MTS 2 and MTS 4 Installation, Con
fi
guration and Basic Service Manual
Transmitter
Transmitter
The Transmit speci
fi
cations for TETRA are listed in
and the Transmit spec-
i
fi
cations for TEDS are listed in
In
and
, all speci
fi
cations are observed at RF distribution
system output, unless otherwise stated.
Table 14-7
Transmit Specifications – TETRA
Transmitter Specification
Value or Range
Pi/4 DQPSK Transmitted Power (10, 25, 40 Watts
depending on the con
fi
guration) measured at RFDS
antenna port:
Normal Conditions:
Extreme Conditions:
10 W, 25 W, 40 W
+2.0 dB
+3.0/-4.0 dB
Transmitter Power (off/standby)
-36 dBm/-40 dBc
Frequency Stability
± 0.007 ppm
Stability with site reference connected
to station and locked to GPS.
Base Radio Power Limits
High Power BR: 5W - 80 W
Low Power BR: 2W - 36W
Base Radio Power Limits above are
also applicable for 800 MHz.
Transmitter Power Control
12 dB
Carrier Feedthrough
-26 dBc
Transmitter Modulation Accuracy
6% RMS/Burst
(30% peak/symbol)
Synchronization
1/4 symbol
Adjacent-channel Power due to Modulation (Normal
Conditions)
± 25 kHz
± 50 kHz
± 75 kHz
-60 dBc (800 MHz:
-55 dBc)
-70 dBc (800 MHz:
-65 dBc)
-70 dBc (800 MHz:
-65 dBc)
Adjacent-channel Power due to Modulation
(Extreme Conditions)
± 25 kHz
± 50 kHz
± 75 kHz
-50 dBc (800 MHz:
-45 dBc)
-60 dBc (800 MHz:
-55 dBc)
-60 dBc (800 MHz:
-55 dBc)
6802800U74-N September 2009
14-7
Содержание DIMETRA MTS 2
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Страница 476: ...Introduction Chapter 16 MTS 4 Outdoor Enclosure This page intentionally left blank 16 2 6802800U74 N September 2009 ...
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