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DATA SHEET NUMBER 

NR7020-RO 

REVISION 

DATE 

040522 

 

Page  #: 

1 of 4 

www.novuspower.com 

 

 

NR7020-RO 

Miniature Low Noise OCXO Rubidium Reference  

 

 

 

This atomic reference brings exceptional stability in a very 
small, low power and economic package. It offers a 
Rubidium reference, low phase noise  options in a 5

” x 

3.4

”X1.33 aluminum chassis. There are 10 MHz low phase 

noise sine output,  or 10MHz LVCMOS output, plus a PPS. 
 
This atomic reference affords exceptional holdover stability 
of less than 0.3 ppb/month. Temperature stability of 1ppb.  
To further enhance stability, the Rubidium source is 
available with a GNSS locking option. All channels are 
monitored for a fault condition and built-in test monitors 
critical circuits which drives BITE and serial indicators. 
 
   

 

Rubidium Atomic 
Reference 

 Aging < 4E-10/month 

 

Phase Noise  

Offset Frequency Typical 
(Hz)         (dBc / Hz) 

  10           -120 

100          -145 
1K            -155 
10K          -160 

 

 

 

 

 

 

 
Output 

10 MHz,0.5 Vrms sine, or Square Wave (SMA) 

 

Содержание NR7020-RO

Страница 1: ...e sine output or 10MHz LVCMOS output plus a PPS This atomic reference affords exceptional holdover stability of less than 0 3 ppb month Temperature stability of 1ppb To further enhance stability the R...

Страница 2: ...output 12 minutes Frequency Accuracy 1E 11 Stability Allan Deviation 1s 3E 10 10s 1E 10 100s 3E 11 Phase noise for 10MHz Sine Standard Low Noise Option NR700 RO 10Hz 83 120dBc 100Hz 115 145dBc 1000Hz...

Страница 3: ...6 dB Noise Figure 2 0 dB Out of Band rejection Fo 50MHz 60 dBc Fo 60 MHz Remote interface control Protocol RS232 Connector DB 25 Male Location Rear panel Protocol Bit plus stop Standard Baud Rates Sel...

Страница 4: ...Power Products LLC All rights reserved This document is provided for information purposes only contents are subject to change without notice It is not warranted to be error free nor subject to any ot...

Страница 5: ...GNSS Receiver Communications Specification NMEA 0183 All information provided herein is the proprietary property of Novus Power Products L L C The information included may be reproduced without the pe...

Страница 6: ...MAT 17 6 PROPRIETARY NMEA INPUT SENTENCES 18 GNSS SATELLITE SYSTEM CONFIGURATION 4 8 19 FIXMASK SETTING OF POSITIONING AND SATELLITE MASK 4 20 PPS SETTING OF PPS PULSE PER SECOND 4 FORMAT 22 RESTART R...

Страница 7: ...PER SECOND PPS 4 FORMAT 44 CRY TPS3 OUTPUT TIME TRANSFER INFO PER SECOND SURVEY TRAIM FORMAT 46 CRZ TPS4 OUTPUT TIME TRANSFER INFO PER SECOND FREQUENCY 3 FORMAT 48 CRM MEASUREMENT DATA OF GPS 50 CRN...

Страница 8: ...data NMEA Standard sentence NMEA Proprietary sentence Output data NMEA Standard sentence NMEA Proprietary sentence Note 1 Communication speed can be changed into 4800 9600 19200 38400 57600 or 115200...

Страница 9: ...58 2 Serial data output timing 4 The output timing of serial data is synchronous with PPS output timing Serial data is begun to output in the 25ms to 75ms range after PPS is output The time of serial...

Страница 10: ...ceeding pages is a wildcard meaning any valid talker ID data field Variable or fixed length fields preceded by delimiter comma Comma s are required even when valid field data are not available i e nul...

Страница 11: ...ngth fields preceded by delimiter comma Layout is maker definable checksum field 8 bits data between and excluding and are XORed and the resultant value is converted to 2 bytes of hexadecimal letters...

Страница 12: ...ill be output every second The sentences can be independently enabled and disabled using the PERDCFG NMEAOUT and or PERDAPI CROUT command described later in this document as well as use differing tran...

