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datatrak:receivers [2020/06/01 02:39] – [Mk.II series (including Mk.IId)] philpemdatatrak:receivers [2022/10/26 15:00] (current) – [Mk.I] philpem
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-====== Datatrak Locator receiver variants ======+====== Locator receiver variants ======
  
-There are several variants of the Datatrak receiver (known as Locators).+There are several known variants of the Datatrak receiver, all of which are known as Locators.
  
  
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 I have yet to see a Mk.1 Locator "in the wild". I have yet to see a Mk.1 Locator "in the wild".
  
 +The Locator shown on BBC Tomorrow's World in 1987 could be a Mk1, or a prototype Locator:
  
 +{{:datatrak:receivers:datatrakmk1-tomorrowsworld.jpg?direct&400|}}
 ===== Mk.II series (including Mk.IId and Mk.II TrakBak) ===== ===== Mk.II series (including Mk.IId and Mk.II TrakBak) =====
  
-{{:datatrak:receivers:datatrakmk2.jpeg?nolink&400|}}+{{:datatrak:receivers:datatrakmk2.jpeg?direct&400|}}
  
-Typically seen in black, but were also available in silver.+These units were available in black and silver, but black seems to be the most common.
  
-TrakBak units have a blank ROM-bay cover in place of the one with the "Datatrak" logo+There were at least two variants available: 
 + 
 +  * Nav-only receivers don't include an EPROM for the 8032 secondary processor, and usually entirely omit the UHF transmitter and PA board. 
 +  * Trakbak receivers include the EPROM and UHF transmitter, and replace the "Datatrak" cover on the software ROM slot with a plain one.
  
 ==== Physical construction ==== ==== Physical construction ====
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 Four screws secure the front panel, with the same on the rear. There are two PCBs internal to the unit -- a UHF power amplifier on the top of the metal shield plate, and the processor and LF receiver on the base board. Four screws secure the front panel, with the same on the rear. There are two PCBs internal to the unit -- a UHF power amplifier on the top of the metal shield plate, and the processor and LF receiver on the base board.
 +
 +The UHF PA may not be present in some units. These units will typically be navigation-only and have no Radio EPROM. There is a "costdown" variant of the main PCB which omits the 8032 secondary processor, ROM, RAM and support components.
 ==== Power supply section ==== ==== Power supply section ====
  
 The Mk.II accepts power through a 3-pin XLR connector. This carries the 13.8V vehicle DC supply voltage, ground and an ignition sense wire. Turning on the ignition powers on the receiver. Normally a loss of ignition sense will cause the receiver to shut down. The Mk.II accepts power through a 3-pin XLR connector. This carries the 13.8V vehicle DC supply voltage, ground and an ignition sense wire. Turning on the ignition powers on the receiver. Normally a loss of ignition sense will cause the receiver to shut down.
  
 +The XLR pinout is shown on the page [[datatrak:mk2pinout|]].
 ==== LF receiver section ==== ==== LF receiver section ====
  
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  • Last modified: 2020/06/01 02:39
  • by philpem