EN
PL
CZ
DE
IE
HU
PT
RO
SK
Support
Details
View of the transmitter
Rear view
The included accessories
Optical Transmitter MOS-211B R81720B is dedicated for cooperation with the TERRA MMH-3000 headend. It converts electrical signals from the headend applied to RF IN into optical signal. The device cooperates with ROS-121M R81721 optical receiver and OD-xxx optical nodes.
Distinguishing features
- compact DFB cooled laser transmitter
- automatic thermo-cooler control for constant laser temperature
- input signal level measurement
- user-selectable automatic/manual RF level control
- AGC circuit for constant laser power
- selectable output power levels
Optical transmitter MOS-211B R81720B is a transmodulator (converter) of RF electrical signals into optical signal of 8 dBm level. It cooperates with single-mode optical fibers operating in 1310 nm window.
The device has been equipped with keypad and LCD display. The first information is current firmware version and device status. With reverse channel, it is possible to obtain information on remote optical node.
Optical links are indispensable when the SMATV/cable TV network is quite extensive (the distance between the headend and distributing network exceeds 300 m).
NOTICE
- The transmitter can be switched on only when the whole link has been carefully installed.
- It is not allowed to directly connect the optical transmitter and receiver. For testing one/both of the devices one needs to employ appropriate attenuator.
Specifications
| Name | Optical transmitter MOS-211B |
| Code | R81720B |
| Optical power | 8 dBm |
| Laser type | DFB |
| Modulation | direct |
| Optical wave length | 1310+/-10 nm |
| RF frequency range | 47-862 MHz |
| Pass-band ripple | +/-0.75 dB |
| RF input level | 75...90 dBuV |
| Relative intensity noise (RIN) | <-155 dB/Hz |
| CNR | >=51 dB |
| CTB | >=65 dBuV |
| CSO | >=60 dBuV |
| Gain adjustment | 15 dB with 0.5 dB step |
| Slope adjustment | 10 dB with 0.5 dB step |
| Optical connector | SC/APC |
| Power | 230 V / 50 Hz 17 W |
| Dimensions / Weight | 485x58.5x171 mm / 3.9 kg |
Available models (to order)
| Name | MOS-211A | MOS-211B | MOS-211C | MOS-211D | MOS-211E | MOS-211F |
| Optical power [dBm] | 6 | 8 | 10 | 12 | 13 | 14 |
Optical transmitter MOS211B can also be controlled via TerraLink software. Because this program is dedicated for maximum two UC-380 sub-racks, there is possibility of addressing the transmitter as one of the modules, on the condition that one slot in a sub-rack remains empty.
Specifications
| Nazwa urządzenia | Transmiter optyczny MOS-211B |
| Kod | R81720B |
| Poziom wyjściowy lasera | 8 dBm |
| Typ lasera | DFB |
| Typ modulacji | direct |
| Okno pracy | 1310+/-10 nm |
| Zakres częstotliwości | 47-862 MHz |
| Płaskość | +/-0.75 dB |
| Poziom wejściowy RF | 75...90 dBuV |
| Względna niestabilność lasera | <-155 dB/Hz |
| CNR | >=51 dB |
| CTB | >=65 dBuV |
| CSO | >=60 dBuV |
| Wejściowa regulacja tłumienia | 15 dB with 0.5 dB step |
| Wejściowe wyrównywanie poziomu | 10 dB with 0.5 dB step |
| Złącze optyczne | SC/APC |
| Pobór energii | 230 V / 50 Hz 17 W |
| Wymiary / Masa | 485x58.5x171 mm / 3.9 kg |