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Novus NR2306-O-G User Manual

10 mhz six channel ultra low noise gnss locked frequency reference
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10 MHz Six Channel Ultra Low Noise GNSS Locked
All information provided herein is the property of Novus Power Products LLC. The information
included may be reproduced without the permission of Novus Power Products LLC for the
purpose of operating the Novus equipment.
Page | 1
USERS MANUAL
REVISION
DATE
NR2306-O-G
Frequency Reference
NR2306-O/G
A
3-8-18

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Summary of Contents for Novus NR2306-O-G

  • Page 1 10 MHz Six Channel Ultra Low Noise GNSS Locked Frequency Reference All information provided herein is the property of Novus Power Products LLC. The information included may be reproduced without the permission of Novus Power Products LLC for the purpose of operating the Novus equipment.

  • Page 2: Table Of Contents

    USERS MANUAL NR2306-O/G REVISION DATE 3-8-18 Contents 1.0 Overview ........................3 2.0 Controls and Indicators – Front Panel................6 2.1 GNSS Status ........................7 2.2 GNSS Detailed Status ......................7 2.3 Channel Status ........................7 2.4 Status LEDs ........................8 2.5 Alert Threshold ........................

  • Page 3: Overview

    USERS MANUAL NR2306-O/G REVISION DATE 3-8-18 1.0 Overview The NR2306 is one of our most versatile and featured references. The instrument starts with an ultra-low phase noise OCXO. The OCXO can be locked to either the GNSS, an external PPS, external 10 MHz sine or an external 1300nm fiber optic 10 MHz source.
  • Page 4 USERS MANUAL NR2306-O/G REVISION DATE 3-8-18 The typical phase noise is indicated below. 10 MHz Sine - Primary Output Offset Frequency (Hz) Typical (dBc / Hz) -140 -152 1000 -160 10000 -165 The disciplined OCXO drives a synthesizer to create a PPS from the OCXO to dramatically reduce PPS jitter.
  • Page 5 USERS MANUAL NR2306-O/G REVISION DATE 3-8-18 A front panel display, and pushbuttons allow the user to monitor and control the instrument locally. A RS232 port allows for local control and monitoring and an Ethernet port is used for remote control and monitoring. The unit supports SNMP V04 for remote access and control.

  • Page 6: Controls And Indicators - Front Panel

    USERS MANUAL NR2306-O/G REVISION DATE 3-8-18 Each output is monitored and transient and fault protected. Output amplitude is measured and available via the RS232 port or optional Internet port. There is also a status relay that is normally closed that will open if the unit fails self-test. 2.0 Controls and Indicators –...

  • Page 7: Gnss Status

    USERS MANUAL NR2306-O/G REVISION DATE 3-8-18 2.1 GNSS Status On power-up, the NR2306-O/G will display the Time and Date as well as the current status of both GNSS receivers (if a dual-time base option was ordered). GNSS: The GNSS status indication allows the user to observe the Lock status of the receivers, and the number of GNSS satellites in view.

  • Page 8: Status Leds

    USERS MANUAL NR2306-O/G REVISION DATE 3-8-18 The range of acceptable Channel Amplitude can be narrowed around a connected balanced line, so that a Channel Status below the Alert Threshold indicates a shorted line, while a Channel Status above the Alert Threshold window indicates a potential disconnected cable.

  • Page 9: Alert Threshold

    USERS MANUAL NR2306-O/G REVISION DATE 3-8-18 Fault LED: The Fault LED will illuminate flashing RED to indicate a channel fault, when any single channel is outside the user-defined threshold. 2.5 Alert Threshold The Alert Threshold screen allows the user to adjust the tolerance from the Reference Voltage which, if exceeded in either direction, the output channels will report a fault status.
  • Page 10 USERS MANUAL NR2306-O/G REVISION DATE 3-8-18 The Alert Threshold can be optimized so that a channel short or an impedance change will cause an Alert. Example: The output of Channel 1 is connected to a high impedance input and reports 1.25Vrms at the output.

  • Page 11: Latch Channel Values

    USERS MANUAL NR2306-O/G REVISION DATE 3-8-18 The Channel 2 Alert will report when: The Channel 2 output is higher than 1.08Vrms The Channel 2 output is lower than 0.72Vrms To adjust the Alert Threshold from the front panel, hold the NEXT and SELECT buttons down simultaneously for two seconds.
  • Page 12 USERS MANUAL NR2306-O/G REVISION DATE 3-8-18 The serial data timing is for the next rising edge of the PPS pulse. The PPS from the active GPS is monitored to verify output is active. The PPS output can be disabled or enabled, as well as set to AUTO, which disables the PPS during a user- defined warm-up period and after a user-defined holdover period has been exceeded.

