2
Technical Specification
RT4722
1 Technical Specification
Conforms to all relevant international requirements and resolutions as agreed by ETSI, IEC, ITU, and IMO as well as
other national requirements. These specifications include ETS 300 162, ETS 300 338, IEC 945, IEC 1097-3 and IEC
1097-7.
General information
Normal channels All int. ch’s for 25 kHz operation.
Up to 40 private channels.
Opt. channels All int. ch’s for 12.5 kHz operation.
Up to 224 ch’s with up to 54 private ch’s.
Channel spacing 25 kHz / opt. 12.5 kHz
Frequency range Rx/Tx: 150.800 MHz - 157.425 MHz.
Rx: 160.625 MHz - 163.6 MHz.
Operating modes Simplex/Semi-duplex/duplex.
Modulation G3EJN for telephony receiver
G2B for DSC signaling
Frequency stability ±10 ppm/ opt. ± 5 ppm
Aerial connectors Standard 50 ohm female, SO239
Temperature range -15° C to +55° C
Supply voltage 13.2V DC Nominal
Supply range 10.8V DC to 15.6V DC
Supply current Stand-by 0.14A
Transmitter on 1.5A (Low power)
Transmitter on 6.5A (High power)
Transceiver dimen. H*W*D 100*200*259mm.
Transceiver weight 3.9 kg
Receiver
Sensitivity for:
12 dB SINAD -118 dBm or 0.28 µV p.d.
AF rated power
Output 1 4W/ 4 Ω
Output 2 6W/ 4 Ω
Distortion THD Below 5%
Signal/noise ratio Better than 40 dB
AF response - 6 dB/octave
Spurious emission Below 2 nW
Spurious resp. att. More than 70 dB
9945
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