PI P192-S Manual

Telemetry radio

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P192-S Telemetry radio

APPLICATION NOTE

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Summary of Contents for PI P192-S

Page 1 Research P192-S Telemetry radio APPLICATION NOTE...
Page 2 Pi P192-S Telemetry Radio Application Note Pi P192-S Telemetry Radio Application Note...
Page 3 Pi Research reserves the right to revise this publication from time to time, and to make changes in the content hereof without obligation to notify any person of such revision or changes.
Page 4: Table Of Contents
Contents Introduction ....................6 Licensing information ..............6 Car radio installation ................7 Installing a P192-S radio in a car ........... 7 Car radio transmit antenna ............. 8 P192-S as a pit receiver ................. 11 Power supply ................11 Pit data loom ................. 11 Diversity receiving function ............
Page 5 Parts numbering ..................28 Dimensions ..................... 29 Declaration of conformity ..............30 Conditions Of Use ................ 31 FCC Authorisation ................ 31 Contact information ................32...
Page 6: Introduction
The Pi telemetry system provides reliable data transmission from a car to the pits as the car travels around the track. A P192-S radio in the car transmits the telemetry data and a P192-S radio in the pits receives the transmissions. The received telemetry data is passed to a PC for processing and display.
Page 7: Car Radio Installation
Installing a P192-S radio in a car The P192-S radio needs a power supply between 12 to 30 volts DC. If you are connecting the telemetry system to a Pi System, the radio loom connects battery power to the radio system.
Page 8: Car Radio Transmit Antenna
The ground plane should be circular and have a radius at least equal to the length of the antenna; The ground plane must not make electrical contact with any part of the vehicle chassis that is likely to conduct, for example, carbon fibre. Pi P192-S Telemetry Radio Application Note...
Page 9 Fibre glass body panels To fit the antenna to a fibre glass body panel: Locate a suitable panel, that can be removed easily for access to the antenna loom. As fibre glass is electrically non-conducting, you can stick the copper foil directly to the underside of the panel.
Page 10 WARNING: It is important that the TNC connectors of the feed loom do not vibrate against any other conducting surfaces such as Lemo connectors or the chassis floor, as this will result in radio frequency noise and a loss of signal. Pi P192-S Telemetry Radio Application Note...
Page 11: P192-S As A Pit Receiver
P192-S as a pit receiver The P192-S radio can be used in a car as a radio transmitter or in the pit as a radio receiver. The pit car transmitter frequency and the pit receiver frequency must be the same. Refer to the section Configuring the P192-S for information.
Page 12: Diversity Receiving Function
Time Representation of multi-path fading The Diversity Receiving Function of the of the P192-S means that when receiving, the P192-S actively monitors the strongest signal from it’s two receiving antennas. It is unlikely that an Anti-Node will occur simultaneously at both antennas, hence superior coverage can be achieved when compared to a non-Diversity Receiving radio.
Page 13: Pit Receiver Antenna
2 metres away from any other transmitting antenna. The antennas should be connected to the P192-S pit unit by low loss coaxial cables, Pi Research Part Number 03I-0566-variant (variant refers to the loom length, which can be specified at the time of order).
Page 14: Connecting Antennas
AutoSport connector. Both TNC connectors of a P192-S will receive radio signals. P192-S as a transmitter When a P192-S is used for transmission only, an antenna must be connected to the TNC connector NEAREST the Autosport connector. See the figure Connecting antennas below.
Page 15: Configuring The P192-S
Configuring the P192-S Radio configuration utility To enable the P192-S to be configured, a software utility application for the PC and a programming loom are supplied. The configuration utility application is supplied on a CD-ROM. To install the configuration utility application: Insert the CDROM into the CD drive of the PC.
Page 16 P192-S configuration start-up screen After a short delay the Pi Research P192-S Telemetry Radio Configuration dialog replaces the P192-S configuration start-up screen. Pi Research P192-S Telemetry Radio Configuration dialog You can change the COMM port which the configuration utility connects to.
Page 17 Radio Frequency Setting Note: Licensing of the P192-S is the responsibility of the radio’s operator. Both the car and pit radios must be configured to communicate on the same frequency. Enter the required frequency into the Radio Frequency text box.
Page 18 If you have set a frequency outside of the valid range, the following error message appears. Error message: Set valid frequency If you have set a frequency that is not divisible by 25kHz an error message appears. 25kHz boundary error message Pi P192-S Telemetry Radio Application Note...
Page 19 Set Pi Defaults button It is not recommended to use the Set Pi Defaults button, unless instructed to do so by Pi Research Support. Use of this feature will disable any custom configuration that may have been performed by Pi Research.
Page 20: P192-S Status Led's
P192-S status LED’s The P192-S has a number of LEDs which indicate the status of the unit. The table below lists the LEDs and their meaning when the LEDs are on. Colour Meaning Transmitting radio signal Orange Noise on frequency...