[time-nuts] Getting my Rockwell D200 GPS to work

[Rob Kimberley]

Don,

I've been following this thread and did some research on your module. See
below, as there may be some clues, especially on connection of Pin 10, Pin
13.  Both need to be +5V, Pin 10 keeps the RTC powered (so that if you
switch of GPS, you don't lose almanac). Pin 13 looks like it needs to be
kept at +5V to turn on GPS. This may be where your problem lies. I find it
difficult to believe that all three units are faulty.

Good luck!

Rob Kimberley
____________________________________________________________

The Rockwell 12-channel GPS module (Part number: TU00-D200-401) module is
high performance, low power, 12-channel GPS receiver.

Its far reaching capability meets the sensitivity requirements of car
navigation as well as other location-based applications.

Dimension: 50.98 x 71.12 x 12.29 mm

Antenna Connector: MCX

This GPS module communicates to your computer or other system via a custom
20-pin interface (for pin-out see below) using NMEA-0183 (ASCII) over TTL.

A TTL to RS-232 adaptor will need to be built for communications to a
standard PC.

Pin-out for this unit is as follows:

Pin 1: Antenna power input. Normally 3-5 volts. Maximum 12v, 100mA.
Pin 2: GPS unit power input. 5.0 volts DC. Draws approximately 175mA.
Pin 4: NMEA/Binary mode select. +5v for NMEA. Ov or floating for binary
mode.
Pin 5: Battery backup for RTC only (internal clock). 2.5-5 volts.
Pin 6: Serial Data Out. Output of GPS messages. 0/5v level RS-232 signal.
Pin 7: Time Mark Out. IHz (1PPS) timing output.
Pin 8: CTS/DTR Serial Data control. Ov or floating for normal. 5v stops
serial output.
Pin 9: Serial Data In. Commands or data sent into GPS here. 0/5v level
RS-232.
Pin 10: Battery backup for Sram and RTC. 2.5-5 volts.
Pin 13: Master Reset. +5v to turn on GPS. Ov or floating to turn off and
reset.
Pin 18: Serial Data In from DGPS correction receiver. 0/5v level RS-232
Pin 20: Baud Rate select. Ov for 4800 baud. 5v or floating for 9600 baud.

Pins 3, 11, 14, 17, 19 all Grounded

Pins 12, 15, 16 No Connection

http://ke6mto.files.wordpress.com/2010/07/gps2b.pdf

http://ke6mto.files.wordpress.com/2010/07/gps2a.pdf

_______________________________________________________________



-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Don Lewis
Sent: 07 January 2012 00:24
To: 'Discussion of precise time and frequency measurement'
Subject: [time-nuts] Getting my Rockwell D200 GPS to work

Can someone please give me some pointers (my first time with a GPS module).

 

A little hand-holding, pls.

 

I bought three of these Rockwell D200 GPS receivers. (It's little GPS PWB
with an antenna connector and pins for connecting to the RS232- PC)

 

All three 'appear' to work the same way (no apparent capture of satellites).

 

Here's what I have:

 

1.	VisualGPS installed and running.
2.	A small USB-RS232 card installed and appears to be operational.
3.	Small GPS active antenna plugged in.
4.	VisualGPS monitor just repeatedly displays:
$GPGGA,,,,,,0,00,,,,,,,*66
5.	I think I understand this to be NMEA code to mean no satellites have
been acquired.
6.	The Rockwell D200 draws ~180ma (5V) with no antenna and ~190ma with
the small active antenna plugged in.

 

What am I doing wrong?  Other than maybe cheap china gps' and antenna???
But it is what I could afford and thought it would be cheap to learn on.

 

Thanks for your help.

 

-Don

 

 

 

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