Novus N4430-O-G User manual

Users manual
N4430-O-G
Revision #:
B
Date:
8-23-18
Page 1of 74
NR4430-O-G
GNSS Locked Reference with OCXO Holdover / AutoCal
All information provided herein is the property of Novus Power Products L.L.C. The
information included may be reproduced without the permission or prior approval of Novus
Power Products L.L.C. for the purpose of operating the equipment.

Users manual
N4430-O-G
Revision #:
B
Date:
8-23-18
Page 2of 74
Contents
1.0 Summary ..................................................................................................................... 4
1.1 Dimensions........................................................................................................................................5
1.2 Input/Output/Indicators ............................................................................................ 6
2.0 Controls and Indicators ............................................................................................... 7
2.1 GNSS Lock LED..................................................................................................................................7
2.2 Satellite Number Counter LED.............................................................................................................7
2.3 Status Good Signal (CMOS 3V3 Active High) ........................................................................................7
2.4 UART TX/RX ......................................................................................................................................7
2.5 Power connector detail .......................................................................................................................8
3.0 Inputs / Outputs ......................................................................................................... 8
3.1 GNSS Antenna (MCX) .........................................................................................................................9
3.2 PPS 1 / PPS 2 (MMCX)......................................................................................................................10
3.4 10MHz Sine .....................................................................................................................................12
3.5 Serial/UART/NMEA ...........................................................................................................................12
4.0 Typical Phase Noise ................................................................................................... 12
5.0 Built-in Test............................................................................................................... 13
6.0 Power ........................................................................................................................ 13
7.0 GNSS Function........................................................................................................... 13
8.0 Mechanical................................................................................................................. 15
9.0 Communication Specification .................................................................................... 16
Serial data output timing △4............................................................................................ 17
NMEA Sentence Format ................................................................................................... 18
Proprietary Sentence Format: ......................................................................................... 19
Standard NMEA Output Sentences .................................................................................. 20
GGA –Global Positioning System Fix Data Format: ..................................................................................21
GLL –Geographic Position - Latitude/Longitude △6................................................................................22
GNS –GNSS Fix Data Format: ................................................................................................................23
GSA –GNSS DOP and Active Satellites △4.............................................................................................25
GSV –GNSS Satellites in View △4 ...........................................................................................................26
RMC –Recommended Minimum Navigation Information△6 .......................................................................28
VTG –Course Over Ground and Ground Speed Format: ...........................................................................30
ZDA –Time & Date Format: ...................................................................................................................30
Proprietary NMEA Input Sentences ................................................................................. 31
GNSS –Satellite System Configuration △4△8 ...........................................................................................32
FIXMASK –Setting of Positioning and Satellite Mask △4 ...........................................................................34
PPS –Setting of PPS（Pulse per second）△4 Format: ..............................................................................36

Users manual
N4430-O-G
Revision #:
B
Date:
8-23-18
Page 3of 74
RESTART - Restart command △4 Format:................................................................................................38
TIME –Setting of time information △4 ....................................................................................................39
TIMEZONE –Local Zone Time △4 ...........................................................................................................41
SURVEY –Position Mode △1 Format:.......................................................................................................42
FREQ –Setting of GCLK FREQUENCY △2△7 Format:.................................................................................46
DEFLS –Setting of default leap second △4 △6 Format:.............................................................................47
TIMEALIGN –setting of time alignment △4 Format: .................................................................................48
Restriction: ...........................................................................................................................................49
FLASHBACKUP –Setting of backup in Flash △4 Format: ...........................................................................50
CROUT –Setting of CR Output Format:...................................................................................................51
CFG –Setting of Application Software............................................................................. 52
NMEAOUT –Standard NMEA Output △9 ..................................................................................................52
UART1 –Serial Communication Port Format: ...........................................................................................52
SYS –PVT System .................................................................................................................................54
GPIO –General Purpose Input/output Format: ........................................................................................54
Proprietary NMEA Output Sentences............................................................................... 55
ACK –Output the Command Reception Check Format:.............................................................................55
CR –eRide GNSS Core Library Interface ......................................................................... 56
CRW(TPS1) –Output Time Transfer Info per Second (Date and leap second) △4△5 Format:.......................56
CRX(TPS2) –Output Time Transfer Info per Second (PPS) △4 Format:......................................................59
CRY(TPS3) –Output Time Transfer Info per Second (Survey & TRAIM) Format: ........................................61
CRZ (TPS4) –Output Time Transfer Info per Second (FREQUENCY) △3 Format: ........................................63
CRM –Measurement Data of GPS ...........................................................................................................65
CRN –Navigation Data...........................................................................................................................66
SYS –Answer of PVT System .................................................................................................................67
GPIO- General Purpose Input/output Format: ..........................................................................................67
FIXSESSION- Fix Session △1 Format: ......................................................................................................68
ANTSEL- Antenna selecting △1 Format: ...................................................................................................68
BBRAM - Battery Backup Random Access Memory △1 Format: ..................................................................69
MSG –Event Driven Message △1 Format:................................................................................................69
Backup of the Receiver Parameters (for BBRAM) △4 ....................................................... 70
Technical Specification.................................................................................................... 72

