Use With Qcx, U3S, Clock, Vfo, Progrock Etc. Kits; Status Leds - QRP Labs QLG2-SE Manual

Horizontal installation: The SMA connector happens to fit the board nicely too in the
horizontal, edge-mounted position. Place it with the center pin on the top side of the board,
and two of the corner pins on the bottom side, and solder in place. The other two ground
pins can be ignored. This works very well.
3.2

Use with QCX, U3S, Clock, VFO, ProgRock etc. kits

In this application, you need only plug in the antenna coax
SMA connector and the QLG2-SE is ready to use. It is
entirely compatible with the former QLG1 kit and the 4-way
pin header pads at the right side of the board can be used in
the same way as a QLG1 kit.
+5V power can be supplied to the module via the +5V
connection if desired.
These signals are also available on the 6-way pin header
pads at the bottom of the board edge.
3.3

Status LEDs

Just like it's predecessor the QLG1,
the QLG2-SE module has the same
three LED status LEDs.
In the case of QLG2-SE, these are
0603-size SMD LEDs installed on
the PCB near the GNSS receiver
module.
LED 1 (red) is the Power LED and is
always lit when QLG2-SE is
powered.
LED 2 (yellow) is the Serial data
LED and pulses in time with the serial data. Note that in a departure from the QLG1, this
LED is actually OFF during the data burst (whereas on QLG1 it is ON during the data
burst). The reasons for this are explained later, in the circuit explanation section.
LED 3 (blinding green) is the 1pps indicator and flashes once per second, for 0.1 seconds,
coincident with the 1pps pulse whose leading edge indicates the exact UT second. This
LED only starts blinking once a satellite lock (3D fix
computation) has been achieved.
Together, these three LEDs provide an accurate
diagnosis of correct operation of the QLG2-SE.
Connecting external LEDs
You may wish to use external LEDs instead of the
onboard ones. For example, you may wish to make
QLG2-SE manual 1.00
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