User's Manual

Firmware
6-4
Considering the S95 as a reference, the parameters PTA, PTT, PTV and RSM were disabled for
TQ21.
Firmware
For the command IVN, TQ21 will display its firmware version TQ21 v3.01.06. or a higher version.
Hardware configuration parameters
Several parameters are used to set (configure) the hardware and must not be changed. If the TQ21's
firmware is going to be updated, these parameters must be first written down and reprogrammed if
were accidentally erased by the upgrading process.
These parameters are: HA0, HA1, HA2, HA3, HA4, HA5, HA6, HA7, HA8, HA9, HA9, HAA,
HV0, HV1, ISC and ISN.
NOTE: Do not use the command:CONFIGURE:DEFAULT without saving first the values of all
hardware parameters. This command will set all parameters to their default values, this way erasing
the factory settings for the hardware parameters. If you erase by accident these hardware
parameters, TQ21 loses its calibration (capability to measure carrier and deviation frequencies) and
must be recalibrated again.
Software configuration parameters
For an optimum operation of TQ21 we recommend the following setting: DFI=Y, DHX=N,
DAR=Y, RCC=0, REC=Y.
Operation
General conditions In order to minimize the measurement errors the following conditions must be met before you can
start testing transponders:
• Power-up TQ21 for at least 15 minutes;
• Transponders to be kept at the room temperature (22 ±5 °C) for at least 2 hours.
• The Data LED to be steady Off (no flickering); see also sensitivity threshold, par.2.2.
• TQ21 to measure the "Reference Tags" with errors smaller than ±3 kHz.
Testing Tags Using TQ21 it's possible to test the following performances of a tag:
• Carrier frequency of the UHF transmission for modulation logic level "1". Field CF displays
the difference in kHz between the measured carrier frequency and 433.800MHz.
• Dynamic frequency deviation of the UHF transmission. Field DF displays the difference in
kHz between the measured carrier frequency for modulation logic "1" and logic "0".
• User data content; field UD.
• Number of transmitted messages. This number can be determined by counting the number of