Novus NR7020-RO User manual

DATA SHEET NUMBER
NR7020-RO
REVISION
B
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)

DATA SHEET NUMBER
NR7020-RO
REVISION
B
DATE
040522
Page #:
2 of 4
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Accuracy at Shipment
<0.5E-9
Monthly Aging
<2E-11 after 3 months of operation
Yearly Aging
<1E-9 after 3 months operation (unlocked)
Locked
<5 E-11
Harmonic Distortion
< -30 dBc
Alert
BITE, LED, Serial messaging
Rubidium Atomic
Frequency Standard:
Accuracy at shipment
+/-5.0E-10
Warm-up time
<10 minutes
Time of lock
<5 min -130 dBm
Time to achieve accuracy
<1E-9<6 minutes
Aging - monthly
<5E-11
Aging - yearly
<1.0E-9
Temperature Stability
<1 E-9
Time for valid 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
<-135 <-155dBc
10000Hz
135 <-160dBc
PPS
Amplitude for 1PPS
3.3 Vdc CMOS (5 Vdc option)
Pulse width for 1PPS
Programmable 0.1 to 500ms in 0.1ms steps
Rise time for 1PPS
<1 ns
Jitter
Two PPS modes- GNSS-PPS and stabilized PPS- GNSS-PPS < 6ns
Stabilized PPS < 1 ns,
Connector
SMA
Load Impedance
50 Ohm
Location
rear
GNSS receiver
GPS L1 C/A, GLONASS L1OF, QZSS L1 C/A, SBAS L1 C/A
(Ready): Galileo E1B/E1C, QZSS L1S
Channels
26 channels (GPS, GLONASS, QZSS, SBAS)
Sensitivity
GPS
Tracking: -161 dBm
Hot Start: -161 dBm
Warm Start: -147 dBm
Cold Start: -147 dBm

DATA SHEET NUMBER
NR7020-RO
REVISION
B
DATE
040522
Page #:
3 of 4
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Reacquisition: -161 dBm
GLONASS
Tracking: -157 dBm
Hot Start: -157 dBm
Warm Start: -143 dBm
Cold Start: -143 dBm
Reacquisition: -157 dBm
With Novus recommended antenna
Antenna with LNA
Antenna power
3.5 Vdc, < 35 ma (on center conductor) (factory configurable to 5 Vdc)
Frequency
1574-1607 MHz
Nominal Gain
2 dBic
Amplifier gain
26 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
Selectable 9600, 19200, 38400, 57600 or 115200 bps
Main Power
Size
5 x 3.4 x 1.33 inches
DC input
5Vdc 3 amps peak 1.5 amps steady state
Power
<7 W ( steady state < 4 W)
Warranty
1 year plus 3 year optional extended warranty from date of shipment
Environmental and Mechanical
Operating Temperature
-20 to 55°C non-condensing (optional extended temperature range)
Storage Temperature
-40 to 70°C
Weight
<0.5 lbs

DATA SHEET NUMBER
NR7020-RO
REVISION
B
DATE
040522
Page #:
4 of 4
www.novuspower.com
This document is copyright © April 6, 2022 Novus 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 other
warranties or conditions including implied warranties and conditions of merchantability or
fitness for a particular purpose.

Users manual
Appendix A
Revision #:
A
Date:
07-14-15
Page 1of 58
Users Manual Appendix A
Appendix A
GPS/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 permission of Novus
Power Products L.L.C. without prior approval for purpose of operating the equipment.

Users manual
Appendix A
Revision #:
A
Date:
07-14-15
Page 2of 58
Table of Contents:
1COMMUNICATION SPECIFICATION ......................................................................................................................... 4
2SERIAL DATA OUTPUT TIMING △4........................................................................................................................... 5
3NMEA SENTENCE FORMAT ..................................................................................................................................... 6
4PROPRIETARY SENTENCE FORMAT: ........................................................................................................................ 7
5STANDARD NMEA OUTPUT SENTENCES.................................................................................................................. 8
GGA –GLOBAL POSITIONING SYSTEM FIX DATA FORMAT:.............................................................................................................. 9
GLL –GEOGRAPHIC POSITION -LATITUDE/LONGITUDE △6 ........................................................................................................ 10
GNS –GNSS FIX DATA FORMAT: ............................................................................................................................................ 11
GSA –GNSS DOP AND ACTIVE SATELLITES △4 ...................................................................................................................... 12
GSV –GNSS SATELLITES IN VIEW △4 ....................................................................................................................................... 13
RMC –RECOMMENDED MINIMUM NAVIGATION INFORMATION△6 ............................................................................................... 15
VTG –COURSE OVER GROUND AND GROUND SPEED FORMAT: ..................................................................................................... 17
ZDA –TIME &DATE FORMAT:................................................................................................................................................ 17
6PROPRIETARY 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）△4FORMAT: ....................................................................................................... 22
RESTART -RESTART COMMAND △4FORMAT: ........................................................................................................................... 24
TIME –SETTING OF TIME INFORMATION △4 .............................................................................................................................. 25
TIMEZONE –LOCAL ZONE TIME △4........................................................................................................................................ 26
SURVEY –POSITION MODE △1FORMAT:................................................................................................................................. 27
FREQ –SETTING OF GCLK FREQUENCY △2△7FORMAT:.......................................................................................................... 31
DEFLS –SETTING OF DEFAULT LEAP SECOND △4△6FORMAT:....................................................................................................... 32
TIMEALIGN –SETTING OF TIME ALIGNMENT △4FORMAT:........................................................................................................... 33
RESTRICTION:........................................................................................................................................................................ 34
FLASHBACKUP –SETTING OF BACKUP IN FLASH △4FORMAT: ..................................................................................................... 35
CROUT –SETTING OF CR OUTPUT FORMAT: ............................................................................................................................. 36
7CFG –SETTING OF APPLICATION SOFTWARE........................................................................................................ 37
NMEAOUT –STANDARD NMEA OUTPUT △9 .......................................................................................................................... 37
UART1 –SERIAL COMMUNICATIONPORT FORMAT:.................................................................................................................... 37
SYS –PVT SYSTEM ............................................................................................................................................................... 39
GPIO –GENERAL PURPOSE INPUT/OUTPUT FORMAT:.................................................................................................................. 39