Страница 13: ...g 1 Valid fix 2 DGPS positioning 00 12 1 8 Horizontal dilution of precision HDOP 0 0 50 0 Note A null field is output while positioning is interrupted 9 Altitude above below mean sea level geoid 10 Un...

Страница 14: ...North South 00 0000 59 9999 N or S 3 4 Longitude ddd degree 000 180 mm mmmm minute 00 0000 59 9999 5 a East West UTC hh hour E or W 00 23 mm minute 00 59 ss sss second 00 000 59 999 6 Status 6 A or V...

Страница 15: ...ning 00 32 8 Horizontal dilution of precision HDOP 0 0 50 0 Note A null field is output while positioning is interrupted 9 Altitude above below mean sea level geoid 10 Geoidal height 11 Age of differe...

Страница 16: ...n a Example GNGSA A 3 09 15 26 05 24 21 08 02 29 28 18 10 0 8 0 5 0 5 1 33 GNGSA A 3 79 69 68 84 85 80 70 83 0 8 0 5 0 5 2 30 2D 3D Auto switching mode 3D fix Satellite used 09 15 26 05 24 21 08 02 29...

Страница 17: ...161 40 50 47 163 44 1 67 GPGSV 4 4 14 42 48 171 44 93 65 191 48 1 60 GLGSV 3 1 09 79 66 099 50 69 55 019 53 80 33 176 46 68 28 088 45 1 76 GLGSV 3 2 09 70 25 315 46 78 24 031 42 85 18 293 44 84 16 24...

Страница 18: ...Users manual Appendix A Revision A Date 07 14 15 Page 14 of 58 Satellite number from 93 to 99 indicates QZSS 193 to 199...

Страница 19: ...00 59 9999 a North South N or S 5 6 Longitude ddd degree 000 180 mm mmmm minute 00 0000 59 9999 a East West E or W 7 Speed kts 8 True Course degree 9 Date dd date mm month yy last two digits of the ye...

Страница 20: ...Date 07 14 15 Page 16 of 58 Example GNRMC 012344 000 A 3442 8266 N 13520 1233 E 0 00 0 00 191132 D V 0B UTC 01 23 44 000 Differential 34 deg 42 8266 min N 135 deg 20 1233 min E Speed 0 0 kts True Cour...

Страница 21: ...oning System Mode Indication A D or N A Autonomous D Differential N Data Invalid Example GNVTG 0 00 T M 0 00 N 0 00 K D 26 True Course 0 00 degrees Speed 0 00 kts 0 00 km h Mode Differential ZDA Time...

Страница 22: ...Users manual Appendix A Revision A Date 07 14 15 Page 18 of 58 6 Proprietary NMEA Input Sentences These sentences are input commands for the protocol of this receiver...

Страница 23: ...an be set to 0 or 2 for each satellite system User can also set SBAS mode to 1 Mode 0 means to disable the system Mode 1 means to enable tracking only do not use in position fix etc Mode 2 means to en...

Страница 24: ...ites indicated by this field are not used in the position fix calculation Lowest order bit means SV 01 Highest order bit means SV 32 4 8 Prohibit SVs GLONASS 28BIT HEX 0 GLONASS Satellite number mask...

Страница 25: ...S BIT9 SVID 9 GLONASS mask GLONASS BIT1 SVID 65 SBAS mask SBAS BIT18 SVID 50 Notes It is applied not only to First Fix or the time of a positioning return but to all thepositioning It is omissible aft...

Страница 26: ...o 1 0 PPS output interval 0 1PPS A pulse is output per second 1 PP2S A pulse is output per two seconds 5 pulse width 1 to 500 200 PPS pulse width ms 6 cable delay 100000 to 100000 0 PPS cable delay ns...

Страница 27: ...ment of PPS by TIMEALIGN command The default is UTC USNO As for details please refer to the page of TIMEALIGN command The condition of PPS synchronization is the follow 1 GPS alignment 2 UTC USNO alig...

Страница 28: ...Notes 4 As for the differences depending on the restart mode please refer to the page of Backup of the Receiver Parameters for BBRAM The data which is stored by FLASHBACKUP command in Flash is not cle...

Страница 29: ...conditions User needs not to set initial time because time is decided by satellite navigation data As for GPS week rollover timing and GT 87 week rollover timing please refer to the follow event date...

