Hi Jason,
I figured out a different pin assignments
hold the PCB so that the SMA antenna connector is looking to right and under
the PCB.
open- 1 2- Ant powerpresently connected to pin nbr 4
TX- 3 4- Main power +3 volt
RX- 5 6- 1PPS
open- 7 8-
Hello everyone,
After reading quite a bit from your archives i've decided to try a put together
a 10MHz reference.
I've picked up a oncore M12+T GPS card and have tried to initialise it but
without any success thus far.
The user manual for the M12+T seems to suggest that i should be able to
http://www.economist.com/news/technology-quarterly/21603232-horology-mechani
cal-watches-are-leaving-their-digital-cousins-dust?fsrc=scn/tw/te/tq/ed/hite
chworldoldworlwatch
Not a lot of detailed data to compare, but interesting reading nevertheless.
First off if you are getting PPS on the PPS pin the GPS is working. By
default I don't think the MT12 outputs any serial data unless in response
to a query. By default it is not a NEMA device.
The protocol is binary so it would be rely hard to control it with a Window
terminal program
The
-the M12 uses positive TTL serial port logic: a MAX232 or equivalent
is the best you can use to connect the receiver to the PC with theWin
OnCore software
-the M12, by default, doesn't output nothing: use commands to get any
response (or use the WinOncore), no activity can be expected from an
I don't recall seeing this mentioned here before but if it has been, or if
it's just something everyone else has always taken for granted, then
apologies in advance from a comatose brain cell for the wasted bandwidth.
Until today I'd not previously seen either an NTGS50AA or an NTBW50AA
Pin 1 is the serial input and shouldn't be left unconnected. By
default the M12 doesn't talk on the serial line: you must give a
command and get the answer. There are commands to program the M12 to
talk on the serial port every n seconds. First get the manual (there
are many in the wild) for
Thanks for all the replies so far. (I didn't expect them so quickly :) )
I'm measuring the voltages on Pins 1 and 2 when connected to a max3232 so
neither pin is floating.
I have the manuals for the M12 and am aware that it's not NMEA.
The Winoncore software isn't a terminal it is Motorola GPS
Chris is correct many GPS receivers do not output anything till queried.
Further it seems the TX and RX data may need to be swapped. That has bagged
me a few times because it depends on the perspective. Easier to just try
swapping them.
The max series does indeed perform the the logic translation
Note however that the M12+T’s I/Os are 3V, not 3.3V and not 5V.
On Jun 11, 2014, at 19:46 , paul swed paulsw...@gmail.com wrote:
Chris is correct many GPS receivers do not output anything till queried.
Further it seems the TX and RX data may need to be swapped. That has bagged
me a few times
I have had great difficulty getting various MAX3232's to work reliably on 3 ..
3.6V.The datasheet shows the capacitor values you need to use for various
voltage ranges... but no joy. The DC-DC converter does not produce the proper
output voltages. Check the V- and V+ nodes for around +/-
Progress :)
I can switch between 1PPS and 100PPS but still nothing received from the M12.
Stephen
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