This equipment is equivalent C/N watcher that has all channels down converter of UHF band, measures equivalent C/N of the received ISDB-T signal, and operates variously.
This measures equivalent C/N of one specified RF channel or IF input, and expresses the operating change of input, equipments and methods numerically from the C/N change. Moreover, this sets the threshold of the result of a measurement, and output an external warning when the range is exceeded. 2 units are built into one main body, and maintenance from the front side is a possible structure.
| Main Body | MC20SR | 1 |
| Unit | MC2000 | Maximum 2 |
External size: 480(W) x 49(H) x 300(D)mm (Excluding protrusions)
| Input | ||
| RF | Number | 1 port |
| Level | -10dBm±6dB or less | |
| Frequency | Specified 1 channel from 470 to 770MHz | |
| Impedance/ connector | 50Ω/BNC type | |
| IF | Number | 1 port |
| Level | -30dBm±6dB or less | |
| Frequency | 37.15MHz | |
| Impedance/ connector | 50Ω/BNC type | |
| Signal processing | ||
| ISDB-T | Transmission mode | Mode2, Mode3 |
| Carrier interval | 0.992kHz, 1.9841kHz | |
| Carrier modulation method | DQPSK, QPSK, 16QAM, 64QAM | |
| Guard interval ratio | 1/4, 1/8, 1/16 | |
| Frequency segment number | 13segment | |
| Hierarchy number | 3 hierarchies or less | |
| Measuring | ||
| BER | ON AIR (Broadcasting) | Measuring the specified hierarchy or the hierarchy with maximum number of allocation segment, after vitavi. |
| Equivalent C/N | Measuring range | The noise is added to the input signal and the amount of the noise that BER becomes 2E-4 is measured. From the amount of the noise, Amount of equivalent C/N deterioration is calculated. |
| TMCC indicate | Indicating contents | Selected hierarchy/ Modulation method/ Convolution code Rate |
| Alarm output1 | ||
| ALARM contact output |
Interface | Non-voltage contact output Contact rating DC24V, 0.1A or less |
| Item | Equivalent C/N deterioration | |
| Outputted, when the values compared with equivalent C/N of IF and RF is falling below the threshold. | ||
| Synchronization abnormal | ||
| Outputted the logical add of Synchronous frame error and TMCC error. | ||
| BER deterioration | ||
| Outputted when BER after vitavi is falling below 2E-4 at the selection of BER measurement. | ||
| Connector | D-sub 9pin (S) | |
|
(1) Equivalent C/N deterioration (2) Synchronization abnormal (3) BER deterioration (4) Common return of 1 to 3 pin (5) N.C. (6) N.C. (7) N.C. (8) N.C. (9) N.C. |
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| Alarm output 2 | ||
| ALARM contact output |
Interface | Non-voltage contact output Contact rating DC24V, 0.1A or less |
| Item | Equivalent C/N deterioration | |
| Outputted, when the values compared with equivalent C/N of IF and RF is falling below the threshold. | ||
| Synchronization abnormal | ||
| Outputted the logical add of Synchronous frame error and TMCC error. | ||
| BER deterioration | ||
| Outputted when BER after vitavi is falling below 2E-4 at the selection of BER measurement. | ||
| Equivalent C/N Measuring value DC output |
Interface | Voltage output(0 to 5V, for 19 to 37dB) IF/RF outputs independently |
| Connector | D-sub 9pin (S) | |
|
(1) Equivalent C/N deterioration (2) Synchronization abnormal (3) BER deterioration (4) Common return of 1 to 3 pin (5) N.C. (6) N.C. (7) N.C. (8) N.C. (9) N.C. (6) RF Equivalent C/N measuring value (7) IF Equivalent C/N measuring value (8) Common return of 6 to 7pin (9) N.C. |
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| General specification | ||
| Power supply voltage | DC48V ± 15% or less | |
| Environmental requirements |
Temperature | -10°C to +45°C |
| Humidity | 45% to 85%RH (Without dew.) | |
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