Specifications

LR-2000 Manual V1.4 Page 13 of 20
9.4 LARGE TRUCKS AND BUSES
Follow the general suggestions for vehicles in Sections 9.2 and 9.3, regarding the location of the reader mounting (beside the
vehicle lane or over the center of the lane). Select the UHF card or tag that performs best in the combination of vehicle lanes,
vehicle types, reader locations, and credentials characteristics. See Figure 4 and Figure 5.
9.5 MIXED VEHICLES OF ALL SIZES
Use the LR-2000HiLoMA reader set, consisting of a Master Reader and a Remote Antenna. Mount the Master and Remote units
on adjustable brackets at locations that are suitable for the type of tags and cards that will be used in the different vehicles.
The reader brackets are usually supported by a single pole or pedestal, at heights that assure clear line of sight between the readers
and the tags in all vehicles. (To reduce cable length, it is often best to mount the Master Reader lower than the Remote Antenna.
Invert the units so that the coaxial connectors are at the bottom edge.)
Aim the readers individually at the locations of tags and cards when they are at the sweet spots for the two vehicle types or sizes.
9.6 SPECIAL CONDITIONS
The LR-2000HiLoMA reader set may be used also to spread out the effective RF field so that it covers a larger continuous area.
(The read range does not become longer, but the cross-section size of the field may become larger.)
Spreading the field horizontally is helpful when –
• the vehicle lane turns – for example, the lane to the gate carries vehicles that turn off a through street, or
• the vehicle lane is wider than a single lane, and some vehicles may be farther from the edge of the lane where the reader is located.
Spreading the field vertically is helpful when –
• tags are on a mix of small and large vehicles, requiring the readers to be aimed at different heights to read all tags, or
• the reader is on a hill, or at the crest or dip in a hill, causing the tags to be at variable heights when they are read, or
• the reader is near a change in the elevation of the lane surface, as at a curb or gutter or drain.
Figure 6. Mixed passenger vehicles and large trucks -- using LR-2000HiLoMA.
The LR-2000HiLoMA has a single data interface to a single reader port on the host panel. This reader set uses a single
reader address in the host system.
10 PLANNING FACTORS
10.1 INTRODUCTION
Preparation for the LR-2000 installation pays dividends for the installer. The following topics cover the common questions.
These topics apply generally to all forms of the LR-2000 reader. The environmental, electrical, interference and temperature range
characteristics likewise apply to all forms of the LR-2000 reader. These characteristics are optimized if a buried-loop vehicle sensor
arms the reader for RF transmission only when a vehicle is present at the reader.