repeater与CTCSS关系.ppt

Emergency Measures Radio Group (EMRG) - Ottawa ARES EMERGENCY MEASURES RADIO GROUP OTTAWA ARES Two Names - One Group - One Purpose EMRG-403 Training Course Cross Band Repeaters Date Of Last Change: 2009-11-04 Version: 1.1 Emergency Measures Radio Group (EMRG) - Ottawa ARES * Course Number: EMRG-403 Course Name: Using Cross Band Repeaters Instructor Led: Optional Prerequisites: None What You Should Learn From This Course: From this course you should understand the benefits, limitations and proper methods to set up and use a cross band repeater Recommended Reading: EMRG-409 Intro To CTCSS Read your radio manual if your radio has cross band repeat capability. Course Introduction What Is AnIn Band Repeater Transmit Receive are in the same band. This is a typical Amateur VHF or UHF repeater used every day. Requires a Duplexer to separate Receive and Transmit signals, or separate antennas several hundred feet apart Emergency Measures Radio Group (EMRG) - Ottawa ARES * DUPLEXER Adds or separates signals from the same band, where the signals are close enough together in frequency, that the attached equipment is not able to reject the unwanted signal. Emergency Measures Radio Group (EMRG) - Ottawa ARES * Tunable to Pass the desired frequency and Reject the undesired frequency Used for repeaters and full duplex base stations What Is ACross Band Repeater Transmit Receive are in different bands, typically VHF and UHF Supports uni-directional or bi-directional repeating Several configurations; fixed site used to link neighbouring systems mobile permanently installed in a vehicle movable, made from mobile or portable radios. Can use separate antennas for each band, or a Diplexer and dual band antenna Emergency Measures Radio Group (EMRG) - Ottawa ARES * DIPLEXER Adds or separates signals from different bands, where the signals are far enough apart in frequency, that the attached equipment is able to reject any unwanted signal without impacting the desired frequenc