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datatrak:receivers [2020/06/01 02:39] – [Mk.II series (including Mk.IId)] philpem | datatrak:receivers [2022/10/26 15:00] (current) – [Mk.I] philpem | ||
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- | ====== | + | ====== Locator receiver variants ====== |
- | There are several variants of the Datatrak receiver | + | There are several |
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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' | ||
+ | {{: | ||
===== Mk.II series (including Mk.IId and Mk.II TrakBak) ===== | ===== Mk.II series (including Mk.IId and Mk.II TrakBak) ===== | ||
- | {{: | + | {{: |
- | 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 " | + | 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, | ||
==== 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 " | ||
==== 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: | ||
==== LF receiver section ==== | ==== LF receiver section ==== | ||