IARU Region 1 Technical Recommendation B.1.

DÜSSELDORF 1989, Tel Aviv 1996

Page 1 of 1

GUIDELINES FOR THE CONSTRUCTION OF

BEACONS ON THE VHF/UHF/MICROWAVE AMATEUR BANDS

            
Band----> 50 MHz 145 MHz 435 MHz 1.3 GHz higher

bands
Aerial general purpose : omnidirectional

special purpose : directional

        
Transmitting period 24 hours per day        
Keying Mode F1A/A1A

(A1 preferred)

 F1A / A1A      
Carrier nominal frequency un-shifted        
Carrier transm.period 40 seconds        
Keying direction ( F1A) From shift position to nominal frequency1        
Carriershift (F1A) Fnom minus 250 Hz Nominal frequency minus 400 Hz      
Keying text Call, Locator, etc.        
Transm.period text Maximum 20 seconds        
Cyclus period = carrier period + text period 30 seconds        
Repetition frequency text 1 time/cycle        
Data transmission not yet considered        
Frequency tolerance ±

250 Hz

 ±

500 Hz

 ±

500 Hz

 ±

4.5 kHz

  

1 When using F1A the identification procedure is the following : Before the start of the identification transmission the carrier shall jump to a frequency 250 or 400 Hz below the nominal frequency and shall be morse-keyed to the nominal frequency. After the identification transmission, hence after at least 7 dot lengths, the frequency shall jump back to the nominal frequency.