC content.
Whilst analogue VDA's may be used for 75 Ohm
AES signals, the digital circuitry of the
DAA-4400 offers the advantage of restoring
the signal rise and fall times and output
level without the need to manually adjust
gain and compensation controls.
Individual
rear assemblies are available for 75 Ohm or
110 Ohm use. No changes are required to the
main DA to convert between the two output
types.
Additional rear assemblies of either type
may be ordered separately. Both types
include both 110 and 75 Ohm input
connectors. The required input is selected
by links on the main PCB.
The DAA-4400 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.
Click
here to view data sheet
TOP
|