Страница 30: ...Format PERDAPI TIMEZONE sign hour minute hh CR LF 1 2 3 4 Num Contents Range Default Remark 1 TIMEZONE Command Name 2 sign 0 to 1 0 GMT sign 0 shows positive 1 shows negative 3 hour 0 to 23 0 GMT Hour...

Страница 31: ...the threshold value is 0 it is not used 5 latitude 1 90 to 90 0 Latitude for hold position in TO mode degree A positive number means the north latitude and a negative number means the south latitude...

Страница 32: ...Users manual Appendix A Revision A Date 07 14 15 Page 28 of 58 Fixed position 37 78700 degrees north 122 45100 degrees west Altitude 31 5 m...

Страница 33: ...are configured the position mode changes to Position hold mode when either is fulfilled When the threshold value is 0 it is not used The displayed position may differ a little from the configured posi...

Страница 34: ...Users manual Appendix A Revision A Date 07 14 15 Page 30 of 58 J The condition of survey is satisfied Position mode is always started by time only mode if TO mode by this condition and power off Keep...

Страница 35: ...le from GCLK PPS edge Example PERDAPI FREQ 1 10000000 47 Mode output Frequency 10MHz Notes It is omissible after the 4th field The response which is inserted current value to each field is obtained by...

Страница 36: ...leap second is kept as user setting Example PERDAPI DEFLS 16 AUTO 27 Default leap second 16 second this value is updated automatically Notes It is omissible after the 3rd field This value is used befo...

Страница 37: ...arameter In Glonass only mode correct default leap second is needed to output correct time 2 UTC USNO alignment Leap second is applied to output time PPS is output in synchronization with GPS before t...

Страница 38: ...is required 1 OK UTC USNO alignment OK OK OK UTC SU alignment OK OK OK PPS GPS only fix setting GLONASS only fix setting GPS GLONASS setting GPS alignment OK OK OK UTC USNO alignment OK NG OK UTC SU...

Страница 39: ...two ways to backup data 1 BBRAM BBRAM is RAM which is available to store data as long as backup current is impressed GT 87 can store ephemeris data almanac data and configuration which user sets by co...

Страница 40: ...the sentence sec 0 The sentence s is are stopped N M 1 Sentence s is are output every event occurred 0 The sentence s is are stopped Example PERDAPI CROUT W 1 4E CRW TPS1 sentence is output every seco...

Страница 41: ...he value is 0 the sentence is output only once After that the sentence is stopped Example PERDCFG NMEAOUT GGA 2 57 Interval 2 seconds PERDCFG NMEAOUT GSV 0 56 GSV sentence is output only once After th...

Страница 42: ...manual Appendix A Revision A Date 07 14 15 Page 38 of 58 In case of using low baud rate please adjust size of output sentence by NMEAOUT command and CROUT command to output all sentence within one se...

Страница 43: ...RSION Software Version Format 1 Num Contents Range Default Remark 1 VERSION Command Name Example PERDSYS VERSION 2C GPIO General Purpose Input output Format 1 Num Contents Range Default Remark 1 GPIO...

Страница 44: ...fault Remark 1 command First field of received command 2 sequence 1 to 255 0 The number of times successful for the reception It is added 1 whenever it succeeds in command reception and 0 to 255 is re...

Страница 45: ...p second and applies it 4 update date 14 byte fixed length 00000000000000 Leap second update schedule year month day hour minute second This date indicates zero when no leap second update schedule 5 p...

Страница 46: ...Users manual Appendix A Revision A Date 07 14 15 Page 42 of 58 Pps status present pps is sync with UTC USNO...

Страница 47: ...Before first fix After first fix After taking confirmed leap second GPS RTC GPS GPS UTC USNO RTC GPS UTC UTC SU RTC GPS UTC About leap second which is used to adjust output time alignment Before first...

Страница 48: ...than estimated accuracy threshold 4 period 0 to 1 1byte 0 1PPS output interval 0 1PPS A pulse is output per second 1 PP2S A pulse is output per two seconds 5 pulse width 001 to 500 3byte 200 1PPS puls...

