Cf gps receiver jul 05, 2002 user’s guide gm-270
2 table of contents 1. Introduction ……………………………………………………………………………………….. 3 1.1 overview …………………………………………………………………………………….. 3 1.2 features …………………………………………………………………………………….. 3 2. Brief information ……………………………………………………………….………………… 5 2.1 hardware interface …………………………………………………………………………… 5 2.2 software in...
3 1. Introduction 1.1 overview 1.2 features the gm-270 provides a host of features that make it easy for integration and use. 12 parallel satellite-tracking channels for fast acquisition and reacquisition。 high speed signal acquisition using 1920 time/frequency search channels. Built-in hardware tra...
4 led 2. Brief information 2.1 hardware interface 2.1.1 gm-270 dimension 91 (l) x 50 (w) x 20 (h) mm 2.1.2 hardware interface external antenna connector.
5 a. Link to pda b. Link to notebook.
6 2.1.3 led & external antenna ◆ led led off gm-270 cf gps receiver switch off. Led on gm-270 cf gps receiver signal searching. Led flashing gm-270 cf gps receiver signal position fixed. ◆ external antenna connector (mcx)…..Optional as using gm-270 cf gps receiver in a rv car, truck or bus, it might...
7 units m meters age of diff. Corr. Second null fields when dgps is not used diff. Ref. Station id 0000 checksum *18 end of message termination table 2-3 position fix indicator value description 0 0 fix not available or invalid 1 gps sps mode, fix valid 2 differential gps, sps mode, fix valid 3 gps ...
8 name example units description message id $gpgsv gsv protocol header number of messages 2 range 1 to 3 message number 1 range 1 to 3 satellites in view 07 satellite id 07 channel 1 (range 1 to 32) elevation 79 degrees channel 1 (maximum 90) azimuth 048 degrees channel 1 (true, range 0 to 359) snr ...
9 3. Functional test ◆ install guide： 1. Install gpsviewer.Exe from pc to your pda (microsoft pocket pc os or alike). (1) install microsoft activesync to your pc, refer to your pocket pc manual for installation procedure. (2) setup your pocket pc cradle to desktop pc uart port. The microsoft actives...
10 2. Push “start”→”programs” bottom→“ gps viewer” 3. Push “scan” bottom to scan your com port. Select your com port (com 1〜com 10)， then push “open gps” bottom..
11 4. Select “gps status” to show the satellite diagram like below..
12 4. Trouble shooting problem reason solution weak or no gps signal can be received at the place of gm-270 cf gps connect an external antenna which locate as a open space to your gm-270 cf gps and then press reset button no position output but timer is counting at outdoor space but gps signal is bl...
13 5. Specifications tracks up to 12 satellites. Receiver: l1, c/a code snap start: period). Update rate: 1 hz. Acquisition time reacquisition 0.1sec.Averaged hot start 8 sec., averaged warm start 38 sec., averaged cold start 45 sec., averaged position accuracy: non dgps (differential gps) position ...
6. Warranty the gm-270 is warranted to be free from defects in material and functions for one year from the date of purchase. Any failure of this product within this period under normal conditions will be replaced at no charge to the customers..
