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SRL-35 External Radio

SRL-35 External Radio

Heavy-Duty UHF Radio
• Configurable output power of up to 35 Watts.
• Wide and tunable 70 MHz (403-473 MHz) operating range.
• User-selectable channel spacing (12.5, 20 or 25 kHz).
• Compatible with existing Topcon and 3rd party radio products such as Satel, Trimble, and Pacific Crest rover
• IP67 rating to withstand harsh environments.
• Automatic prevention of overheating.
• Multi-function LCD user interface.

Heavy-duty and Reliable
The SRL-35 is an all-weather UHF base radio with configurable high power output (up to 35 W1) and a full 70 MHz tuning range. Designed for easy operation in demanding field conditions, the reinforced casing and connectors are fully waterproof and secure against dust (IP67). In addition to flexible output power and a wide tuning range, the SRL-35’s channel spacing can set to 12.5, 20 or 25 kHz with complementary protocol support to satisfy high-efficiency narrowbanding2 requirements. The unit’s weather-proof LCD display clearly indicates the current operating status, and the integrated keypad allows direct configuration of the current operating channel, power level, and radio protocols. Interoperability is provided for several 3rd party radios protocols including Satel, PDL, and                                                                                              TrimTalk3 formats.

Dependable and Powerful
The SRL-35 uses a Forward Error Correction (FEC) approach which ensures dependable communication links and a minimum of data loss. At full power, communication distances of up to 80km can be achieved in good conditions. The SRL-35 can also function as a repeater using a second SRL-35 and doubling your operating range.

SRL-35 Specification

Frequency Range 403 – 473 MHz
Tuning Range 70 MHz
Channel Spacing 12.5 / 20 / 25 kHz (SW selectable)
Frequency Error Tolerance < 1kHz
Type of Emission F1D
Communication Mode Half-Duplex
Carrier Power 10, 20, 25, or 35W / 50 ohm (default
5, 10, 20 or 25W / 50 ohm (option1)
Carrier Power Stability +2 dB / -3 dB
TX Duty Cycle 4 100% (22°C / 35°C) 40%
35W 20 min / 13 min No limit
10W No limit / 50 min No limit
Sensitivity < -114 dBm (BER < 10 E-3)5
Co-channel Rejection > -12 dB
Adjacent Channel Selectivity > 47 dB @12.5 kHz / > 52 dB @ 25 kHz
Intermodulation Attenuation > 60 dB
Spurious Radiation < 2 nW
Data Modem
Interface RS-232
Interface Connector IP67, 8-pin ODU
Data Speed of RS Interface 300 – 38400 bps
Data Speed of Radio Interface 19200 bps (25 kHz) / 9600 bps (12.5 / 20 kHz)
Data Format Asynchronous RS-232
Radio Protocols3 Satel / PDL / TrimTalk
Power and Electrical
Power Consumption (average) 1.8W typical (Receive)
120W typical (Transmit 35W output power)
100W typical (Transmit 25W output power)
0.4W typical (Sleep State)
Operating Voltage6 +9 to +16 VDC / 4-pin ODU MINI-Snap Size 1 (feeding)
Dimensions 189 x 138 x 71mm (with connectors) (h x w x d)
Weight 1.42kg
Antenna Connector TNC, 50 ohm, female
Enclosure Aluminium
Temperature Range Operating: -25°C to +55°C, -40°C to +75°C (absolute min / max)
Storage: -40°C to +85°C
Waterproof / Dustproof Rating IP67 (NEMA 6)

Watch SRL-35 video

Download SRL-35


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