![]() ![]() ![]() ![]() |
MMM-4682 & MMX-4682:
4 ASI to G.703 (STM-1) Combiner / DeCombiner. | ||
FEATURES:
|
||
GENERAL:
|
||
The MMM-4682 and MMX-4682 are part of a family of data transcoders for converting between the commonly used MPEG2
Transport Stream formats for video distribution in the broadcast industry. | ||
TECHNICAL SPECIFICATIONS:
|
||
MMM-4682: |
|
Inputs: |
|
Type 1 |
4 x ASI-C 75 Ω, 800 mVp-p, BNC connector. |
Maximum Data Rate per channel |
Up to a combined maximum rate of 148 Mb/s. |
Equalisation |
Automatic, better than 200m at 270Mb/s for Belden 8281 or equivalent cable. |
Type 2 |
RS232 Uni directional data input. |
Outputs: |
|
Type 1 |
2 x 1Vp-p, G.703, 75Ω BNC connector. |
Electrical Characteristics |
CMI (STM-1e) or NRZ (STM-1o)1 encoded, selectable. |
Type 2 |
1 x optical, G.703, SC/PC connector (standard). |
Optical Characteristics |
NRZ (STM-1o) encoded. |
Data Rate |
155.52 Mb/s. |
Alarm Outputs: |
|
Major |
Open circuit on sum of ASI input payload rates in excess of maximum allowable 148Mb/s, or loss of power. |
Minor |
Open circuit on no valid input ASI streams present, or loss of power. |
MMX-4682: |
|
Inputs: |
|
Type 1 |
1 x G.703, 75 Ω BNC connector. |
Electrical Characteristics |
CMI (STM-1e) or NRZ (STM-1o)1 encoded, selectable. |
Equalisation |
Automatic, better than 200m at 155Mb/s for Belden 8281 or equivalent cable. |
Type 2 |
1 x optical, G.703, SC/PC connector (standard). |
Optical Characteristics |
NRZ (STM-1o) encoded. |
Data Rate |
155.52 Mb/s. |
Outputs: |
|
Type 1 |
4 x ASI-C 75 Ω, 800 mVp-p, BNC connector. |
Data Rate |
Same as MMM-4682 input rate. |
Type 2 |
RS232 Uni directional data output. |
Alarm Outputs: |
|
Major |
Open circuit on no valid STM-1 input present, AIS on STM-1 input detected, or loss of power. |
Minor |
Open circuit on no valid output ASI streams present, or loss of power. |
Optical: |
|
Optical path loss |
3 to 18 dB with PIN detector (typ. 20dB). NOTE: requires optical attenuator for path losses < 3dB. |
Optical fibre |
Designed for use with 9/125 µm single mode fibre. |
Optical wavelength |
1310nm (DFB laser - standard). |
Optical connectors |
SC/PC (standard). |
MMM-4682 optical output |
0 dBm +4.5/-0 dB standard DFB laser. |
MMX-4682 optical input |
PIN detector, -3 to -18 dBm input level. |
Power Requirements: |
|
Voltage |
28 Vac CT (14-0-14) or ±16 Vdc. |
Power consumption |
6 VA. |
Other: |
|
Temperature range |
0 - 50°C ambient. |
Mechanical |
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. |
Ordering Information |
MMM-4682/PC & MMX-4682/PC for standard SC/PC optical connector (suffix /APC for SC/APC); |
MMM-4682 & MMX-4682 for electrical only (non-optical) version. |
|
NOTE: 1 |
CMI encoding standard for STM-1 electrical. |
NRZ encoding on electrical O/Ps and I/P for use with external
optical transmitters and receivers (for backwards compatibility with previous models). |
![]() ![]() ![]() ![]() |
Due to our policy of continuing development, these specifications are subject to change without notice.
|