Operations and Maintenance Manual

MPR 4.1

Reader Maintenance Instructions

Confidential UM UM360479-100 Revision: Draft B4 Page 94 of 246

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

FILE: UM360479-100 REV B4 DRAFT WIP MPR-4.1 READER OPERATIONS AND MAINTENANCE MANUAL (002).DOCX

05/25/2022 11:18

Kapsch TrafficCom

ATTENTION: When installing or replacing a MPR 4.1, RF cables, or antenna, the lane

must be re-tuned.

The Synchronization circuit

Synchronization is required between readers located within reader-reader interference range, or

which have overlapping or near-adjacent capture zones, or which may have RF signal reflections

(interference) due to any one or combination of varying vehicle sizes, varying traffic patterns or fixed

site terrain features. The sync feature eliminates interference between the readers that might

otherwise reduce system performance. The synchronization circuit connects MPR 4.1 readers

together in a star network. All readers connected on a sync circuit shall be configured with the same

or compatible frame sequence.

Prerequisites: Sync hub terminal block mounted in a location central to the Readers.

Note 1: The exact location of this terminal block should be marked on a site map to aid system

maintenance.

• Readers arranged so that no Reader is farther than 1500 ft. (457.2 m.) from the sync hub

terminal block

• Readers arranged so that the total synchronization network cable length is no greater

than 2000 ft. (609.6m.).

• No more than six (6) Readers in the synchronization circuit

Note 2: It is recommended that each synchronization cable have two or more spare conductors to

support future service repair calls.

Installing a synchronization circuit

1. Connect the Readers to the Sync hub terminal block as in Figure 5-10 on page 95.

Attention: Ensure that cables do not connect from the GND terminal on the MPR 4.1 to the

Sync hub terminal block, as this can create a ground loop and affect

synchronization performance.

Note: Before you continue, you will need to gain access to the web interface through a

computer or service laptop connected to the Lane Controller port of the Reader. See the

following procedures for more information.

• Connecting a service laptop to the Reader on page 34

• Changing the service laptop IP address on page 34

• Testing the connection to the reader on page 35

• Accessing the Web interface on page 35