Страница 49: ...tput every second PERDAPI CROUT X 0 40 stops outputting this command Output Values of period pulse width polarity are switched by pps type LEGACY or GCLK PPS estimated accuracy means estimated differe...

Страница 50: ...55 3byte 000 3 Sigma threshold m which changes automatically to position fixed 5 time 0 to 999999 6byte 000000 Current update times of survey position sec It is not updated at the time of positioning...

Страница 51: ...ioning mode Survey mode calculation continuously 2 Survey sigma 3 m Survey sigma threshold 1 m Survey time 2205 seconds Survey time threshold 86400 seconds TRAIM solution OK 0 TRAIM status OK 0 Remove...

Страница 52: ...urate 1 GCLK PPS and GCLK frequency are accurate 5 e 999999 to 999999 7byte Phase delay between LEGACY and GCLK PPS no dimensional 6 de 999999 to 999999 7byte Amount of change of phase delay no dimens...

Страница 53: ...15 Page 49 of 58 PERDCRZ TPS4 1 1 0 000000 000000 000000 000000 000000 000000 0x15 0000 57 Freq mode warm up Freq status output GCLK accuracy accurate Notes This command is output every second PERDAP...

Страница 54: ...s 4 system 1 GNSS system ID 1 GPS 5 svid 1 to 99 Satellite number 6 reserve 1 to 3 Reserve field 7 snr 0 to 55 Signal to Noise Ration dB Hz 8 adr 32bit Accumulated Doppler Range Cycles LSB 6 9 doppfre...

Страница 55: ...a no parirt included Example PERDCRN 1 7 8B0B349809AC00424A2471C5FF9F27BB10C82EB5884CC987FFA50C0BF2A8 0C Notes For each GPS satellite decoding data this string is output once every 6 seconds For GPS t...

Страница 56: ...eld Example PERDSYS VERSION OPUS7_SFLASH_ES2_64P ENP622A1226410F QUERY N A 1A Notes Character string of the device and version is free format GPIO General Purpose Input output Format 1 2 Num Contents...

Страница 57: ...ION ON 19015 19 015 7C Notes This string is sent when certain events occur This is for eRide useonly ANTSEL Antenna selecting 1 Format 1 2 3 Num Contents Range Default Remark 1 ANTSEL Command Name 2 r...

Страница 58: ...sent when certain events occur This is for eRide useonly MSG Event Driven Message 1 Format 1 2 Num Contents Range Default Remark 1 key Alphanumeric event indicator 2 string Description of event Exampl...

Страница 59: ...YES YES NO YES 3 Altitude YES YES YES NO YES 3 Ephemeris Ephemeris data YES NO NO NO YES 2 Almanac Almanac data YES YES NO NO YES Chart Backup of the receiver parameter of command COMMAND NAME PARAMET...

Страница 60: ...Chart Backup of the configure parameter of command COMMAND NAME PARAMETER HOT WARM COLD FACTORY POWER OFF ON UART1 Baud rate of UART1 YES YES YES YES NO NMEAOUT NMEA output interval YES YES YES YES N...

Страница 61: ...rding to the terms and conditions of this document if a repair to your NOVUS product is required during the limited warranty period Our obligation at NOVUS is limited to repair or replace products whi...

Страница 62: ...Y ANY OTHER PARTY EXCLUDED DAMAGES SHALL INCLUDE BUT ARE NOT LIMITED TO COSTS OF REMOVAL AND INSTALLATION LOSSES SUSTAINED AS THE RESULT OF INJURY TO ANY PERSON OR DAMAGE TO PROPERTY EXCLUSIVE REMEDIE...

Страница 63: ...Appendix C GPNVS Status String Definitions All information provide herein is the proprietary property of Novus Power Products L L C The information included may be reproduced without the permission o...

Страница 64: ...Status String GPNVS 9 Frequency Deprecated 13 1 9 1 Status String GPNVS 9 Frequency Measurement Deprecated 13 1 9 2 Status String GPNVS 9 Frequency Measurement HS 14 1 10 Status String GPNVS 10 PPS S...

Страница 65: ...itoring will be set up to meet the following protocols These are designed to be standardized across different products and easy to port and use via serial to ethernet connections Many products will ha...

