VIAVI Micro-JLT GNSS Disciplined Oscillator (GNSSDO) Module with SOCXO or DOCXO
Low-SWaP-C GNSS disciplined oscillator module with a 10 MHz low phase noise sine output and 1 PPS, available with a SOCXO or DOCXO.
- 1 PPS Stability
- <10 ns to UTC RMS (1-Sigma)
- Serial Control
- GNSS NMEA and Status Output, SCPI-99 control, RS-422 Port
- GNSS Frequency, antenna power
- GPS/Glonass/Galileo/BeiDou/QZSS 3.3 V antenna-power built-in
- GNSS Receiver
- 72 Channels, Auto-Survey, Position-Hold Mode, and SBAS capable
Overview
The VIAVI Micro-JLT is a GNSS disciplined oscillator (GNSSDO) module with lower size, weight, power and cost (SWaP-C) and higher performance than legacy GPSDOs. It is built on a rugged platform for high-volume, low-cost applications and uses a latest-generation GNSS receiver.
The Micro-JLT is form and function compatible with the FireFly-IIA GPSDO. Variants are available for high-vibration and high-shock environments, with either a SOCXO or a DOCXO oscillator.
The module provides a subset of the features of the legacy FireFly-IIA and Mini-JLT products to reduce cost, while offering comparable or higher performance. Streamlined manufacturing techniques make it suitable for high-volume applications.
Software
The Micro-JLT is compatible with the GPSCon control program, a freeware application available from VIAVI. JLTerm and dedicated Micro-JLT GNSS software are also available for download. The product is offered in a range of configurations to meet different requirements.
Key Features
- Latest generation GNSS receiver
- 10 MHz sine output with ultra low phase noise
- LVDS, RS-422, or TTL interfacing
- Ruggedized SOCXO or DOCXO variants
- Extended temperature range with Low-G variants available
- SMA connectors for antenna input and 10 MHz outputs
- Form and function compatible with the FireFly-IIA GPSDO
- Compatible with the GPSCon control program
Specifications
| 1 PPS Stability |
<10 ns to UTC RMS (1-Sigma)
GPS Locked
|
|---|---|
| Serial Control | GNSS NMEA and Status Output, SCPI-99 control, RS-422 Port |
| GNSS Frequency, antenna power | GPS/Glonass/Galileo/BeiDou/QZSS 3.3 V antenna-power built-in |
| GNSS Receiver | 72 Channels, Auto-Survey, Position-Hold Mode, and SBAS capable |
| Sensitivity, Acquisition | -148 dBm |
| Sensitivity, Tracking | -167 dBm |
| GNSS TTFF, Cold Start | <29 sec |
| GNSS TTFF, Warm Start | <2 sec |
| GNSS TTFF, Hot Start | <2 sec |
|
0.1 s
SOCXO
|
<3E-12 |
|---|---|
|
1 s
SOCXO
|
<6E-12 |
|
1K s
SOCXO
|
<9E-12 |
|
100K s
SOCXO
|
<4E-12 |
|
0.1 s
DOCXO
|
<2E-12 |
|
1 s
DOCXO
|
<5E-12 |
|
1K s
DOCXO
|
<7E-12 |
|
100K s
DOCXO
|
<4E-12 |
|
Holdover
SOCXO
|
<2 μs in 5 hours
at 25.0°C, no airflow/motion/vibration, 5 days GPS locked
|
|---|---|
|
Holdover
DOCXO
|
<2 μs in 24 hours
at 25.0°C, no airflow/motion/vibration, 5 days GPS locked
|
|
Warmup and Stabilization Time
SOCXO
|
<12 min at +25°C to <1E-09 Accuracy to GNSS |
|
Warmup and Stabilization Time
DOCXO
|
<12 min at +25°C to <5E-10 Accuracy to GNSS |
|
Supply Voltage (Vdd)
SOCXO
|
5.5 V +0.5 V/-0.3 V, 5.0 V optional |
