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 Looks like hand saw used to make notch for ant. coax |
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 Rakon: 10.949297 MHz |
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| The
joint between the two large boards seems to be
intermittent and is the cause of the DOA. After the receiver has been powered on for a few minutes it turns itself off, maybe that's normal. |
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Description
This is about the same size as a hand held GPS receiver, but has no front panel. The idea is that it can be used to integrate GPS functionality with other equipment. For example a GPS can be connected to a radio so that every time the radio is keyed it also sends it's location using encryption. Anything (tank, airplane, &Etc.) can have it's position added to a data bus so all it's components know not only where they are but also the precise time and velocity. PVT stands for Position, Velocity and Time and are the key outputs of GPS).
The flat surface is for mounting and the curved surface is for the built-inAeroAntenna Technology AT575 (Fig 4 below). This antenna family is used by the PLGR and DAGR receivers for L1 only operation and considering the vintage of this receiver and that antenna I'd guess this is an L1 only receiver like the PLGR.
There is a board only version of the DAGR called the GB-GRAM that allows integrating GPS into other equipment. So the HNV-960 probably has some nickname for doing the same sort of thing, but this includes the antenna and backup battery. There's two jacks, one has 5 sockets and the other has 6 sockets. That's unusual since power connectors are typically plugs.
If you have any literature on this unit please let me know.
Connectors
External
5 socket Lemo
Wire colors: wht/vio, wht, gry, vio, blu
Because DC power is on the other connector this is probably data I/O and timing.
7 socket Lemo
Wire colors: Grn, Wht, Red, red, blk, blk, org
both red wires are connected to each other. (DC input power)
both black wires are connected to each other and ground.
Green and White may be on/off or other power control lines.
The Orange wire is connected to J2 on a pin that next to the pin used for the backup battery so may be related to that?
Internal
The main board has:
J1 Coax connector for antenna input (& maybe DC power to antenna).
J2 2x40 surface mount header used for connecting the two external connectors and based on the GB-GRAM it has options for different uses of the that would be given different nomenclature (HNV-961, &Etc.)
In Fig 6 below on the back side of the mother board just below where the 2x40 header you can see three brown wires going to what's probably a transistor that's wired to one of the pins (but not connected to either external connector, maybe for some test function or a function not used in the HNV-960.
J3 2x15 header - maybe for internal programming (JTAG?)
The backup battery has it's wires soldered directly to the main board, probably for reliability reasons.
Photos
Fig 1
Fig 2
Fig 3
Fig 4
Fig 5
Fig 6
page created 20 Apr 2012.