  • Page 13: Gps Select (Dual Time Base Feature)

    USERS MANUAL NR2306-O/G REVISION DATE 3-8-18 If the GPS has remained unlocked for a period which exceeds the user-defined holdover period, the PPS status will indicate HLDOVR ERR. Status of the Warmup and Holdover counters can also be monitored from the $GPNVS string 11, which includes Warmup Complete and Holdover Valid fields, as well as frequency valid fields.

  • Page 14: Save Configuration

    USERS MANUAL NR2306-O/G REVISION DATE 3-8-18 There are four settings, and these are the same as the serial command $GPS: Serial Setting Description Command GPS 1 GPS 1 is used as output regardless of lock status or error $GPS=0 GPS 2 GPS 2 is used as output regardless of lock status or error $GPS=1 AUTO (1)

  • Page 15: Utc Mode

    USERS MANUAL NR2306-O/G REVISION DATE 3-8-18 Press SELECT to advance to the System Fault screen. The System Fault screen indicates any failures in the primary system or the redundant back-up system. All internal power supplies are monitored (24V, +8V, -8V, 5V) on both the primary and back-up systems.

  • Page 16: Power Switch

    USERS MANUAL NR2306-O/G REVISION DATE 3-8-18 Adjusting the GMT offset will affect the displayed date. As the hour moves across the International Dateline, the displayed date will reflect the date in the selected time zone, and not necessarily the GMT date. 2.13 Power Switch The front or rear panel Power Switch controls AC Power input to the unit.

  • Page 17: Dc Input

    USERS MANUAL NR2306-O/G REVISION DATE 3-8-18 3.3 DC Input The DC input connector is a 3 pin Amphenol circular connector, P/N DL3102A10SL-3P. The mating connector is available as P/N DL3106A10SL-3S. The default DC input voltage is 24Vdc. Custom voltage ranges can be provided from - 60Vdc to +60Vdc.
  • Page 18 USERS MANUAL NR2306-O/G REVISION DATE 3-8-18 TTFF (Time to First Fix) Hot Start: <5 sec (@-130 dBm) Warm Start: 35 sec (@-130 dBm) Cold Start: 40 sec (@-130 dBm) ・Active Anti-Jamming ・Advanced Multipath Mitigation The receiver needs at least four satellite vehicles (SVs) visible to obtain an accurate 3-D position fix.

  • Page 19: Antenna

    Antenna – SMA SMA female antenna connection provides internal 3.5VDC power at <40mA max. The Novus NA103 pole mount antennas or the Novus NA106 magnetic mount antenna are recommended for optimal performance. The receiver and companion elements generate the PPS and NMEA serial link.

  • Page 20: Programming Guide (Rs232 Port)

    USERS MANUAL NR2306-O/G REVISION DATE 3-8-18 Typical Antenna Specs: 1574 – 1607 MHz Frequency Band Antenna Gain 2 dBic @ 90° Amplifier Gain @ 3.0Vdc: 26dB (typ) Polarization RHCP Out-of-band Rejection >60dBc @ f0 ± 50MHz 50Ω Impedance VSWR 2.0 Max DC Input 2.8V - 6V Noise Figure...

  • Page 21: Rs232 / Status / Command

    USERS MANUAL NR2306-O/G REVISION DATE 3-8-18 6.1 RS232 / Status / Command The RS232 port (socket) provides the main NMEA-0183 data output, as well as input of command variables and flash settings. The NMEA output is a combined structure of the GNSS receiver output and the onboard processors status output.

  • Page 22: Specifications

    USERS MANUAL NR2306-O/G REVISION DATE 3-8-18 Specifications Performance 10MHz sine 4 ±0.5 dBm ,50 Ohm - BNC Harmonics Less than -30 dBc First year frequency stability ±50 ppb (long-term unlocked) Temperature stability ±10 ppb (long-term unlocked) Yearly aging ±50ppb (long-term unlocked) Phase noise -85 @1 Hz -140@10 Hz...

  • Page 23: Limited Hardware Warranty

    Should Novus be unable to repair or replace the product within a reasonable amount of time, the customer’s alternate remedy shall be a refund of the purchase price upon return of the product to Novus. The liability of NOVUS under this warranty is limited to replacing, repairing or issuing a credit, at its option, for any such item returned by Buyer under the terms of this warranty.

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