MINTER User's Manual
Contents
1. 1 POSITIONING SYSTEMS MINTER User s Manual Revision July 08 1999 USER S NOTICE Specifications are subject to change without notice JPS provides this manual as is without warranty of any kind either express or implied including but not limited to the implied warranties or conditions of merchantability or fitness for a particular purpose For updated manuals and software or product release information you may visit JPS WWW site at http www javad com or contact JPS Customer Support by e mail support javad com Copyright 1998 Javad Positioning Systems All rights reserved Table of Contents GENERAL DESCRIP TION yaiicsacestaceapeciueheiatcuenunieinabametduatouuataeaunesdantcuadewsloaiGdnsuaruhimuassennaun PWR KEY AND STAT PED wisissicistscecctscstranisdcancssidecnavdsdvantndeducnacdndvas cattducucdaceuancwandtnaniacss FN KEY AND REG LED xlix cs Dor lura br dann HOW TO CLEAR scrinia dix d v ERR n EE EE rA RE D Rd EXTENDED INFORMATION MODE enne nnne nnns INTERNAL MODEM OPERATION STATUS nnns General Description MINTER MINimum INTERface is a simple user interface that consists of two keys and two LEDs which can control FN and display the operation of the receiver MINTER brings a new level of automation to the GPS field R2. spread spectrum radio modem To switch to mode click either FN button on MINTER two times one if already in El mode Click means push and quickly release inside one second To switch back to normal blinking click either button once again 1 When modem is turned off the STAT LED blinks short red 2 times per second 2 When modem is turned on but no data is transmitted received LED blinks long red 2 times per second 3 When modem sends data LED blinks long yellow two times per second 4 When modem receives data LED blinks long green two times per second
3. EC operation Its function is similar to what is available on advanced photo cameras where the camera takes several light and distance measurements adjusts all the settings of the camera and conveys the ready status of the camera by a green light for the photographer to push the button Behind the simple appearance of MINTER there are sophisticated algorithms and tests that ensure reliable data collection and recording MINTER performs the following functions e Turns the receiver On or Off or put it in the Sleep mode When in Sleep mode the receiver will turn on in response to any activity on the RS232 port e Turns data recording On or Off e Shows the number of GPS and GLONASS satellites that are being tracked e Shows data recording status e Shows each time data is recorded to internal memory MINTER has one Satus STAT LED and one Recording REC LED Each LED has three colors red green and yellow MINTER has an ON OFF key PWR and a function key FN MINTER also has protection against stuck keys e g when a key is held down unintentionally for a long time by other objects in a backpack PWR Key and STAT LED To turn on the receiver push the PWR key and release it To turn it off press the PWR key for more than 1 and less then 4 seconds during this period the STAT LED remains off to assist you To put the receiver into Sleep Mode press the PWR key for more than 4 and less than 8 seconds during this per
4. cates a hardware problem with data recording e g memory is full The green light of REC LED blinks each time the data is written to the internal file The data recording time interval is what has been programmed in the receiver by a hand held interface device or a computer Each time data recording is turned off and on either a new file is opened and automatically named by the receiver using date and time or data is appended to a particular file depending on the receiver configuration Holding the FN key for more than 5 and less than 8 seconds will turn baud rate of the serial port A to 9600 After about 5 seconds of holding the FN button the REC LED becomes red and you need to release FN button while REC LED is red during next 3 seconds Holding the FN key for more than 8 seconds has no impact After turning the receiver on loading a new firmware or clearing the receiver NVRAM receiver checks its internal file system During this operation the REC LED flashes yellow and the file system is not accessible for CDU applications or for data recording This operation may require from fractions of a second to several seconds depending on the reason it started and the amount of the internal memory The table below summarizes FN key functions and REC LED statuses FN key REC LED Meaning dus Internal file system test in progress yellow Off No data recording Gran Data i
5. de one second To switch back to normal blinking click either button once again two times if an internal modem is present In the El mode receiver blinks 7 times per cycle Each blink could be yellow red or green Yellow means that information for test isn t available Green means test is passed Red means test is failed 1 Delimiter It is easily distinguishable double blink Its color is calculated from colors of other blinks It is yellow if at least one of blinks is yellow It is red if no other blinks are yellow and there is at least one red blink It is green in all other cases Enough data for position computation GPS S N ratio is good see below GLONASS S N ratio is good see below Oscillator frequency offset is not more than 3 ppm Oscillator s Allan Variance is better than 2 7e 10 d E M ee Continuous tracking time is more than 15 minutes Thresholds for S N ratios dB Hz are CA L1 P L1 P L2 GPS 51 39 39 GLONASS 51 49 40 The simple interpretation of testing requires only delimiter double blink color to be watched for If it is green all is OK if it is yellow need to wait more if it is red some tests failed With good receiver antenna and observation conditions all blinks should be green in 10 minutes after power on Internal Modem Operation Status This information mode is available only if the receiver is equipped with an internal
6. iod the STAT LED is yellow While in Sleep Mode any activity on an RS 232 port will turn the receiver on If you press the PWR button for more than 8 seconds it will be ignored This is done to protect the receiver operation against stuck keys When the receiver is ON and no satellites are tracked the STAT LED is red Instead this LED will blink as follows 1 Green for each GPS satellite being tracked 2 Pause if at least one satellite has the energy potential more than 48 db Hz red blink instead 3 Yellow for each GLONASS satellite being tracked 4 Pause if the receiver can estimate its navigation position red blink if it can t For example if 8 GPS and 5 GLONASS satellites are being tracked the STAT LED repeatedly blinks 8 greens and 5 yellows between successive pauses or reds FN Key and REC LED Holding the FN key for less than 1 second click either switches between different information modes normal extended information internal modem status or between static and dynamic post processing modes depending on the receiver configuration During the first second of holding the FN key the REC LED is yellow Holding the FN key for more than 1 and less than 5 seconds will start stop data recording During this period the REC LED is green The status of data recording is shown by the REC LED Data recording is ON when REC LED is green or yellow data recording is off when this LED is OFF If REC LED is red it indi
7. s recording dynamic or unknown Not pressed post processing mode Vallow Data is recording static post processing mode R Hardware problem with data recording ed memory full No data recording is pressed less than 1 second Yellow Release to change the information mode from 1 to 5 seconds Green Release to start recording romi Red Release to turn the Serial A speed to 9600 bps more than 8 seconds Off No function Data recording is pressed G Release to change the information mode reen or post processing mode to static sethan depend Vall Release to change the post processing mode to dynamic No function hardware problem with Red recording more than 1 second Turns data recording off How to Clear NVRAM It is possible to clear NVRAM using only MINTER To do that Turn the receiver OFF pe coe ees 6 Release FN button Press and hold FN button Press and release PWR button to turn the receiver ON Wait until both LEDs will light green Wait around five seconds until both LEDs will blink yellow Note that LEDs will blink yellow only during next five seconds and to clear NVRAM it is essential to release FN button when they blink yellow Extended Information EI Mode In this mode the receiver continues work as usual but the STAT LED indicates extended information useful for test purpose To switch to El mode click either FN or PWR button on MINTER Click means push and quickly release insi
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