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ACU(Automatic Control Unit) is equipment for maintaining broadcasting service by controlling error occurrence by observing and analyzing the status of digital broadcasting system.
Outdoor-type broadcasting relay system is composed of 2 sets of Exciter for falsification and demodulation and HPA(High Power Amplifier), which is dualized structure and BPF(Band Pass Filter) etc. output line is only composed of 1set. ACU reports to control department after taking suitable action to service for normal status by checking the input, output and condition of each set.
ACU Ʈ Ǵ ° ¸ ȸϿ ̻ Ʈ Ǻϰ ġ ̻ ó ̸ մϴ. , ü ܺο LCD г Ű ġϿ ڿ Ǽ մϴ.
- Operation Mode
- Local - Manual/Auto
- Remote - Manual/Auto
- Control Function
- TX ON & OFF
- Fault reset
- Auto change-over (Active Standby)
- TX-A/B antenna selection
- Monitoring and Display Function (Indication)
- Receiving status (Normal/Abnormal) indication
- Total fault
- TX alarm
- TX ON & OFF indication
- Auto/Manual, Local/Remote
- TX PS NORMAL
- Auto change-over LED
- TX-A/B antenna use
- Alarm Function
- Total fault
- Exciter A/B fault
- TR PA fault
- TX output reflect fault
- TR PA temperature fault
- TX output low(80%) / high(120%) fault
- PA power supply fault
- TX Quality Monitoring Function
- Output power/reflect power (uncertainty : 4% or less)
- Transmission SNR
| Item | Specifications | Remarks |
|---|---|---|
| LCD Panel and Key Function | LCD | Front arrangement |
| Signal Diagram | KEY+LED | Front arrangement |
| Fault LED | TOTAL, EXC-A, EXC-B, PA, P/S, VSWR | Front arrangement |
| Exciter #1,#2 and Interface | RS-232C (D-SUB 9Pin) | Placed within Equipment |
| HPA #1,#2 Interface | RS-232C (D-SUB 9Pin) | Placed within Equipment |
| Switch Module Interface | RS-232C (D-SUB 9Pin) | Placed within Equipment |
| PSU #1, #2 Interface | RS-232C (D-SUB 9Pin) | Placed within Equipment |
| Power Monitor Interface | RS-232C (D-SUB 9Pin) | Placed within Equipment |
| Communication with Upper Controller | CDMA-MODEM (D-Sub 9Pin) | Placed within Equipment |
