TransCore encompass 4 - Select RF-By-Input Control (Factory Default)

Commands
7-35
Command #6400
disables RF-by-input control command #641 Select RF-by-Input
Control.
Reader response:
Done
641 Select RF-by-Input Control (Factory Default)
Command #641 configures the reader for RF-by-input control. The reader automati-
cally turns on RF when it detects a presence through
sense0. The reader turns off RF
according to the selected RF control algorithm (#692N Select RF Control Algorithm).
Reader response:
Done
642NN Select RF Operating Frequency
Caution
The authorized bands in the U.S. for CW frequency (i.e., ATA only) is 902.25 to
903.75 MHz and 910.00 to 921.50. The authorized frequency band for modulated
frequency is 91
1.75 to 921.75 MHz.
Note: RF fr
equency can be set for backward-compatibility using command #642NN
or for the newer 250-kHz step method using command #647XXX.
Command #6
42NN sets the reader RF frequency from 902 to 928 MHz in 500-kHz
steps, where NN is a hexadecimal value from 00 to 34. After the reader’s frequency is
set, the value is stored in battery-backed RAM (non-volatile RAM, NVRAM). This
value is NOT altered by power-down, loading default parameters, or a flash download
of new software (there is no default frequency value). It can only be changed by
issuing command #642NN.
Additionally, if the NVRAM becomes corrupted, the correct
operating frequency can-
not be guaranteed. In this circumstance, the RF sec
tion will shut down and the reader
will send an error message to the host (Error 06). Until the frequency is reset using
command #642NN after NVRAM corruption, the unit will display the same error
message every time it is powered up or if an attempt is made to enable the RF (by host
or by external sensor). The commands to set the RF frequency are listed in Table 7-14.
Table 7-14 RF Frequency Commands
Command RF Frequency (MHz)
Approved for
Use
in the U.S.
(ATA only)
Approved for
Use in the U.S.
(modulated)
64200 902 No No