Transmitter
Chapter 14: Technical Speci
fi
cations
Table 14-7
Transmit Specifications – TETRA (Continued)
Transmitter Specification
Value or Range
Adjacent-channel Power due to Switching
-50 dBc
Adjacent-channel Power due to Linearization
-30 dBc
Tx Conducted Emission
100 - 250 kHz
250 - 500 kHz
500 - frb kHz
At receive band
-80 dBc
-85 dBc
-90 dBc
-100 dBc
Intermodulation Attenuation
70 dB
RF Input Impedance
50
Ω
(nom.)
Table 14-8
Transmit Specifications – TEDS
Transmitter Specification
Value or Range
QAM (TEDS) Transmitted Power (10, 20 Watts
depending on the con
fi
guration) measured at RFDS
antenna port:
Normal Conditions:
Extreme Conditions:
10 W, 20 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 TEDS BR: 2W - 32 W
Base Radio Power Limits above are
also applicable for 800 MHz.
Transmitter Power Control
12 dB
Transmitter Modulation Accuracy
10% RMS/Burst
Synchronization
1/4 symbol
Adjacent-channel power (25kHz)
Offset
25
50
75
Limit
-55
-65
-67
Adjacent-channel power (50kHz)
Offset
37.5
62.5
87.5
Limit
-55
-63
-65
Adjacent-channel Power due to Switching
-45 dBc
14-8
6802800U74-N September 2009
Содержание DIMETRA MTS 2
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