VIAVI STL-1400 Low Power LEO Receiver Module for SecureTime LEO Timing and Positioning
Low-SWaP LEO receiver module delivering timing and positioning from Iridium signals via VIAVI SecureTime LEO services.
- 1 PPS UTC Stability
- <45 ns rms
- Serial Control
- TTL NMEA and Status Output, SCPI serial control and monitoring
- NMEA Messages
- GGA, RMC, ZDA, GSV, PASHR, GSA
- STL Receiver
- 3.3 V antenna-power built-in, custom-designed receiver
Overview
The VIAVI STL-1400 is a low-cost receiver module designed for low size, weight and power (SWaP), battery-operated handheld applications. It is intended for use with VIAVI's Iridium-based SecureTime LEO services.
The module delivers timing and dynamic or stationary positioning data at various accuracy levels using signals from Iridium satellites. A DSP chip supports the SecureTime LEO services for indoor and outdoor reception, and a disciplined oscillator provides holdover capability.
The STL-1400 is suited to critical infrastructure applications that rely on resilient positioning, navigation and timing (PNT) services to complement GPS/GNSS. Configuration and monitoring are supported by the GPSCon Controller and JLTerm software.
Key Features
- NMEA, 10 MHz and 1 PPS outputs
- Low power modes (<0.5 W)
- OCXO oscillator with holdover capability
- Jamming and spoofing resistant
- Timing and dynamic/stationary positioning from Iridium satellite signals
- SCPI serial control and monitoring
- Field upgradeable firmware through SCPI serial port
Specifications
| 1 PPS UTC Stability |
<45 ns rms
1-sigma, stationary, external Rubidium reference
|
|---|---|
| Serial Control | TTL NMEA and Status Output, SCPI serial control and monitoring |
| NMEA Messages | GGA, RMC, ZDA, GSV, PASHR, GSA |
| STL Receiver | 3.3 V antenna-power built-in, custom-designed receiver |
| STL Sensitivity, Tracking |
-120 dBm
25 dB antenna LNA gain assumed
|
| Supply Voltage (Vdd) | +3.3 V: 0.2 V, -0.1 V |
| Power Consumption |
0.85 W typical
Web page lists low power modes (<0.5 W); datasheet value given here
|
| Operating Temperature | -20°C to +75°C |
|---|---|
| Storage Temperature | -45°C to +95°C |
| Frequency Output | 10 MHz CMOS 3.3 V |
|---|---|
| 10 MHz Accuracy |
<±0.5E-010 after 20 minutes with STL or external 1 PPS
STL Lock capability requires active subscription to Iridium based SecureTime LEO services
|
| Frequency Stability over Temperature in GNSS/STL Holdover |
±75E-08
0°C to +60°C
|
| Output spurs | <-110 dBc/Hz |
| 1 PPS, 10 MHz External Reference Input | Supports optional external 1 PPS and/or 10 MHz reference inputs |
|---|---|
| 10 MHz Output | CMOS 3.3 V, low phase noise |
| 1 PPS Outputs | UTC (GPS) and UTC (STL) synchronized, CMOS 3.3 V, 200 ms pulse-width |
| RF Antenna | Miniature U.Fl coax, +3.3 V, 60 mA max |
| +3.3 V Power, 10 MHz out, 1 PPS out, TTL status, TTL serial, ISP/RST | 20-pin Samtec, PN: TFM-110-11-H-D |
| Serial Ports (9,600 to 921,600 baud) | NMEA out, SCPI Control/Monitoring, External CSAC/Rb Oscillator control |
| In Situ firmware updates | Fully field upgradeable through SCPI serial port |
| Catalog Number |
22185820
STL-1400 LEO Receiver 3.0 – Timing and Position
|
|---|
Specifications are taken from the manufacturer's documentation. See the datasheet for complete and current values.
Applications
- Battery-operated handheld devices
- Critical infrastructure timing
- Resilient PNT to complement GPS/GNSS
- Timing and positioning in GNSS-denied environments
Options & Accessories
| Option | Description |
|---|---|
| SecureTime altGNSS LEO-S | SecureTime altGNSS LEO-S service option — SecureTime service option; STL Lock capability requires active subscription to Iridium based SecureTime LEO services |
| SecureTime altGNSS LEO LOCUS | SecureTime altGNSS LEO LOCUS service option — SecureTime service option; STL Lock capability requires active subscription to Iridium based SecureTime LEO services |