Страница 66: ...V Not Valid N N A 6 GPS 2 Lock Valid A Valid V Not Valid N N A 7 of Sats in View 1 Greater of GPS or GNSS count N N A 8 of Sats in View 2 Greater of GPS or GNSS count N N A 9 Channel Fault Byte 0x0000...

Страница 67: ...Date mmddyy 5 Channel 1 Vrms 0 00 to 3 30 V 6 Channel 2 Vrms 0 00 to 3 30 V 7 Channel 3 Vrms 0 00 to 3 30 V 8 Channel 4 Vrms 0 00 to 3 30 V 9 Channel 5 Vrms 0 00 to 3 30 V 10 Channel 6 Vrms 0 00 to 3...

Страница 68: ...ply 5 30 0 to 30 0 V 10 Power Supply 6 30 0 to 30 0 V 11 Power Supply 7 30 0 to 30 0 V 12 Power Supply 8 30 0 to 30 0 V 13 Built in Test BIT 0 Ok 1 Fail 14 Temperature C 40 to 99 15 NMEA Checksum XX x...

Страница 69: ...e mmddyy 5 Channel 9 Vrms 0 00 to 3 30 V 6 Channel 10 Vrms 0 00 to 3 30 V 7 Channel 11 Vrms 0 00 to 3 30 V 8 Channel 12 Vrms 0 00 to 3 30 V 9 Channel 13 Vrms 0 00 to 3 30 V 10 Channel 14 Vrms 0 00 to...

Страница 70: ...GPNVS 5 hhmmss ddmmyy nnn nn nn XX 1 2 3 4 5 6 7 8 Description Range 1 Identifier GPNVS 2 String ID 5 3 Time UTC hhmmss 4 Date mmddyy 5 Potentiometer Hex Value 000 to FFF 6 Fan PWM 0 to 90 7 Temperat...

Страница 71: ...dentifier GPNVS 2 String ID 6 3 Active PCB Assembly 0 or 1 4 GNSS Lock A Locked V Unlocked 5 Input Error 0 Ok 1 A Error 2 B error 6 Channel Status Word 0x0000 to 0xFFFF 7 Primary PS Status 0x00 to 0xF...

Страница 72: ...ium GPNVS 6 nnn 0x0000 nnn 0 1 XX 1 2 3 4 5 6 7 Description Range 1 Identifier GPNVS 2 String ID 6 3 Heat Sink Temperature 0 255 4 Heater Current Voltage 0x0000 0x0136 5 Measured Voltage in Heater 0 2...

Страница 73: ...hmmss 4 Date mmddyy 5 GPS Lock A Valid V Not Valid 6 of Sats in View 1 Greater of GPS or GNSS count N N A 7 Error Byte 0x00 to 0xFF 8 Freq Diff 999 last count clock cycles 9 PPS Diff 999 last count cl...

Страница 74: ...1 On 5 Event Enabled System 0 Events Disabled 1 Events Enabled 6 GPS Lock Achieved 0 No Lock 2 Locked or previously locked 7 Event Index 0 512 Current count of events in RAM 8 Event Errors RAM 0 9 Ev...

Страница 75: ...atus String GPNVS 9 Frequency Measurement Deprecated GPNVS 9 hhmmss ddmmyy n nnnnnnn nnn nnn nn XX 1 2 3 4 5 6 7 8 Description Range 1 Identifier GPNVS 2 String ID 9 3 Time UTC hhmmss 4 Date mmddyy 5...

Страница 76: ...iption Range 1 Identifier GPNVS 2 String ID 9 3 Frequency Loop Period 10000000 000 4 DAC Voltage Double 2 00000 5 Frequency per second 10000000 0 6 Loop Period 0 99 7 Antenna Current Mon 0 00 to 3 30V...

Страница 77: ...c PPS 1 GPS PPS 6 PPS Difference 250 ns 7 PPS Avg Difference 250 ns 8 PPS Avg Count 1 20 9 PPS Synch Threshold 1 250 10 PPS pull Cal Factor 0 1 to 10 0 11 PPS active Time Cal Factor 0 to 9 12 Frequenc...

Страница 78: ...Remaining 0 99999 s 4 Warmup Period Complete 0 not complete 1 complete 5 Holdover Time Elapsed 0 999999 s 6 Holdover Valid 0 not in spec 1 in spec 7 Frequency Valid 0 not valid 1 valid 8 PPS output c...

