Operations and Maintenance Manual

MPR 4.1

Reader Maintenance Instructions

Confidential UM UM360479-100 Revision: Draft B4 Page 75 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: To avoid interference and loss of data between

adjacent reader, readers must be synced.

Tests should be carried out under live traffic conditions to ensure that RF signal reflections that come

off moving vehicles do not cause inteference.

If Reader-to-Reader RF interference exceeds the in-band limits then the Readers must be

synchronized

Reader-to-Reader synchronization

Reader-to-Reader synchronization requires the following programmable options on the web

interface:

• Synchronization Search Time (maps to sync frame timeout in MPR2)

• Synchronization Delay (new feature not supported in MPR2 used for cable delays)

• Synchronization Frame Start Delay

• Sync Recovery Time (currently hardcoded default 20ms in MPR2)

• Sync Recovery Attempt Limit (new feature not supported in MPR2)

• Sync on Skipped Sync Frame

Note: Reader-to-Reader Sync Recovery occurs on a loss of synchronization with the external

reader network.

Synchronization search time

Synchronization search time indicates how long the reader waits for reader to reader sync before

falling into synchronization recovery.

If the reader detects synchronization prior to the expiry of this timer, it exits search mode and

performs one of the following actions.

• Falls into Synchronization Delay if programmed

• Falls into synchronization frame start delay if programmed

• Begins firing its Frame sequence.

Synchronization delay

Synchronization delay indicates how long the reader holds its sync driver low after synchronization

has occurred. This feature is used to calibrate out cable length delays.