Users manual
Appendix A
Revision #:
A
Date:
07-14-15
Page 3of 58
8PROPRIETARY NMEA OUTPUT SENTENCES ........................................................................................................... 40
ACK –OUTPUT THE COMMAND RECEPTION CHECK FORMAT:........................................................................................................ 40
9CR –ERIDE GNSS CORE LIBRARY INTERFACE ...................................................................................................... 41
CRW(TPS1) –OUTPUT TIME TRANSFER INFO PER SECOND (DATE AND LEAP SECOND)△4△5FORMAT: ................................................ 41
CRX(TPS2) –OUTPUT TIME TRANSFER INFO PER SECOND (PPS)△4FORMAT: ................................................................................ 44
CRY(TPS3) –OUTPUT TIME TRANSFER INFO PER SECOND (SURVEY &TRAIM) FORMAT: .................................................................. 46
CRZ (TPS4) –OUTPUT TIME TRANSFER INFO PER SECOND (FREQUENCY)△3FORMAT:.................................................................. 48
CRM –MEASUREMENT DATA OF GPS ...................................................................................................................................... 50
CRN –NAVIGATION DATA ...................................................................................................................................................... 51
SYS –ANSWER OF PVT SYSTEM............................................................................................................................................... 52
GPIO- GENERAL PURPOSE INPUT/OUTPUT FORMAT:.................................................................................................................... 52
FIXSESSION- FIX SESSION △1FORMAT: ................................................................................................................................... 53
ANTSEL- ANTENNA SELECTING △1FORMAT:.............................................................................................................................. 53
BBRAM -BATTERY BACKUP RANDOM ACCESS MEMORY △1FORMAT: ........................................................................................... 54
MSG –EVENT DRIVEN MESSAGE △1FORMAT: .......................................................................................................................... 54
10 BACKUP OF THE RECEIVER PARAMETERS (FOR BBRAM) △4 .................................................................................. 55

Users manual
Appendix A
Revision #:
A
Date:
07-14-15
Page 4of 58
1Communication Specification
Signal Lines used: TXD, RXD
Flow Control: None
System: Full Duplex Asynchronous
Speed: Configurable, Default 38400 bps (*1)
Start Bit: 1 bit
Data Length: 8 bits
Stop Bit: 1 bit
Parity Bit: None
Data Output Interval: 1 second
Character Codes used: NMEA-0183 Ver.4.10 data based
ASCII code (*2) Protocol: Input 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 bps.
Please refer to section “UART1 –Serial Communication Port” for how to
configure the communication speed. 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 second.
Note 2: ”NMEA 0183 STANDARD FOR INTERFACING MARINE ELECTRONIC DEVICES
Version 4.10” (NATIONAL MARINE ELECTRONICS ASSOCIATION, June, 2012)

Users manual
Appendix A
Revision #:
A
Date:
07-14-15
Page 5of 58
2Serial 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 data indicates next PPS output timing.
PPS(t-1) PPS(t) PPS(t+1)

Users manual
Appendix A
Revision #:
A
Date:
07-14-15
Page 6of 58
3NMEA Sentence Format
13.1 Standard Sentence
Format:
5 bytes
Field
Description
$
Start-of Sentence marker
<address field>
5-byte fixed length. First 2 bytes represent a talker ID, and the
remaining 3 bytes do a sentence formatter.
All output sentences must begin with a “$” followed by a TalkerID.
The relevant Talker IDs are GP for GPS, GN for GNSS, GL for
GLONASS and GA for Galileo.
For the sentences received from external equipment, the GT-87
accepts any talker ID. Talker ID “XX” found on the succeeding pages
is a wildcard meaning “any valid talker ID”.
<data field>
Variable or fixed-length fields preceded by delimiter “,”(comma).
Comma(s) are required even when valid field data are not available
i.e. null fields. Ex. “,,,,,”
In a numeric field with fixed field length, fill unused leading digits
with zeroes.
*<checksum field>
8 bits data between “$” and “*” (excluding “$” and “*”) are XORed,
and the resultant value is converted to 2bytes of hexadecimal
letters. Note that two hexadecimal letters must be preceded by“*”,
and delimiter “,” is not required before *<checksum>.
All output sentences have checksum.
For input sentences, the resultant value is checked and if it is not
correct, the sentence is treated invalid.
<CR><LF>
End-of-Sentence marker
$
<address field>
,
<data field>
…
*<checksum field>
<CR>
<LF>