User's Manual

New parameters and commands
6-3
The functionality of the Tag Qualifier TQ21 can be configured by parameters. These parameters
can be set from a PC connected through a standard serial interface RS232 to the TQ21. The
parameters and commands supported by TQ21 are quite similar with those listed in the Reference
Guide for System S21 with the following modifications.
New parameters and commands
Parameter:DFA
Type:Bit (Read/Write)
Range:Y/N
Default value:Y
Description:Enable (Y) or disable (N) the transmission of the flags using S21/S96 format. When
enabled, TQ21 transmits the received messages using the S21/S96 format for the flags field
(including the ReceivedID information). If disabled, TQ21 transmits the received messages using
S95 format for the flags field.
Parameter:DFI
Type:Bit (Read/Write)
Range:Y/N
Default value:Y
Description:Enable (Y) or disable (N) the frequency measurement for the UHF received signal.
When enabled, TQ21 transmits together with the received messages data about the carrier
frequency and frequency deviation of the received UHF signal (CF and DF). If disabled, TQ21
transmits the received messages using the format defined by DFA parameter.
Parameter:PME
Type:Bit (Read/Write)
Range:Y/N
Default value:Y
Description:Enable (Y) or disable (N) the transmission of the excitation signals using a Manchester
encoding format. When disabled, TQ21transmits the excitation signal using the S95 format. If
enabled, TQ21 ignores the status of the parameters REN and RTF (it operates with the default
values REN=N and RTF=Y).
Parameters and commands disabled