Radio Communication - FDS TBox-41 User Manual

TBox-Radio

5. Radio communication

Every time an impulse is received from a WINP/WIRC, the corresponding input LED flash on the
TBox-Radio and an acknowledgement is sent back to the WIRC/WINP.
WIRC/WINP radio protocol will resend any message several times if no ACK is received form the
TBox-Radio.
Radio transmissions cannot be 100% guaranteed. An unfavorable environment, lack of line of
sight, interference or an improper installation might lead to the loss of data.
FDS cannot be held responsible for any of the above.
5.1. Time delay and precision
In case of a good radio communication with no interference, the time delay from the IR
beam detection to the generation of a time event by the TBox-Radio will vary from 10ms to
150ms depending of the selected Group. In case of interferences this delay might reach a few
seconds. However, whatever the delay value, the TBox-Radio takes this delay into account
and generates a corrected time event with a precision of 1/10'000 sec.
6. Mini-USB / USB-C
The USB connector has various functions including:
 External power supply and battery charging
 COM port emulation for RS232 communication and data transfer
- Time of day (protocol FDS, TAG Heuer, Alge, Seiko)
- Configure the TBox-Radio options and parameters (with the app "TBox-Setup")

4GB USB Flash Drive (2GB for model TBox-40)
- All impulse data is stored in a .csv file on the TBox internal SD drive
A new file is created every time the TBox-Radio is swiched ON
- A log file is updated in an event of a firmware crash.
- User needs to maintain sufficient memory availability to ensure storage of data
- The space required for a competition of 1000 times is approximately 40 Kbytes
- Flash Drive access is only possible when the TBox-Radio is turned OFF
February 2023 - Version EN 2.5
www.fdstiming.com
User manual