1. Automatic UpLink Power Control System

2. UpLink Power Controller (principle of operation) ‘Rain Fade’ affects both transmitted signal and Beacon signal by a similar amount. Product Focus; Automatic UpLink Power Control (AUPC)

3. 3 UpLink Power Controller (principle of operation) L-Band signal Processing (Level Detection, Comparator & Limiter) UpLink Chain (from Modulator) Beacon Signal Detection LNB SHF signal BUC L-Band signal (or IF 70/140MHz if UpConverter fitted). Bypass option fixed attenuator UPC7001UpLink Channel Compensation Shows DC & 10MHz pass to BUC option.

4. 4 UpLink Power Controller (internal attenuation) Easy to use, cost effective solution to rain fade compensation. Internal or external Beacon Receiver. Fail safe by-pass option. DC & 10MHz ‘pass’ option. Beacon Receiver Signal (L-Band/ SHF) Processing (Level Detection, Comparator & Limiter) UpLink Chains Beacon Signal Detection

5. UpLink Power Controller (external attenuation) Beacon Receiver Signal (L-Band/ SHF) Beacon Signal Detection UpLink Chains CAN-bus Connection Directly interfaces to Peak equipment in the UpLink chains via CANbus to provide a simple, cost effective solution to rain fade variations, without the need for additional RF cabling. Full RS232/485 remote control. Ethernet options supporting SNMP,Embedded Web-server etc. Processing (Level Detection, Comparator & Limiter) 5

6. UpLink Power Controller (physical attributes) 6 Up to 4 ‘fixed’ Channels in 1RU, plus modular 10-Channel expansion system in 2RU.

7. UpLink Power Controller (anti-scintillation) 7 Traditional rain- fade rates of change in minutes Scintillation rates of change in <1s Relative rate of change in dB -10 10

8. Earth Station RF Equipment from Peak Communications Ltd. www.peakcom.co.uk www.peakcom.co.uk