User's Manual

Specifications
HPT225BT VHF Modem Specifications
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1.3. Transmitter Specifications
Table 3 lists the transmitter specifications.
Table 3. Transmitter Specifications
1.4. Receiver Specifications
Table 4 lists the receiver specifications.
Table 4. Receiver Specifications
Parameter Specification
Output Power
EU
USA (217 - 220 MHz)
USA (220-222MHz)
Canada
25 dBm to 40 dBm in 1 dB step (320 mW to 10W)
25 dBm to 33 dB m in 1 dB step (320 mW to 2W)
25 dBm to 44 dB m in 1 dB step (320 mW to 25W)
25 dBm to 44 dB m in 1 dB step (320 mW to 25W)
Output Power Control Accuracy ±1.5 dB (at normal test conditions)
Carrier Frequency Stability ±1.5 ppm initial stability over temp with
±3.0 ppm aging/year
Max. Frequency Error ±1.0 kHz (at normal test conditions)
±1.5 kHz (under extreme test conditions)
Adjacent Channel Power (Conducted)
25/12.5/6.25 kHz CS USA, Canada
25/20/12.5 kHz CS EU
Part §90.210 (C, D, E)
Clause 4.2.4 EN 300 113-2 (60 dBc)
Spurious Emission (Conducted) -36 dBm (9 kHz – 1GHz)
-30 dBm (1GHz – 4 GHz)
Spurious Emission (Radiated) -36 dBm (9 kHz to 1 GHz)
-30 dBm (1 GHz to 4 GHz)
Parameter Specification
Noise Figure 3 dB
Receiver Sensitivity DBPSK
(BER 1x10-4, 25 kHz CS DQPSK
D8PSK
D16QAM
GMSK
-116 dBm 25kHz / -117 dBm 12.5kHz
-115 dBm 25kHz / -116 dBm 12.5kHz
-110 dBm 25kHz / -111 dBm 12.5kHz
-106 dBm 25kHz / -107 dBm 12.5kHz
-113 dBm 25kHz / -114 dBm 12.5kHz
Dynamic Range -115 to –15 dBm
Max. Input Signal Level -10 dBm
Co-channel Rejection -8 dB for 25 kHz Channel Spacing
-12 dB for 12.5 kHz Channel Spacing
-16 dB for 6.25 kHz Channel Spacing
Adjacent Channel Selectivity 70 dB for 25 kHz Channel Spacing
60 dB for 12.5 kHz Channel Spacing
50 dB for 6.25 kHz Channel Spacing