QRP Labs QLG2-SE, Руководство пользователя

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With reference to the above photograph, looking anti-clockwise from left:
•
GNSS Module: The E108-GN01 GNSS receiver module, multi-satellite system
capable (GPS and Beidou enabled by default).
•
Antenna SMA Connector (supplier): Can be board edge-mounted or at 90-degrees
standing up on the board (
DO refer to important assembly instructions later ).
•
LED enable jumpers: these are wired by default, and connect the signals to the
onboard LEDs. If you wanted to use external LEDs for example in a front panel, you
would cut the tiny traces under these jumpers (see later section).
•
Status LEDs:
◦
Power (RED): always lit
◦
Serial Data (Yellow): flashes once per second in time with the serial data burst
◦
1 PPS (Blinding Green): flashes once per second when a 3D satellite lock is
acquired
•
External LED connect: Three LEDs may be connected here using wires if you prefer
external LEDs to the onboard SMD LEDs.
•
6-pin interface: this provides six pads:
◦
GND
◦
GNSS 1pps
◦
GNSS serial data
◦
No connection
◦
RxD serial data
◦
+5V power supply input
•
Option Jumpers: configure how the serial port pads are connected, allowing either
2.8/3.3V logic or 5V logic levels
•
Break-strip: this line of drilled holes allows you to easily snap off the right-hand part
of the board, if you would like a smaller board (53 x 37mm)
•
4-pin interface: pads for QCX, U3S etc: the standard QRP Labs 4-pin connector:
+5V, Gnd, Serial Data (TxD) and 1PPS. There are two 4-pin connectors, they are
wired in parallel, so that you can use either one depending on whether or not you
break apart the PCB (see above).
•
Prototyping areas – the unused space on the PCB is populated by a 0.1-inch pitch
matrix of tinned through-holes where you can add your own components if you need
to.
•
Spare AND-gate: one of the four AND gates in the 74AC08 is not used, you can use
it as a buffer if you need to.
•
Space for Ultracap: 5mm-spaced pads suitable for installation of an Ultracap for
ephemeris backup purposes; this provides faster hot-start.
The board size is 80 x 37mm, and the holes in the four corners are at exactly the same
positions as on the Ultimate3S, Clock and VFO kits; therefore the board can be stack-
mounted behind these kits on suitable spacers (12 or 25mm).
These features will be described in more detail in subsequent sections.
QLG2-SE manual 1.00
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