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Jackson Labs FireFly-1A GPSDO User Manual Download Page 9

© 2011 Jackson Labs Technologies, Inc.

3

FireFly-1A User Manual

2

Quick-Start 

Instructions

2.1 Powering Up the Unit

The unit is powered from a 8V - 14V DC source. The current is typically less than 0.15A at 12V. 
Connect a clean +12V power supply to J5. The connector style is a MolexPart Number 22-23-2031 
connector.

Warning:

Do not reverse the polarity of the power connector, this will damage the unit.

2.1.1 Major connections

The major connections and features of the FireFly-1A PCB are shown in :

Figure 2.1

.

Figure 2.1

Major connections to FireFly-1A

 

GPS 
Antenna 

+12V 

GND 

10MHz 

1PPS 

RS-232 RX 

RS-232 TX 

GND 

LOCK 
OK, ISP 

Summary of Contents for FireFly-1A GPSDO

Page 1: ...FireFly 1A User Manual Document 80200501 Version 1 2 Date 6 July 2011...

Page 2: ...FireFly 1A User Manual Copyright 2010 2011 Jackson Labs Technologies Inc...

Page 3: ...SATellite 8 3 3 2 GPS SATellite TRAcking COUNt 8 3 3 3 GPS SATellite VISible COUNt 8 3 3 4 NMEA Support 8 3 3 5 GPS GPGGA 9 3 3 6 GPS GGASTat 9 3 3 7 GPS GPRMC 9 3 3 8 GPS XYZSPeed 9 3 3 9 GPS POSitio...

Page 4: ...Vo TEMPCOmpensation 17 3 9 7 SERVo AGINGcompensation 17 3 9 8 SERVo PHASECOrrection 17 3 9 9 SERVo 1PPSoffset 17 3 9 10SERVo TRACe 18 3 9 11SERVo 18 4 Firmware Upgrade Instructions 21 4 1 Introduction...

Page 5: ...2011 Jackson Labs Technologies Inc iii FireFly 1A User Manual 6 Certification and Warranty 37 6 1 Certification 37 6 1 1 Warranty 37 6 1 2 Limitation of Warranty 37 6 1 3 Exclusive Remedies 38...

Page 6: ...FireFly 1A User Manual iv 2011 Jackson Labs Technologies Inc...

Page 7: ...ckson Labs Technologies Inc assumes no liability for the customer s failure to comply with these requirements 1 2 1 Grounding To avoid damaging the sensitive electronic components in the FireFly 1A GS...

Page 8: ...FireFly 1A User Manual 2 2011 Jackson Labs Technologies Inc...

Page 9: ...Connect a clean 12V power supply to J5 The connector style is a MolexPart Number 22 23 2031 connector Warning Do not reverse the polarity of the power connector this will damage the unit 2 1 1 Major...

Page 10: ...output strings The GPS receiver generates a 1PPS time signal that is phase synchronized to UTC This 1PPS signal is used to frequency lock the 10MHz Sine Wave output of the FireFly 1A GPSDO to UTC thus...

Page 11: ...tory settings may result in the unit s performance to deteriorate The commands to control the loop parameters are part of the servo command See also the SERVO Subsystem section below The individual co...

Page 12: ...FireFly 1A User Manual 6 2011 Jackson Labs Technologies Inc Figure 2 2 FireFly 1A phase compensation plot...

Page 13: ...dditional information regarding the SCPI protocol syntax can be found on the following web site http www scpiconsortium org Please refer to the document SCPI 99 pdf for details regarding individual SC...

Page 14: ...an industry standard navigation GPS receiver The GPGGA and GPRMC NMEA commands comprise all necessary information about the antenna position height velocity direction satellite info fix info time dat...

Page 15: ...cimal number indicating the lock state of the unit Please see section SERVo TRACe for a detailed description of the lock state variable The command allows capture of the position and other information...

Page 16: ...ize the GPS receiver 3 3 11 GPS This query displays the configuration position speed height and other relevant data of the GPS receiver in one convenient location 3 4 PTIME Subsystem The PTIME subsyst...

Page 17: ...n of the FireFly 1A with the GPS receiver The list of the commands supported for this subsystem is the following SYNChronization SOURce MODE GPS EXTernal AUTO SYNChronization SOURce STATE SYNChronizat...

Page 18: ...Receiver is not in holdover a value of 1 indicates the Receiver is in holdover 3 5 3 SYNChronization HOLDover INITiate The command will place the unit into a forced holdover state while still indicat...

Page 19: ...oo high and the UTC phase offset is 250ns then the following errors would be indicated 1 UTC phase 250ns 0x4 2 OCXO voltage too high 0x40 3 GPS in holdover 0x10 Oring these values together results in...

