Operations and Maintenance Manual

JANUS

Multi-Protocol Reader 2.4 Maintenance Instructions

Confidential UM 360467-110 Revision: B Page 162 of 247

All information contained herein is proprietary to, and may only be used with express, written permission from, Kapsch TrafficCom Canada Inc.

FILE: UM 360467-110 REV B3 MPR 2.4 CLEAN.DOCX 03/02/2021 1:01

Kapsch TrafficCom

Circulator and the antenna. Ports 1 and 3 of the circulator are then connected to the RF modules using the

RF Adaptor Cables (800125-001).

Note: The circulators are weather resistant, but should be entirely wrapped in self-amalgamating tape to

ensure a water tight seal.

Figure 5-7: RF Cable Installation Schematic Bi-Static Operation

Figure 5-8: RF Cable Installation Schematic Bi-Static TDM Only Operation

Use of the RF amplifier

The maximum cable loss and associated maximum cable length, as defined in the RF Cable Specifications on

page 227, is based on the output power of the MRFM-S module and the sensitivity of the transponders. When

the site specific application exceeds the limits defined on page 227, an amplifier assembly can be used to

effectively increase the output power of the MRFM-S module an additional 6dB. This 6dB is then used to

increase the maximum cable loss permitted as defined on Page 227.