Secure µPNT STL-1000 LEO Receiver Module, M.2 2242 B-Key Embedded LEO/GNSS PNT Receiver

M.2 2242 B-Key LEO/GNSS embedded PNT receiver module with MEMS TCXO GPSDO holdover, 10 MHz and 1 PPS outputs and ≤1.0 W power.

GPS Locked: <15 ns rms
STL Locked: <65 ns rms

Datasheet

Overview

The VIAVI Secure µPNT STL-1000 is a software-defined STL LEO/GNSS embedded Positioning, Navigation and Timing (PNT) receiver module built to the M.2 2242 B-Key form factor. It supports the Iridium-based VIAVI SecureTime altGNSS LEO services, providing PNT when GNSS is unavailable. The module is derived from the field-tested STL-2600 and STL-1400 receivers, with a form factor modified to follow the M.2 B-Key socket standard.

The module measures 22 mm x 42 mm x 2.3 mm, weighs 3.6 g and typically consumes 1.0 W, which suits applications that need a very small, low-power, resilient embedded PNT receiver.

Timing and holdover

The STL-1000 combines a MEMS TCXO with VIAVI GPSDO disciplining technology, so it can operate as a compact GPSDO with holdover capability. It is the only STL receiver in the family with this capability. An external 1 PPS input can also be used for disciplining.

Outputs and control

The module provides 10 MHz and 1 PPS outputs, NMEA-based position, navigation and timing data, raw satellite observables and GNSS parameters. It is controlled through SCPI and NMEA serial interfaces, its firmware can be upgraded in the field, and it works with the GPSCon and JLTerm control software.

Key Features

M.2 B-Key form factor
MEMS TCXO 10 ppb providing GPSDO timing and holdover capability
STL receiver supporting Iridium PNT-based SecureTime service options
1 PPS output accuracy <65 ns rms to UTC (STL)
CMOS 3.3 V 10 MHz and 1 PPS output signals
External 1 PPS input signal support for disciplining
SCPI and NMEA serial interfaces
Field-upgradeable firmware
Low power operation (typically ≤1.0 W)
Compatible with GPSCon and JLTerm control software

Specifications

1 PPS Stability

GPS Locked	<15 ns rms GPS locked (After 48 Hr Lock)
STL Locked	<65 ns rms STL lock capability requires active subscription to Iridium based SecureTime altGNSS LEO services

Receiver

NMEA Messages	GGA, RMC, ZDA, GSV, PASHR, GSA
GNSS Receiver	GPS/GLONASS/Galileo/BeiDou/QZSS/SBAS
STL Receiver	3.3 V antenna-power built-in, custom-designed receiver

Sensitivity

GPS Acquisition	–148 dBm
GPS Tracking	–167 dBm
STL Tracking	-120 dBm 25 dB antenna LNA gain assumed

MEMS Oscillator

Frequency Output	10 MHz CMOS 3.3 V
Frequency Stability over Temperature in Holdover mode	±1.0E-08 -40 to +80°C
10 MHz Accuracy	<±1.5E-10 after 20 minutes with STL or GNSS; STL lock requires active SecureTime altGNSS LEO subscription
Phase Noise	<-75 dBc/Hz @1 Hz
MEMS TCXO	10 ppb

I/O Signals and Connectors

RF Antenna	Miniature U.Fl Coax, Combined Input for STL and GNSS
10 MHz Output	Auxiliary Hirose Connector, CMOS 3.3 V
10 MHz Input	Auxiliary Hirose Connector, External 10 MHz Reference Input Signal
1 PPS Output	Auxiliary Hirose Connector, UTC (GPS) and UTC (STL) synchronized, CMOS 3.3 V, 200 ms pulse-width
1 PPS Input	Auxiliary Hirose Connector, External 1 PPS Reference Input Signal
Serial Control	Auxiliary Hirose Connector, 9,600 to 921,600 bps, TTL NMEA out, SCPI Control/Monitoring, External CSAC/Rb Oscillator Control, Status Signals, In Situ Firmware Updates
M.2 USB	B-Key 2242 Connector

Power

Power Consumption	1.0 W Typical
Supply Voltage (Vdd)	+3.3 V: +0.2 V, -0.1 V

Environmental

Operating Temperature	-40°C to 85°C
Storage Temperature	-45°C to 95°C

Regulatory and Compliance

Regulatory Standards	CE/UKCA, RoHS/WEEE, REACH, Canadian Standards Association (CSA), Radio Equipment Directive (RED)

Physical

Width	0.87 inch/22 mm
Depth	1.65 inch/42 mm
Height	0.09 inch/2.3 mm
Weight	0.128 oz/3.6 grams Web page states 3.6 g (0.2 oz); datasheet value used

Specifications are taken from the manufacturer's documentation. See the datasheet for complete and current values.

Applications

Defense
5G communications
Transportation
Data centers
Energy
Financial services
Critical infrastructure
PNT in GNSS-denied environments

Options & Accessories

Option	Description
22187422-000	Secure µPNT STL-1000 LEO Receiver
SecureTime altGNSS LEO-S	SecureTime altGNSS LEO-S service option — Iridium-based SecureTime service; an active subscription is required for STL lock
SecureTime altGNSS LEO LOCUS	SecureTime altGNSS LEO LOCUS service option — Iridium-based SecureTime service; an active subscription is required for STL lock