Frequency Electronics, Inc. FEI-Zyfer, Inc.
GPS Time and Frequency Systems

NanoSync IV  Model 424

Military-Grade Position, Navigation, Timing (PNT) & Frequency Reference System with SAASM GPS


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System Features:

High Performance Position
    & Navigation Engine

Precise Time & Frequency

COTS for Military

Compact, Rugged Design

Low Power - Less than
    20W Steady-State
Wide Operating
    Temperature Range

JASA V3 Annex 1
    TFNG Compliant

No Maintenance Required



  The NanoSync IV is a small form factor GPS Position, Navigation, Time (PNT) and Frequency reference system that provides multiple reference outputs and includes support for NTP & PTPv2 IEEE 1588-2008. The NanoSync IV has a Rubidium oscillator and can be equipped with a SAASM receiver (Rockwell-Collins MPE-S GB-GRAM or Trimble Force 22E MRU) for military users. The NanoSync IV is packaged in a small, rugged enclosure ideally suited for embedded electronic warfare applications.

The NanoSync IV has been demonstrated to be compliant to the Joint Airborne SIGINT Architecture (JASA) Version 3.0, Annex 1, for Time, Frequency, Navigation and Geodesy (TFNG), making it suitable for Electronic Warfare (EW) COMINT and ELINT applications in fixed site, airborne and shipboard environments.

NanoSync IV incorporates proven features designed into all FEI-Zyfer products, including exceptional holdover performance when GPS signals are lost or degraded. This assures continued system operation as a time and frequency reference. The NanoSync IV can be monitored and controlled through an RS-232 port using FEI-Zyfer’s Serial Communication Protocol and via the 10/100Base-TX RJ-45 Ethernet port.

As with all FEI-Zyfer time and frequency products, the NanoSync IV incorporates advanced, proprietary learning algorithms that compensate for external temperature changes and aging characteristics of the oscillator while operating in holdover. This FEI-Zyfer feature ensures accuracy and consistent performance throughout the specified operating temperature range.



