User manual

Chapter 6: Tekterm Application
802.IQ v2
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Psion Teklogix 8525/8530 Vehicle-Mount Computer User Manual
Radio Address
Important: “Radio Address” only takes effect when “Cellular” is
enabled (set to “Y”).
The value entered in the “Radio address” parameter is used to identify the 8525/8530
vehicle-mount over the radio link. A unique value from 1 to 3840 must be assigned for each
8525/8530.
Initial RTT (Round Trip Time)
Round trip time is the elapsed time between an 8525/8530 vehicle-mount computer
transmission and an access point acknowledgement. Each 8525/8530 continuously
adjusts the acceptable round trip time, calculating the average elapsed time over a
number of transmissions. If an acknowledgement takes longer to receive than the
average round trip time calculated, the 8525/8530 will send the transmission again.
Because 8525/8530s cannot calculate an average round trip time without a number
of transmissions, a starting point or “Initial Round Trip Time” is required. The 8525
uses the time assigned to the “Initial RTT” parameter as a starting value for round
trip calculations. Once the 8525 begins transmitting and receiving data, this value
will be adjusted to reflect the actual average round trip time between transmissions
and acknowledgements.