ThingMagic M5e-Compact - Manual (Page 34)

Frequency Setting
34 Functionality of the Embedded Modules
Frequencies used in the order of entries in the table.
If necessary for a region, the hop table can be randomized to create a pseudo-random
sequence of frequencies to use. This is done automatically using the default hop tables
provided for each region.
EU3 Region
By default the frequency hop table for the EU3 region will use four channels. In addition to
the default configuration the EU3 region can also be used in a single channel mode.
These two modes of operation are defined as:
Single Channel Mode
Set by manually setting the frequency hop table to a single frequency. In this mode
the module will occupy the set channel for up to four seconds, after which it will be
quiet for 100ms before transmitting on the same channel again.
Multi Channel Mode
Set by leaving the default or manually setting more than one frequency in the hop
table. In this mode the module will occupy one of the configured channels for up to
four seconds, after which it may switch to another channel and immediately occupy
that channel for up to four seconds. This mode allows for continuous operation.
PRC Region
The PRC specifications limits channels 920 to 920.5MHz and 924.5 to 925.0MHz to
transmitting at 100mW or below. The default hoptable on the Mercury5e and M5e-
Compact uses only the center channels which allow 2W ERP, 1W conducted, power
output. If the hoptable is modified to use the outer, lower power channels the RF level will
be limited to the outer channels limit, 100mW or +20dBm
KR2 Region
The first frequency channel (917,300kHz) of the KR2 region will be derated to +27dBm to
meet the new Korea regulatory requirements. All other channels operate up to +30dBm.
In the worst case scenario, each time the derated channel is used it will stay on that
channel for 400ms. The fastest it will move to the next channel, in the case where no tags
are found using that frequency, it will move to the next channel after 10 empty query
rounds, approximately 120ms.