Installing the Encompass 4 Reader
4-23
Mounting the Antenna
If you are using the Encompass 4 Reader that requires an external antenna in perma-
nent installations, the antenna should be positioned as close as possible to the Encom-
pass 4 Reader. Long cable runs increase system sensitivity to noise. See Table 2-6 on
page 2-22 for maximum RF cable lengths.
Before you connect the external antenna to the Encompass 4 Reader, you must per-
form the following voltage discharge procedure.
Discharging Voltage from the External Antenna
Use these instructions to discharge high voltage from the external antenna before pro-
ceeding with further pre-installation testing of the reader connected to an external
antenna.
Required Equipment
This procedure requires the following equipment.
• TransCore Encompass 4 Reader (external antenna models only)
• External antenna
• RF cable
• N-type load (e.g., 50 ) or RF attenuator (e.g., 20 dB)
Discharging the Voltage
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