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MCPA Relay Stations
Outline view
50W MCPA relay station system
System diagram
| OFDM Modulator | Transmission Conv. | Basic SW Cont. | 4 Waves Combiner | 2 Waves Distributer | 50W MCPA | MCPA SW Cont. | Output Filter | |
| OFDM Modulator | 50W MCPA | |||||||
| MCPA Power Meter | ||||||||
| Rb Oscillator | Rb Oscillator |
BM2040D/22: 50W MCPA relay station system
Signal diagram of TS-TTL relay system using dual MCPA method
(When each box is clicked, it links with a corresponding product specification.)
Specification
Outline
- It is MCPA relay station system which re-modulates each of two or more TTL-transmitted TS signal, amplifies the multi-channel signals together and sends.
Outline of operation
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Basic part
- It supplies each output of TS, CLK, and F_SYNC of the TS-TTL device to the OFDM modulator.
- It converts the IF signal of the modulator output (Fc = 37.15MHz) into the RF signal with the transmission conversion.
- It selects the operation line or the preliminary line and outputs it with basic part control switcher.
- It mixes the RF output signal of each basis part switcher with the combiner.
- It switches10MHz standard signal in the seamless with the switcher that controls the phase and the amplitude.
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MCPA power amplification part
- It distributes the RF signal mixed with the combiner.
- It amplifies with MCPA.
- It selects the operation line or the preliminary line and outputs it with PA switcher. (High-speed switching of 10msec or less)
- MCPA adopts the feed forward distortion compensation method.
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Basic part
Control and monitor
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- Control
Switch of system on operation side/standby side
(The starting up operation test on the standby side power amplifier is also possible.)- Auto / Remote
- Manual
- Monitor
-
Alarm state:
It depends on the display of the alarm of the control system equipment, the alarm panel, and each unit. -
Signal operation:
It confirms the transmitting power, the output power of PA, the voltage, and the current using the check meter of meter panel.
Moreover, it can confirm the level with the monitor connector of each unit. -
Power supply system operation state:
It can confirm the input-voltage and the output-voltage of the power supply with the monitor terminal and the terminal stand of the MCCB panel.
-
Alarm state:
- Control
General specification
- It depends on "Transmission equipment common specifications for the Digital terrestrial Broadcasting" (Orange Book).
Composition equipment list
| Classification | Name of articles | Pet name |
| Excitation | OFDM Modulator(H=50mm) | MD2137 |
| Transmission conversion part without SAW filter | TC20U1 | |
| Local oscillator unit | ||
| CH BPF | [6840CD] | |
| Main body of transmission conversion | TX20SR | |
| Basic part control switcher Type I (less than 10msec) | SW2TR0 | |
| Power amplification | 4 adjacent channel wave combiner | FO2MF4 |
| PA input distributor | FD2M21 | |
| 50W MCPA | PA2M47 | |
| MCPA control switcher Type I | SW2PR1 | |
| Wideband output filter | FO2W00 | |
| Oscillator | Rb oscillator | RB20S0 |
| Power meter | Multi channel power meter (for 4 wave. without 7segment display.) | PM2M2A |
| Meter panel | MP2PA3 | |
| Power supply | DC48V 50A Power supply unit | PU2050 |
| Shelf for Power supply unit | PS2050 | |
| Arrester panel | TP20Z0 | |
| AC MCCB | CB20A1 | |
| DC MCCB | CB24B0 | |
| Rack Cabinet | Rack Cabinet 570(W)×2200(H)×710(D) | |
| Plaques | Main plaque | |
| Monitor | TV | |
| Dummy loading | ||
| Blank panel etc. | Chassis (H=200mm) | |
| Chassis (H=450mm) | ||
| Ventilation panel(50mm) | ||
| Blank panel (50mm) | ||
| Blank panel (150mm) |
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