GNSS Disciplined Oscillators

VIAVI’s atomic class GNSS/GPSDO products provide top-tier Allan Deviation (ADEV) and ultra-low phase noise with Rubidium or enhanced CSAC and OCXO post-filtering.

Applications

• Reference clocks for radar front-ends and satellite communications
• High-end test equipment and calibration labs
• Time standards for scientific research and observatories
• GNSS-denied long-holdover deployments
• Defense systems requiring ultra-stable time/frequency

LN Rubidium

Rubidium Vapor Cell oscillator and SC-cut OCXO for best-in-class phase noise and ADEV.

LN CSAC GPSDO

CSAC core is disciplined through FireFly-IIA OCXO system for clean low noise output.

CSAC GPSDO

Industry-first commercial CSAC-based GPSDO for low-power holdover with atomic precision.

VIAVI’s selection of low power (LP) chip-scale atomic clock (CSAC) modules provide mobile atomic timing for power-constrained systems. These lower power CSAC are optimized for holdover, startup speed, and low power draw in mobile or tactical applications.

Applications

• Manpack radios and mobile tactical comms
• Unmanned systems (UAS/UAV) with power constraints
• Blue-force tracking and dismounted soldier systems
• Military-grade GPS timing with SAASM/M-Code
• Portable equipment in GNSS-interrupted environments

HD CSAC GPSDO

Compact 1.2 W module with fast warmup, RS-232, LVDS/CMOS, and rapid GNSS lock.

HD CSAC LP GPSDO

0.42 W in holdover mode with advanced power control and 5V operation.

SAASM HD CSAC/DOCXO

M-Code and P(Y)-code dual-band GNSS and CSAC/DOCXO options.

VIAVI’s selection of compact, OCXO based High-Stability GPSDOs offer low-g, low phase noise DOCXO/SOCXO options for airborne and tactical systems.

Applications

• Aircraft and avionics timing sources
• Timing synchronization in comms shelters
• Retrofit replacements for legacy Mini-T units
• Embedded systems with moderate holdover needs
• Space-constrained defense and industrial platforms
   

FireFly-1A

Ultra-low power OCXO GPSDO with fast warmup in a compact form factor.

FireFly-IIA

Advanced OCXO GPSDO with 3-port distribution amp, avionics support, and dual-oven stability.

Mini-JLT

Mini-T form factor replacement with improved GNSS performance and thermal resilience.

Micro-JLT/EGR

Rugged GPSDO with DOCXO or SOCXO options and best-in-class SWaP-C for embedded use.

GPSDOs delivering 10–100 MHz outputs, ultra-low phase noise, and advanced signal distribution for radar, satcom, and test systems.

Applications

• Radar and EW up-conversion chains (25/50/100 MHz)
• Satellite communications local oscillator reference
• Lab environments needing multiple signal outputs
• Systems requiring sine, CMOS, LVDS simultaneously
• Applications needing tilt/retrace/aging compensation

Fury GPSDO

DOCXO-based GPSDO with excellent holdover and phase noise performance.

ULN-1100

Compact GPSDO with 10 MHz and 100 MHz outputs, 3-port DA, low g sensitivity, and airborne-ready build.

ULN-2550

High-performance GPSDO with configurable outputs (10/25/50/100 MHz), retrace, tilt, and aging compensation for radar/satcom timing.

VIAVI’s portfolio of miniature GPSDOs are ideal solutions for OEM and embedded applications. These modules are compact solder-in and pluggable GPSDOs for OEM, telecom, and ultra-low SWaP applications.

Applications

• 5G/LTE base stations and small cells
• Network equipment requiring GNSS timing
• Financial time-stamping and embedded PCs
• IoT, SDR, and board-level GNSS integration
• Retrofit GPS timing modules for legacy systems

LTE-Lite

SMT GPSDO for LTE/5G with <0.2 W draw and 10/20 MHz synthesized sine/LVTTL outputs

Mini-PCIe

Plug-in GPSDO with 20 MHz, 1PPS, and USB/NMEA interface; ideal for embedded x86 and timestamping.

LC-XO

DIP-format GPSDO with OCXO/TCXO options, 10 MHz and 1PPS outputs, SCPI/NMEA control.

LC 1x1

Socketable GPSDO with OCXO, dual 10 MHz outputs (CMOS/LVDS), and <15 µs/day holdover.