ADC-3250 & DAC-3250:   Analogue Video & Audio Network Interface Adapter

                                               and Fibre Optic Link.

FEATURES:

      1 analogue video, 4 audio and 1 data channel to a 270 Mb/s digital stream suitable for            transmission over 270 Mb/s systems, such as digital fibre systems, routers, etc.
      Plug-in Fibre Optic Link boards included.

Brochure  

User Manual  

GENERAL:

The ADC-3250/OPT and DAC-3250/OPT form an encoder / decoder pair for converting an analogue video, up to 4 channels of audio and an RS-232 data port to a 270 Mb/s digital signal suitable for transport over ASI/SDI paths.

This allows analogue signals to be passed through purely digital environments such as digital optical links and digital routers and switchers thus simplifying installations that are predominantly digital where some analogue signals still exist.

When used with IRT's fibre mux/demux system, both analogue and digital signals can be sent over the same link.

The ADC-3250/OPT encodes the analogue input signals to a 270 Mb/s digital stream. The inputs can either be a single video, up to 4 channels of audio or a combination of video and audio. There is also an RS 232 data input port, which can be used concurrently with the video and audio or by itself.

The DAC-3250/OPT decodes the 270 Mb/s digital stream to recover the original signals.

Front panel LED indicators on both units indicate the presence of the analogue and data input signals. The ADC-3250/OPT allows cable equalisation of various lengths by a front panel control. A front panel monitor output aids in setting this correctly.

Plug-in fibre optic boards are included on both the ADC-3250/OPT and DAC-3250/OPT for direct connection to a single mode fibre.

The 270 Mb/s digital signal is of the same data rate as ASI and SDI signals hence its ability to be sent over ASI/SDI paths. Although similar in structure to both ASI and SDI it is neither of these types of signals. Hence the ADC-3250/OPT and DAC 3250/OPT are designed to act as an encoder / decoder pair.

Both the ADC-3250/OPT and DAC 3250/OPT are manufactured on extended Eurocard boards and are suitable for mounting in IRT's 1RU and 3RU Eurocard frames with other analogue or digital modules.


TECHNICAL SPECIFICATIONS:

ADC-3250/OPT:
Inputs:
Type 1
1 x Analogue video, 75 Ω BNC terminated.
Type 2
4 x Hi-Z Analogue audio, balanced 3 pin.
Type 3
1 x RS-232 data (up to 115200 Baud).
Video Equalisation
Up to 300 metres, adjustable from front panel.

Outputs:
Type 1
1 x 270 Mb/s fibre optic digital, SC/PC.
Type 2
1 x 270 Mb/s digital, 75 Ω BNC.

DAC-3250/OPT:
Inputs:
Type 1
1 x 270 Mb/s fibre optic digital, SC/PC.
Type 2
1 x 270 Mb/s digital, 75 Ω BNC.
Equalisation
Automatic, up to 300 metres for Belden 8281 or equivalent cable.

Outputs:
Type 1
1 x Analogue video, 75 Ω BNC terminated.
Type 2
4 x Hi-Z Analogue audio, balanced 3 pin.
Type 3
1 x RS-232 data.

Optical:
Optical path loss
 31 dB maximum.
Optical fibre
Designed for use with 9/125 µm single mode fibre.
Optical wavelength
1310nm ± 30nm.
Optical connector
 SC/PC.

Power Requirements:
Voltage
28 Vac CT (14-0-14) or ±16 Vdc.
Power consumption
ADC-3250/OPT < 6.5 VA, DAC-3250/OPT < 11VA.

Other:
Temperature range
0 - 50°C ambient.
Mechanical
Suitable for mounting in IRT 19" rack chassis with input, output and power connections on the rear panel.
Finish:             Front panel
Grey background, black lettering & red IRT logo.
                       Rear assembly
Detachable silk-screened PCB with direct mount connectors to Eurocard and external signals.
Dimensions
6 HP x 3 U x 220 mm IRT Eurocard.



                 



Due to our policy of continuing development, these specifications are subject to change without notice.