4RF has a long history of developing high performance radios, and the Aprisa SR family builds on this same engineering excellence.

The Aprisa SR and Aprisa SR+ are distance-engineered and optimised for SCADA and telemetry applications, providing reliable, robust performance however demanding the conditions: what we call ‘real world radio’. RF performance is unbeatable, with attention paid to every element of the design: transmitter, receiver, modulation and efficiency.

The receiver maintains exceptional low noise operation via excellent sensitivity for greater distance and high selectivity and intermodulation suppression for superior protection from interference.

This performance is complemented by fast switching circuitry and high transmit power ensuring long distance operation with exceptional system reliability and availability.

Aprisa SR Transmitter Power output 0.01 – 5.0 W

(+10 to +37 dBm, 1 dB steps) Adjacent channel power < –60 dBC Transient adjacent channel power < –50 dBC Spurious emissions < –37 dBm Attack time < 1.5 ms Release time < 1.5 ms Data turnaround time < 10 ms Aprisa SR+ Transmitter Power output 64 QAM 0.01 – 2.5 W

(10 – 34 dBm, in 1 dB steps)

16 QAM 0.01 – 3.2 W

(10 – 35 dBm, in 1 dB steps)

QPSK 0.01 – 5.0 W

(10 – 37 dBm, in 1 dB steps)

4-CPFSK 0.01 – 10.0 W

(10 – 40 dBm, in 1 dB steps) Adjacent channel power < –60 dBC Transient adjacent channel power < –60 dBC Spurious emissions < –37 dBm Attack time < 1.5 ms Release time < 0.5 ms Data turnaround time < 2 ms

Receiver Sensitivity (BER < 10-2) –117 dBm (12.5 kHz)

–114 dBm (25 kHz)

(9.6 kbps, BER 10-2)

–114 dBm (19.2 kbps, BER 10-2) Adjacent channel selectivity > 60 dB Co-channel rejection > –12 dB Intermodulation response rejection > 70 dB Blocking or desensitisation > 84 dB Spurious response rejection > 75 dB Receiver Sensitivity (BER < 10-2) max coded QPSK –120 dBm (12.5 kHz)

–120 dBm (25 kHz) Sensitivity (BER < 10-2) max coded 64 QAM –109 dBm (12.5 kHz)

–106 dBm (25 kHz) Adjacent channel selectivity > 60 dB (12.5 kHz)

> 66 dB (25 kHz) Co-channel rejection max coded QPSK > –5 dB Co-channel rejection max coded 64 QAM > -20 dB Intermodulation response rejection > 70 dB Blocking or desensitisation > 84 dB Spurious response rejection > 75 dB

The Aprisa SR confirms to all relevant ETSI, FCC and Industry Canada technical and performance specifications, as well as a number of specific country homologations / certifications where required. Please contact us with any questions specific to your country. The Aprisa SR+ will be ETSI-certified at initial availability

Smart radio: smart SCADA.

Get smart and contact us to find out more about how you could benefit from the Aprisa SR and Aprisa SR+.