|---|---|
|
Supply Voltage (Vdd)
DOCXO
|
5.0 V +0.5 V/-0.3 V |
| Frequency Output | 10 MHz Sine Wave |
|---|---|
|
10 MHz Retrace
SOCXO
|
<±1E-09 After 1 Hour @ +25°C
no GNSS
|
|
10 MHz Retrace
DOCXO
|
<±5E-010 After 1 hour @ +25°C
no GNSS
|
|
Frequency Stability (over Temperature, over 24 hours)
SOCXO
|
±6E-09, <1E-012 over 24hrs
with GNSS
|
|
Frequency Stability (over Temperature, over 24 hours)
DOCXO
|
±2E-010, 5E-013 over 24 hours
with GNSS
|
| Output Harmonics, spurs | <-50 dBc/Hz, <-125 dBc/Hz |
|
OCXO Aging
SOCXO
|
<±0.1 ppm per year without GNSS
fully compensated by GNSS
|
|
OCXO Aging
DOCXO
|
<±0.05 ppm per year without GNSS
fully compensated by GNSS
|
| 1 Hz | -100 dBc/Hz |
|---|---|
| 10 Hz | -130 dBc/Hz |
| 100 Hz | -140 dBc/Hz |
| 1 kHz | -152 dBc/Hz |
| 10 kHz | -156 dBc/Hz |
| 100 kHz | -158 dBc/Hz |
| 10 MHz Sine Wave Out |
SMA
Available connections are determined by selected Micro-JLT product
|
|---|---|
| GNSS Antenna |
SMA
Available connections are determined by selected Micro-JLT product
|
| +5.5 V or +5.0 V Power |
2-pin Hirose, PN: DF11-12DP-2DSA(01)
Available connections are determined by selected Micro-JLT product
|
| 1 PPS output |
2-pin Hirose, PN: DF11-12DP-2DSA(01)
Available connections are determined by selected Micro-JLT product
|
| RS-422 serial |
2-pin Hirose, PN: DF11-12DP-2DSA(01)
Available connections are determined by selected Micro-JLT product
|
| 1 PPS Input, ISP# |
3-pin 100 mil through hole
Available connections are determined by selected Micro-JLT product
|
|
Operating Temperature (Standard Temperature)
DOCXO
|
0ºC to +75ºC |
|---|---|
|
Storage Temperature (Standard Temperature)
DOCXO
|
-40ºC to +85ºC |
|
Operating Temperature (Extended Temperature)
SOCXO
|
-40ºC to +85ºC |
|
Storage Temperature (Extended Temperature)
SOCXO
|
-55ºC to +85ºC |
|
Operating Temperature (Extended Temperature)
DOCXO
|
-20ºC to +75ºC |
|
Storage Temperature (Extended Temperature)
DOCXO
|
-40ºC to +85ºC |
Specifications are taken from the manufacturer's documentation. See the datasheet for complete and current values.
Applications
- Defense
- 5G communications
- SATCOM
- Transportation
- Data center
- Energy
- Financial
- Critical infrastructure
Options & Accessories
| Option | Description |
|---|---|
| 100312 | MICRO-JLT GNSS SOCXO Extended Temp 5.5V - RoHS — SOCXO configuration |
| 100316 | MICRO-JLT GNSS SOCXO Extended Temp TTL 5.5V - RoHS — SOCXO configuration |
| 100325 | MICRO-JLT GNSS SOCXO Extended Temp 5V OPT - RoHS — SOCXO configuration |
| 100333 | MICRO-JLT GNSS SOCXO Extended Temp 5V OPT TTL - RoHS — SOCXO configuration |
| 100361 | MICRO-JLT GNSS SOCXO Extended Temp Low G 5V OPT TTL - RoHS — SOCXO configuration |
| 22174869 | MICRO-JLT GNSS DOCXO Standard Temp 5V OPT - RoHS — DOCXO configuration |
| 22174876 | MICRO-JLT GNSS DOCXO Ext Temp Low G TTL 5V OPT - SMP - RoHS — DOCXO configuration |
| 22174870 | MICRO-JLT GNSS DOCXO Standard Temp TTL 5V OPT - RoHS — DOCXO configuration |
| 22174871 | MICRO-JLT GNSS DOCXO Extended Temp Low G TTL 5V OPT - RoHS — DOCXO configuration |