Users manual
N4430-O-G
Revision #:
B
Date:
8-23-18
Page 4of 74
1.0 Summary
The NR4430-GNSS is a GNSS locked 10 MHz Frequency Reference with auto-
calibration.
Compact GNSS locked reference designed to be easily integrated into your system
to provide precision 10 MHz, PPS and NMEA for master timing. The unit features a
26 channel high-sensitivity, high-accuracy Multi-GNSS receiver. Supports TRAIM,
GPS, GLONASS, QZSS, SBAS, Active Anti-Jamming and Advanced Multipath
Mitigation Functions. Digital control loop provides low close in phase noise and
pulse to pulse jitter on the PPS of less than 1 ns. Auto-calibration stores the most
recent compensation coefficients dramatically minimizing long-term drift. A single 5
Vdc power supply simplifies system integration. Status signals alert the system to
BIT failures or loss of GNSS signal.
The signal source is a GNSS disciplined OCXO, actively controlled by complex
algorithm designed to minimize frequency error and PPS jitter. The 10 MHz sine
output is sourced from an intrinsically low jitter voltage-controlled crystal oscillator.
The calibration feature continually monitors the correction coefficients developed
through GNSS timing information. These are sampled multiple times per day and
stored in non-volatile memory and in the event of a GNSS loss, the saved
coefficients are applied to the OCXO. This effectively eliminates long-term crystal
drift.
There is an extensive built-in test loop that drives two LEDs and a single buffered
status bit signal from the 10-pin connector offering the ability to remotely monitor for
fault or loss of GNSS lock. There is also a GNSS lock status signal (and LED), PPS
and a serial port to provide access to NMEA time stamp data.
All inputs and outputs are electrostatic discharge protected. Any output can be
shorted indefinitely with no permanent damage to the unit.

Users manual
N4430-O-G
Revision #:
B
Date:
8-23-18
Page 5of 74
1.1 Dimensions
Con 14 is a 10 pin header (unpopulated) with 0.100” spacing:
- Pin 1 at x=2951 mils, y=1152 mils.
- Pin 10 at x=3047 mils, y = 750 mils

Users manual
N4430-O-G
Revision #:
B
Date:
8-23-18
Page 6of 74
1.2 Input/Output/Indicators
1
10MHz Sine Out (MCX) 1Vrms
2
PPS 1 Out (MMCX) 3V3 CMOS
3
PPS 2 Out (MMCX) 3V3 CMOS
4
Satellited LED
5
Antenna Input (MMCX)
6
Lock LED
7
Power/Alert/UART/PPS
8
Power 5Vdc

Users manual
N4430-O-G
Revision #:
B
Date:
8-23-18
Page 7of 74
2.0 Controls and Indicators
2.1 GNSS Lock LED
This is normally green when GNSS locked and the loop is locked. The LED
flashes green twice when the GPS is not locked, once when the GPS is locked,
and the loop is in warmup / tracking.
2.2 Satellite Number Counter LED
This LED flashes the number of satellites currently acquired. If the unit will not
lock or takes a long-time to lock - monitoring this LED could help troubleshoot
the problem. If only a few satellites can be acquired, the antenna may need to
be confirmed to make sure it has a clear view of the sky.
2.3 Status Good Signal (CMOS 3V3 Active High)
The status signal is available from the power/serial 10-pin connector. A logic
level low indicates the unit has failed self-test. Logic high (3V3) indicates
passed self test.
2.4 UART TX/RX
The UART TX/RX provides NMEA 0183 strings as well as proprietary status
strings, which allow monitoring of the health, performance and frequency
measurement of the unit. The format is serial 3V3, with default baudrate of
38400, 1 stop bit, no parity.

Users manual
N4430-O-G
Revision #:
B
Date:
8-23-18
Page 8of 74
2.5 Power connector detail
1
Optional PPS (CMOS)
2
UART TX (CMOS)
3
GND
4
Alert (CMOS)
5
GND
6
N/C
7
UART RX (CMOS)
8
5Vdc
9
5Vdc
10
GND
3.0 Inputs / Outputs
Each 10MHz or PPS output is fault and electrostatic discharge protected. Each
output is independent and any output can be faulted for an indefinite period of time
with no permanent damage.

Users manual
N4430-O-G
Revision #:
B
Date:
8-23-18
Page 9of 74
3.1 GNSS Antenna (MCX)
MCX connects to the GNSS ant - provides 3.5VDC/45ma max.
Antenna specifications should meet the following characteristics:
Operating Frequency: 1575.42 MHz, +/-2 MHz
Input Impedances: 50 Ohm
VSWR: 1.5 (typical)
Bandwidth: 25 MHz (typical) +/- 3dB points
Polarization: Right Hand Circular
Power Requirements: 5 +/- 0.25 VDC
Power Consumption: 26mA @ 5 VDC (typical)
Novus NA103 Novus NA106

Users manual
N4430-O-G
Revision #:
B
Date:
8-23-18
Page 10 of 74
3.2 PPS 1 / PPS 2 (MMCX)
MMCX - one pulse per second - 3.3 VDC CMOS - PPS can also be made available
on pin 1 of the power/serial connector.
There are two PPS signals available- Radio PPS and Synthesized PPS. The radio
PPS comes directly from the GNSS receiver. It is accurate to 1 sigma at 15 ns. It
has a jitter level that is on the order of 6 ns pulse to pulse. The Synthesized PPS is
derived from the crystal and has a pulse to pulse jitter level of below 1 ns after 30
mins at stable temperature.
The control loop modulates the OCXO to keep the Synthesized PPS to within 50 ns
of the Radio PPS. There are commands sent thru the serial port that allow the user
to configure the PPS output. The default output is synthesized PPS, disciplined to
the GNSS PPS. Selecting between GNSS PPS or Synthesized PPS will affect both
PPS outputs.
PPS from radio