Is your digital RF communication system optimised to provide the high performance it was designed to deliver?

Is your digital RF communication system optimised to provide the high performance it was designed to deliver?

Published: 17th May 2016

Digital radio systems operate differently than legacy analogue systems. Although digital modulation alignments are similar to alignments used in analogue radio systems, digital radios require more precise alignment to achieve optimum performance and must be verified for digital modulation performance. Proper alignment can improve systems performance to maximize and deliver the high performance that it was designed to provide. Improper alignments can cause degraded digital modulation accuracy, which has a significant impact on the receiver’s ability to recover digital data. In some instances, this can affect the range to the same extent as a 75% reduction in power.

This white paper uses statistical data provided through extensive lab testing and through the use of actual recorded digital radio RF transmitter parameters. It shows how modulation alignments of one radio’s transmitter parameters can positively or negatively affect performance of another radio’s receiver. The performance of various radio receivers were measured using popular radios with transmitters that have been aligned using OEM approved techniques. The tests utilized FM deviation meters for aligning modulation balance and modulation-limiting parameters, while accommodating for variations in meter specification and audio filter settings.

The conclusion from these tests indicate that with a proper understanding of digital radio operations, performance can be significantly improved. The proper setting of audio filter parameters and the use of accurate deviation meters can also improve digital radio performance. Conversely, the use of inaccurate FM deviation meters compounded by improper audio filter settings and lack of knowledge of meter specifications and operation, can dramatically and
negatively impact digital radio performance.

You Might also like

IFR6000 Training Video 2

IFR6000 Transponder/DME/TCAS Flight Line Test Set Training Videos.

Check out the latest training video for the IFR6000 Transponder/DME/TCAS Flight Line Test Set from Viavi

Read more
25 year old SESD 200 successfully calibrated

25 year old SESD 200 successfully calibrated

At the beginning of calendar year 2020, an old model of the "SESD 200" series successfully passed Schlöder's factory calibration in accordance with the IEC 61000-4-2 standard.

Read more
Wi-Fi 6 and 6E Testing with IQxel-MW 7G

Wi-Fi 6 and 6E Testing with IQxel-MW 7G

In the following video, you will see LitePoint’s IQxel-MW 7G, the first fully integrated tester to support Wi-Fi testing in the 2.4 and 5 GHz and 6 GHz bands.

Read more

Sign up for the MCS Newsletter

You will receive all the latest test & measurement news and rental offers.