Summation Research offers flexible, powerful solutions for Land Mobile Radio Data Communications requirements. Using reliable, field-proven LMR radios, Summation Research adds application-specific data processing and interface management capabilities. This blending of technologies allows reliable and cost-effective solutions for unique mobile telemetry and data communications applications.
STR-1800
The STR-1800 family of VHF/UHF transceivers represent a MIL-spec ruggedized land mobile solution for applications requiring high power (up to 45 Watts) as well as high reliability. The ultra-compact size of these radios makes them ideal for a wide variety of applications. The STR-1800 Multi-Mode Data Radio provides increased performance and functionality for deployment in legacy 25 kHz and newer 12.5 kHz and 6.25 kHz channels subject to FCC narrowbanding mandates. The radio supports many worldwide standards and can be provided with one or two independent receive channels for packet data repeating applications.
More Information
The STR-1800 family of VHF/UHF transceivers represent a MIL-spec ruggedized land mobile solution for applications requiring high power (up to 45 Watts) as well as high reliability. The ultra-compact size of these radios make them ideal for a wide variety of applications. The STR-1800 Multi-Mode Data Radio is a new generation of the STR line of mobile data radios that provides increased performance and functionality for deployment in legacy 25 kHz and newer 12.5 kHz and 6.25 kHz channels subject to FCC narrowbanding mandates.
The STR-1800 provides one of the fastest transmit turn-on and receive recovery times of similar high power products, making it an ideal choice for time-critical data telemetry applications. Supporting 25 kHz, 12.5 Khz, or 6.25 kHz channel spacing, the radio supports data speeds up to 19200 baud.
The main chassis is one-piece, die-cast aluminum, providing a product which is resistant to impact while also being extremely effective at heat dissipation. The thermal design provides for a high ratio of transmit to receive duty cycles. Up to 32 Configuration Profiles can be stored with user-defined link names and recalled with a single command, simplifying fast and accurate configuration changes.
A front panel DB-9 and DB-25 connectors provide all digital and analog user interfaces including those required for programming radio frequencies, bandwidths, and transmit power levels, as well as audio input/output, push to talk, and active channel selection. Rear panel connections are provided for the RF interface as well as primary power (+12 VDC).
SRI is a leading supplier of advanced products for defense, civil, and commercial satellite, aircraft and missile test range, and test & measurement data communications and telemetry applications and has been able to leverage knowledge and experience in these markets to apply proven, reliable military SOQPSK-TG telemetry transmission techniques to commercial Land Mobile Radio (LMR) data communications. Previous industry practices relied on variations of FSK and GMSK techniques to meet narrowbanding 6.25 kHz channel requirements. This breakthrough significantly improves link reliability and performance for applications requiring extended operating ranges over difficult terrain.
The radio features an output power level up to 45 Watts and is available for domestic and most international uses supporting analog and digital signals. Various models of the product family cover most commonly utilized VHF or UHF frequency bands. Different versions of the radio’s are certified through the FCC, IC, ASA, and ETSI.
Applications
- Long Range VHF/UHF Data Telemetry Links
- Distributed Power Control Systems
- Remote Monitoring of Oil/Gas, Water/Wastewater Stations
- SCADA Primary and Relay Stations
- Small / Micro / Nano / Cube Sat TT&C Links
- UAV, RPV and Similar Remote Control and Monitoring
Key Features
- Multiple Waveforms for 6.25, 12.5, and 25 kHz Channels
- Multi-Mode Analog and Digital Transceiver
- Embedded Audio Tone FM and Digital Modem
- Output power to 45W
- Field Upgradable for Enhanced Performance
- Support for multiple countries and regions
Specifications *
RFSpecifications
Frequency Range:
STR-1810 : 136 to 174 MHz
STR-1820 : 400 to 470 MHz
STR-1830 : 400 to 470 MHz (ETSI/Other Countries)
STR-1835 : 450 to 520 MHz (ASA)
Consult Factory for Other Frequency Bands
Channel Spacing: 25/12.5/6.25 kHz (UHF); 25/12.5 kHz (VHF)
Preset Channels: 8
Stability: +/- 0.0001% of Fc
Duty Cycle:
Capable of 30 seconds continuous transmit or 25% continuous transmit/receive duty cycle
Compliance:
Various models available for:
– FCC
– IC
– ETSI
– ASA
type certification. Contact factory for further information
Analog Modulation
Type: FM (V.23 FSK)
AAR Fast FSK (FFSK)
Rated Deviation:
+/- 5 kHz for 25 kHz Spacing
+/- 2.5 kHz for 12.5 kHz Spacing
Digital Modulation
Type: SOQPSK-TG
Data Rates: 1200, 4800 bps
Occupied Bandwidth: 25 kHz
12.5, 6.25 kHz (FCC Narrowband Compliant)
Interface Conversion
User In/Output Mode: V.23 FSK, RS-422
Over-The-Air Mode: V.23 FSK, SOQPSK
Transmit Characteristics
Output Power: Selectable between 5, 25, and 40 Watts
Output Protection:
Operating into a 10:1 VSWR of any phase angle will not damage the transceiver
Spurious/Harmonic Output: -70 dB below rated power
Modulation Sensitivity:
Adjustable from 50 mvolt RMS audio input signal for 60% of rated deviation
Frequency Response:
Flat from 300 to 3000 Hz (no pre-emphasis)
Turn-on Time:
Within 25 msec (UHF) or 40 msec (VHF) of keying, radio reaches 90% of rated output power.
Output SNR: 30 dB minimum fully modulated
Audio Input Impedance: 50 Ohm
Receive Characteristics
Sensitivity: 0.35 uV (12 dB SINAD) typical
Dynamic Range:
0 to -100 dBm for 23 dB SINAD (1 kHz Tone at 60% dev)
Spurious/Image Rejection: 70 dB minimum
Intermodulation: 70 dB minimum
Selectivity:
75 dB typical for 25 kHz spacing
65 dB typical for 12.5 kHz spacing
50 dB typical for 6.25 kHz spacing
Recovery Time: 30 msec from removal of key signal
Audio Output:
Adjustable from 60% dev for 1 V p-p output into 600 ohm resistive load for 1 kHz input signal
Frequency Response:
Flat from 300 to 3000 Hz (no de-emphasis)
Overload Protection:
A +28 dBm input continuous applied to input will not cause any permanent damage
Programming Control Specifications
Platform: Windows compatible PC
Preset Channel Controls:
Frequencies
Bandwidths
Output Power Levels
Interface:
Special control cable from serial COM port to STR-17xx
Other Specifications
Chassis: ~ 2″ High, ~ 6″ Wide, and ~ 7″ Deep
Weight: 3 lbs
Connectors
1 UHF for RF Input/Output
1 25 Pin D (Front Panel) for:
– Programming Interface
– Audio/Data Input/Output
– Preset Channel Selection
– PTT
1 9 Pin D (Front Panel) for:
– Programming Interface
– Digital Data Input/Output
Primary Power
13.6 VDC ± 15% ( transmit 12.5 A, receive 0.7 A)
MTBF: 25,000 Hours
Operator Adjustments: None
Temperature
-30° TO 60° C (Operational and Storage)
Vibration
2 g rms 5 Hz-300 Hz sinusoidal, 3 axes, continuous
Shock
10 g half sine, 15 msec; 3 axes
Humidity
Up to 100% ‘non-condensing’
Altitude
10,000 feet operating and 40,00 feet non-operating
* All specifications subject to change without notice or obligation to retrofit. Consult factory for custom options and/or alternate specifications.