Thingmagic Astra-EX Manuel d'utilisateur télécharger pdf (Page 66)

Reader RF Power

M6 and Astra-EX User Guide 66

Reader RF Power

During initial installation, the reader must be properly configured to use the correct RF

power to comply with FCC or other regional regulations. DO NOT increase the power

beyond this level.

The M6 and Astra-EX supports separate read and write power level which are command

adjustable via the MercuryAPI. Power levels must be between:

– Minimum RF Power = +5 dBm

– Maximum RF Power = +31.5 dBm (+0.0/- 0.5 dB accuracy above +15 dBm)

Note

The maximum RF Power setting for the Astra-EX integrated antenna is 30dBm.

WARNING!

Operation using an RF Power setting above 30 dBm requires a

professional installer.

Power Settings for Authorized Antennas and Cables

This device has been designed to operate with the antennas listed in Authorized

Antennas list using the cables in the Authorized Cables list. For any combination of

antenna and cable the maximum RF power is determined from antenna gain (Max Linear

Gain value from antenna list) and antenna cable loss (Insertion Loss value from cable list)

using the formula:

Pmax = 36 dBm - Antenna Gain + Cable Loss

For example, for the Laird S8658WPL and the ThingMagic CBL-P6 6ft cable the following

calculation can be performed:

Max linear antenna gain = 6 dBiL

Minimum cable insertion loss = 0.8 dB

Pmax = 36 - 6 + 0.8 = 30.8 dBm

The maximum RF power that may be set using this configuration is 30.8 dBm (see

Warning above).

For more information about setting the RF power, refer to Setting the Reader RF Power

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Thingmagic Astra-EX Manuel d'utilisateur Page 66