Страница 79: ...3 3 Priority Discipline Source 0 GNSS 1 10MHz input 2 Optical input 4 Current Discipline Source 0 GNSS 1 10MHz 2 Optical 3 Holdover 5 GNSS Lock 0 to 3 0 Unlocked 3 Fully Locked 6 RF Present 0 No RF so...

Страница 80: ...dentifier GPNVS 2 String ID 11 3 Rb Status 8 Heat Init 5 Laser Lock 0 Fully Locked 4 Rb Alarm 0 Ok n Alarm Indicator 5 Rb Mode 0x0000 to 0xffff 6 Rb Steer 0000 to 9999 7 Rb Disc Status 1 Disc Good 2 H...

Страница 81: ...ange 1 Identifier GPNVS 2 String ID 15 3 Rb Lock 0 Init No Lock 1 Fully Locked 4 Rb State n Integer state of Rb Discipline 5 Rb Status 0000 to FFFF 6 Rb Fine Tune 0000 to 9999 7 Rb Fine Tune Loop 0000...

Страница 82: ...4 Date mmddyy 5 Channel 17 Vrms 0 00 to 3 30 V 6 Channel 18 Vrms 0 00 to 3 30 V 7 Channel 19 Vrms 0 00 to 3 30 V 8 Channel 20 Vrms 0 00 to 3 30 V 9 Channel 21 Vrms 0 00 to 3 30 V 10 Channel 22 Vrms 0...

Страница 83: ...4 Date mmddyy 5 Channel 25 Vrms 0 00 to 3 30 V 6 Channel 26 Vrms 0 00 to 3 30 V 7 Channel 27 Vrms 0 00 to 3 30 V 8 Channel 28 Vrms 0 00 to 3 30 V 9 Channel 29 Vrms 0 00 to 3 30 V 10 Channel 30 Vrms 0...

Страница 84: ...er com 1 R Response String GPNVS R GPNVS R n response XX 1 2 3 4 5 Description Range 1 Identifier GPNVS 2 Response ID R 3 Command Success 1 Success 0 Fail 4 Response see example responses 5 NMEA Check...

Страница 85: ...17 Time UTC hhmmss 18 Date mmddyy 19 GPS Lock Valid A Valid V Not Valid 20 of Sats in View Greater of GPS or GNSS count 21 Channel Fault Byte 0x00 to 0x3F Hex OR d value 22 Power Supply Fault Byte 0x...

Страница 86: ...scription Range 14 Identifier GPNVS 15 String ID 2 16 Time UTC hhmmss 17 Date mmddyy 18 Channel 1 Vrms 0 00 to 6 60 V 19 Channel 2 Vrms 0 00 to 6 60 V 20 Channel 3 Vrms 0 00 to 6 60 V 21 Channel 4 Vrm...

Страница 87: ...0 Description Range 15 Identifier GPNVS 16 String ID 2 17 Time UTC hhmmss 18 Date mmddyy 19 5Vdc Power Supply opt 30 0 to 30 0 V 20 5Vdc Power Supply 30 0 to 30 0 V 21 10k Thermistor opt 0 00 to 3 30...

Страница 88: ...annel 14 Fault 0x1 14 Channel 15 Fault Channel Fault Bin Hex Value OR d Channel ID Channel Fault Bin 0x1 0 Channel 1 Fault External Fault The ND0100 has completed an internal amplifier gain test and b...

Страница 89: ...9 Channel 10 Fault 0x1 10 Channel 11 Fault 0x1 11 Channel 12 Fault 0x1 12 Channel 13 Fault 0x1 13 Channel 14 Fault 0x1 14 Channel 15 Fault Backup PCB Amp Status Hex Value OR d Channel ID Backup PCB Am...

Страница 90: ...0x1 5 Reserved 0x1 6 Reserved 0x1 7 Reserved Primary and Secondary Power Supply Status Hex Value OR d Status Message 0x1 0 PS 1 Fault 0x1 1 PS 2 Fault 0x1 2 PS 3 Fault 0x1 3 PS 4 Fault 0x1 4 PS 5 Fau...

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