Page 20: ...ontrol ABSolute 3 6 1 DIAGnostic ROSCillator EFControl RELative This query returns the Electronic Frequency Control EFC output value of the internal reference oscillator It returns a percentage value...

Page 21: ...8400 57600 115200 SYSTem STATus SYSTem FACToryReset ONCE 3 8 1 SYSTem COMMunicate 3 8 1 1 SYSTem COMMunicate SERial ECHO This command enables disables echo on RS 232 This command has the following for...

Page 22: ...POS SERVo TEMPCOmpensation float 4000 0 4000 0 SERVo AGINGcompensation float 10 0 10 0 SERVo PHASECOrrection float 100 0 100 0 SERVo 1PPSoffset int ns SERVo QUIet ON OFF SERVo TRACe int 0 255 SERVo 3...

Page 23: ...nd adjusted over time by the Jackson Labs Technologies Inc firmware This command has the following format SERVo TEMPCOmpensation float 4000 0 4000 0 3 9 7 SERVo AGINGcompensation This parameter is a c...

Page 24: ...e Sats Tracked Lock State Health Status Please see the SYNChronization command for detailed information on how to decode the health status indicator values Note health status information is available...

Page 25: ...2011 Jackson Labs Technologies Inc 19 FireFly 1A User Manual SERVo AGINGcompensation SERVo PHASECOrrection SERVo 1PPSoffset SERVo TRACe...

Page 26: ...FireFly 1A User Manual 20 2011 Jackson Labs Technologies Inc...

Page 27: ...son labs com support html The Flash Magic utility is available for download on the Flash Magic website http www flashmagictool com 4 2 1 Philips LPC2000 Flash Utility The first is the Philips LPC2000...

Page 28: ...power on the unit is not in ISP mode Figure 4 1 Location of J2 4 4 Downloading the firmware Download the latest version of FireFly 1A firmware from the Jackson Labs Technologies Inc support website an...

Page 29: ...y Set the COM port in the LPC2000 application as needed on your PC B Select the Baud Rate of the LPC2000 utility to be 38400 or slower Faster Baud rates will not work properly C Press the READ DEVICE...

Page 30: ...load Press the OK button and the download should start Sometimes the utility gets confused and this process from item 4 4 B has to be tried several times It is not necessary to press reset as the util...

Page 31: ...2011 Jackson Labs Technologies Inc 25 FireFly 1A User Manual Figure 4 4 Flash Magic utility B Press the Select Device button and the window shown in Figure 4 5 will appear...

Page 32: ...FireFly 1A User Manual 26 2011 Jackson Labs Technologies Inc Figure 4 5 Device selection window C Expand the ARM7 folder and select the appropriate processor in this case the LPC2138...

Page 33: ...e unit will not operate and will have to be returned to the factory Checking this box on the ISP utility will thus void the warranty G Under Step 3 Hex File browse for the hex file that you downloaded...

Page 34: ...FireFly 1A User Manual 28 2011 Jackson Labs Technologies Inc...

Page 35: ...e data correctly If you encounter this problem it is recommended that you install GPSCon on a slower computer using Windows XP 5 2 Installation Follow the directions that come with GPSCon for installi...

Page 36: ...115200 parity to None Data Bits to 8 and Stop Bits to 1 Set Flow Control to None Once you have configured the communication parameters press the OK button to close the window 5 3 1 2 Auxiliary parame...

Page 37: ...2011 Jackson Labs Technologies Inc 31 FireFly 1A User Manual Figure 5 2 Setting the communications parameters...

Page 38: ...d such as paths for logging or exporting graphics 5 3 2 Sending manual commands to the receiver You can send SCPI commands manually by using the drop down box under the display window as shown in Figu...

Page 39: ...es the span setting To display all of the data in the file without manually setting the span to zero you should right double click in the graph This has the effect of setting the start time to zero th...

Page 40: ...have locked the start and stop time using the mouse you can scroll left or right through the data without changing the span To scroll to a later time use Shift Left click To scroll to an earlier time...

Page 41: ...ogfile contents Use the checkbox All to make this choice You may nominate a size in X and Y The file format may be BMP JPG GIF or PNG Your settings will be stored and will be the default next time you...

Page 42: ...ith and without GPS reception of course The OCXO heater current is shown in turqoise We can see it ranges from 0 135607A to 0 178146A The OCXO current jumps lower every 24 hours because the unit is si...

Page 43: ...tomer shall prepay shipping charges and shall pay all duties and taxes for products returned to Jackson Labs Technologies Inc for warranty service Except for products returned to Customer from another...

Page 44: ...kson Labs Technologies Inc products are not intended for use in medical life saving or life sustaining applications 6 1 3 Exclusive Remedies THE REMEDIES PROVIDED HEREIN ARE THE CUSTOMER S SOLE AND EX...

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