ITC 220 Base Station Transceiver Installation Guide PN 133991 Rev. A
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Caution
– The following table shows the limits of the RF power output of the radio transceivers. Settings
outside this range for operation for an antenna are out of FCC compliance.
It is the user’s responsibility to confirm that settings are within compliance.
Table 11 Rated RF Power Output
Parameter
Wayside Transceiver
Locomotive Transceiver
Base Station
Conducted Carrier
Output Power Rating
25 W PEP nominal
50 W PEP nominal
75 W PEP nominal
Adjustment range
7.5 to 25 W
15 to 50 W PEP
10 to 75 W PEP*
*7.5 W PEP is +38.7 dBm peak. Average power would be about 3 dB less. The base range of 10 to 75 W is less than a 9 dB range.
I.3 MEASURE FULL-RATE RECEIVER SENSITIVITY
I.3.1 PRIMARY/RX1 RECEIVER MEASUREMENT
To begin the test, make sure the E4438C signal generator is outputting the proper wave form into the RX1 port on the
transceiver. Next, issue the following commands in XtermW:
STOP
SCHED,DEL,ALL
DSP_MODE,IDLE
DSP_MODE,TEST
L1_TEST,SET,RXPATH,P
L1_TEST,SET,RXENABLE,3,ON
L1_TEST,SET,RXFREQ,value,3
DSP_CMD,SET,BER,RAW
L1_TEST,START,RX
DSP_CMD,BAC,3
SCHED,I,6,L1_TEST,GET,ERRCOUNTS,3,3
where:
value
equals the desired frequency of operation.
Once observation of radio performance is complete, turn off transmit operations by typing:
L1_TEST,STOP
