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Chapter 1 Getting Started

1-22 HawkEye™ 40T User Manual Rev 2.0.0, Jan 2009

Radio Range and Transferring Data

The HE40T radio is a Class 1 device. If connected to another Class 1 device, the

reader has roughly a 300 foot line of sight operating range. If connecting to a

Class 2 or Class 3 device, the operating range may drop to match the lower range.

Once a reader is connected, the application software on the host must be open to

receive data.

When the HE40T detects the radio is out of range, the HE40T will store data on

the reader’s non-volatile memory. The reader will continue to try and send data

until radio is back in range. Once the data is sent, the data will be erased from the

reader’s memory. If the radio cannot connect in 90 seconds, it will give an error

beep. The reader will continue to try and connect until it has reached the

programmable radio timeout setting.

The HE40T Bluetooth protocol allows for two forms of communication:

• One Way Mode — Defined as one way communication between the reader

and host. One Way mode is only recommended when connecting to a device

well within its specified range, or if connected to a device without an

operating system (i.e., printer). There are two settings in this mode:

– Max Range (Default) — Greater range but data reliability is lower

– Max Reliability — Limits range but reliability is improved

FIGURE 1–28. RF One Way Mode Codes

Note: While robust, One Way Mode doesn’t guarantee data integrity and you

may have data loss when operating in the fringes of radio range or in the presence

of radio interference.

RF One Way Mode

(Max Range)

RF One Way Mode

(Max Reliability)

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Microscan HE40T Bedienungsanleitung Seite 32