ITC 220 Base Station, Locomotive & Wayside Radio Transceiver Field Service Guide PN 0046300120 Rev. A
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Transmitter
RF Power Output:
Base Station:
75 W PEP; adjustable to 10-75 W PEP
Locomotive:
50 W PEP; adjustable to 15-50 W PEP
Wayside:
25 W PEP; adjustable to 7.5-25 W PEP
Output Impedance:
50 ohms; Operating VSWR < 3:1
Modulation Waveforms:
Base & Locomotive: 16 kbps pi/4DQPSK (linear); 32 kbps pi/4DQPSK (linear)
Wayside:
16 kbps pi/4DQPSK (linear)
Occupied Bandwidth:
Meets 47CFR90.210 (f), five aggregated channels
Modulation Designators:
Base & Locomotive: 16 kbps: 8K90DXW; 32 kbps: 17K8DXW
Wayside:
16 kbps: 8K90DXW
Conducted Spurious Emissions:
– 25 dBm max.
Max. Duty Cycle Rating:
Base Station:
50 %
Locomotive:
30 %
Wayside:
10 %
Receiver
Maximum Usable Sensitivity, Static BER<10
-4
:
16 kbps -111 dBm; 32 kbps -108 dBm
Adjacent Channel Selectivity:
70 dB at 25 kHz offset
Spurious Response Rejection:
70 dB
Intermodulation Response Rejection:
65 dB
High Input Level (-7 dBm)
Locomotive only: BER < 10
-4
Blocking (1 MHz offset)
80 dB
Number of Simultaneous Receiver Channels:
Base Station (24V & 48V) and Locomotive: Sixteen (16) paired as: eight (8) diversity;
seven (7) 16 kbps; one (1) auto 16 kbps/32 kbps
Wayside:
Two (2) (no diversity support): One (1) 16kbps;
one (1) auto 16 kbps/32 kbps
1.3
PHYSICAL DESCRIPTION
1.3.1
BASE STATION TRANSCEIVER
The ITC 220 Base Station Transceiver is housed in a 4 unit-height (allow 5 unit height to mount with a vented shelf
underneath), 19-inch rack-mountable sheet metal chassis. Repositionable brackets allow for mounting the chassis in
forward or mid-plane positions in 19-inch channel-rack installations.
1.3.1.1
BASE STATION TRANSCEIVER DIMENSIONS
Overall dimensions of the ITC 220 Base Station Transceiver are 19.15 in. width × 17.74 in. depth × 6.96 in. (4U) height,
as shown in Figure 1, which follows.