NanoSync IV - Front Panel


NanoSync IV SAASM Front Panel


Status Indicator LEDs, Key Load & PLGR/DAGR connectors, Zeroize switch


 NanoSync IV - Side Panel


NanoSync IV


10 MHz (2x) - 1 PPS (2x) - Time Code - RJ-45 Ethernet - Antenna Input - Status, Control & Power



Antennas and Accessories
   Output Specifications  
  10 MHz Output:  
 Waveform:  Sine wave, AC coupled
 Connector:  (2) SMA Female
 Amplitude:  13 dBm +3/-1 into 50 Ω
 Harmonic Distortion:   -50 dBc
 Non-Harmonic Distortion:  -60 dBc
   Frequency Accuracy:  
 Locked to GPS:  ≤ 1E-12 (24 hour average)
 Holdover (with FE-5680B Rb) (a):  ≤ 7.5E-11 at 24 hours with 10 C  temperature change.
   Short Term Stability (Allan Deviation, typical):  
 1 Second:  ≤ 3E-11
 10 Seconds:  ≤ 1E-11
 100 Second:  ≤ 3E-12
  Phase Noise:  
 10 Hz:  ≤ -100 dBc/Hz  
 100 Hz:  ≤ -125 dBc/Hz  
 1 kHz:  ≤ -145 dBc/Hz  
  1 PPS Output (Pulse, Rising Edge on-time) (b):  
 Connector:  (2) SMA Female
 Drive Level:  TTL into 50 Ω
 Pulse Width:  2 ms w/ ≤ 20 ns Rise Time
 Synchronization:  Rising edge on-time
 1PPS Jitter:  ≤ 5 ns 2σ (95 %)
  1 PPS Time Accuracy:  
 Locked to GPS:  < 25 ns 2σ (95 %) to UTC
 Holdover (with FE-5680B Rb) (a):  ≤ 4.3 s @ 24 hours after 48 hours locked operation
  Time Code Output Options (User Programmable):  
 Connector:  (1) SMA Female
 BCD:  24b or 40b
 HaveQuick:  HaveQuick 2 (STANAG 4246)
   PTTI HaveQuick (ICD-GPS-060)
   Extended HaveQuick (STANAG 4430)
 IRIG:  B02x (x=2,3,6,7)
   Status & Control Ports  
  Serial Port:  
 Signal Levels:  RS-232C
 Connector:  (1) DE-9 (9 pin D-sub), Female
 Baud Rate:  19200 Fixed - 1 Start Bit, 8 Data Bits, 1 Stop Bit, No Parity
 Protocol:  FEI-Zyfer Serial Comm Protocol
  Ethernet Port:  
 Ethernet Type:  10/100Base-TX
 Connector:  RJ-45
 Configuration:  IPv4, IPv6 address, netmask & gateway user-selectable
 Compatibility:  TCP/IP, Ethernet ver. 2.0 / IEEE 802.3, TELNET & SSH,
   SNMP (v1, v2c, v3)
  Timing & Synchronization Protocols:  
 NTP v2, v3, v4 & SNTP v4:  
 NTP Server Performance:  Stratum 1
 Client Sync Accuracy:  1 - 10 ms (typical)
 NTP Requests Per Second:  ≥ 100
 PTPv2 Grandmaster Performance:  Packet throughput > 100 Delay Requests per second
   SAASM GPS Receiver Options (c)  
  Trimble Force 22E (MRU) GRAM SAASM GPS Receiver For Use in Man-Portable through
        High Dynamic Environments:
 Velocity (High Dynamic Limit):  Up to 400 meters/second
 Acceleration (High Dynamic Limit):  Up to 40 meters/second2
 Jerk (High Dynamic Limit):  Up to 4 meters/second3
  All-in-view 24 Channel Receiver, with continuous independent tracking:  
 Simultaneous L1 (C/A, P(Y)) and L2 (P(Y)) Dual Frequency Tracking
 Receiver Interface Protocols:  ICD-TNL-153C, ICD-TNL-167 SHCI, NMEA 0183 v3.2
  Time Accuracy:  
 UTC(USNO):  ≤ 100 ns 1σ (68.3 %)
 GPS Time:  ≤ 40 ns 2σ (95.5 %)
  Acquisition Time / TTFF:  
 Hot Start:  ≤ 10 seconds
 Warm Start:  ≤ 60 seconds
  Position & Velocity Accuracy (in State 5, L1 & L2, WAGE enabled & within  operating parameters:  
 SDGPS:  ≤ 2 meters CEP
 WAGE:  ≤ 4 meters CEP
 Velocity (High Dynamic Environment):  0.1 meters/second (RMS)
  Rockwell Collins MPE-S GB-GRAM SAASM GPS Receiver For Use in Man-Portable, Surface Vehicle
        or Low Dynamic Environments:
 Velocity (Surface Vehicle Limit):  Up to 25 meters/second
 Acceleration (Surface Vehicle Limit):  Up to 3 meters/second2
 Jerk (Surface Vehicle Limit):  Up to 2 meters/second3
  All-in-view 12 Channel Receiver, with continuous independent tracking:  
 Simultaneous L1 (C/A, P(Y)) and L2 (P(Y)) Dual Frequency Tracking
 Receiver Interface Protocols:  ICD-TNL-153C, NMEA 0183 v3.2
 RAM/FLASH and FLASH/FLASH versions of the MPE-S available and supported
  Time Accuracy:  
 UTC(USNO):  ≤ 200 ns 2σ (95.5 %)
 GPS Time:  ≤ 52 ns 2σ (95.5 %)
  Acquisition Time / TTFF:  
 Hot Start:  ≤ 10 seconds
 Warm Start:  ≤ 90 seconds
  Position & Velocity Accuracy (in State 5, L1 & L2, WAGE enabled & within  operating parameters:  
 SDGPS:  ≤ 2 meters CEP
 WAGE:  ≤ 4 meters CEP
 Velocity (Surface Vehicle):  Better than 4.0 meters/second (3D, 2σ)
  Key Load Interface:  
 Electrical Interface is per IS-GPS-154C and IS-GPS-164
 Communication Protocol is per DS-102
  PLGR/DAGR Interface:  
 Electrical Interface is per IS-GPS-154C and IS-GPS-164 (RS-232 & 1 PPS I/O supported)
 Serial Interface Protocol is per IS-GPS-153C
  GPS Antenna Interface:  
 Power:  5 VDC @ 100 mA
 Connector Type:  SMA Female
 Input Gain Required:  + 10 dB
   Input Voltage / Power Consumption  
 Standard Input:  +24 VDC (18 V to 28 VDC, externally regulated)
 Warm-Up:  40 W maximum @ 25 C
 Warm-Up Time:  ≤ 10 minutes
 Steady State:  20 W maximum @ 25 C
 Isolation:  None, input return connected to chassis/signal ground
 Optional: 704A / 1275 D Compliant  +15 VDC to +33 VDC
 Warm-Up:  50 W maximum @ 25 C
 Warm-Up Time:  ≤ 10 minutes
 Steady State:  30 W maximum @ 25 C
   Chassis Physical Dimensions  
 Height:  89 mm (3.50", side-mount)
 Width:  102 mm (4.02" excluding I/O connectors)
 Depth:  211 mm (8.27" excluding LED's and/or SAASM connectors)
 Weight:  < 2.2 kg (4.9 lbs.)
 Operating Temperature:  -20 °C to 50 °C (@ baseplate)
 Storage  Temperature:  -40 °C to +100 °C
 Temperature Rate of Change:  10 C/Hour maximum
 Relative Humidity:  5 % to 95 %, non-condensing
 Altitude, Operating:  0 to 35000 feet
 Altitude, Storage:  0 to 40000 feet
(a) After 48 hours of GPS locked operation, fixed antenna location and antenna delays entered.
(b) 1 PPS output can be disabled until GPS lock is achieved and time offset error is less than a user programmable amount.
(c) U.S. Government policy restricts the sale of Precise Positioning Service (PPS) equipment to those
authorized by the U.S. Department of Defense. Non-U.S. authorized users must purchase PPS equipment
through the Foreign Military Sales (FMS) process.

Product specifications subject to change without notice.


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