CalAmp ITC 220 Installation Manual - page 70
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User manual
Manual is about: Base Station, Locomotive & Wayside
RADIO TRANSCEIVER FOR RAILROAD PTC
of
88
ITC 220 Base Station Transceiver Installation Guide PN 133991 Rev. A
| Page 64
L1_TEST,SET,TXMOD,DQPSK_HALF
L1_TXDUTY,1000,300,0
where:
value equals the desired frequency of operation.
Note: The ratio of 300/1000 denotes a 30% transmit duty cycle.
2. Once observation of radio performance is complete, turn off transmit operations by typing:
L1_TEST,STOP
Note: Each figure in this section shows a typical transmission spectrum or power measurement of a locomotive radio.
Figure 26 Typical transmission spectrum (DQPSK)