Rss Measurement - RACOM RAy3 User Manual

Installation

4.7.3. RSS measurement

There are 4 tools available to support measurement of the 2 basic parameters for optimum antenna
alignment: RSS (Radio Signal Strength) and MSE (Mean Square Error, the inverse to often used value
called SNR - Signal to Noise Ratio):
1. Voltmeter – indicates local RSS
2. RAy Tools smartphone application – indicates RSS, MSE - Local & Peer
3. Antenna Alignment Tool web page – indicates RSS, MSE – Local & Peer
4. Bar graph on Live Data page inside web management – indicates RSS, MSE, BER – Local & Peer
Before antenna alignment starts, it is recommended to find out RSS and MSE values from the link
design for the installed link or calculate these values yourself. There are 4 methods available with in-
creasing levels of accuracy:
• Module Calculation inside RAy Tools smartphone application
• Link calculation on RACOM website
• Use Link calculation chapter in Application notes
• Precise link calculation using dedicated tools (e.g. Pathloss)
Voltmeter
RAy units support traditional antenna alignment using a volt-
meter measurement representing RSS in dBm (only for a
local unit). Connect a voltmeter with the range 2V DC via
connectors to the operational unit and adjust antennas to the
lowest indicated voltage. Voltage is calibrated according to
signal strength. E.g.:
RSS -65 dBm corresponds to voltage 0.65 V,
RSS -80 dBm corresponds to voltage 0.80 V etc.
RAy Tools – smartphone application
RAy Tools is an application described in detail in Chapter 7.
RAy Tools app for Mobile devices . Module Alignment displays
RSS and MSE for both local and peer RAy unit. All key func-
tionality in this module performs an identical function to An-
tenna Alignment Tool described in Section 5.6.2 Live data .
More about RAy Tools in Chapter 7. RAy Tools app for Mobile
devices .
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https://www.racom.eu/eng/products/microwave-link.html#calculation
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https://www.racom.eu/eng/products/m/ray/app/linkcalc/index.html
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RAy3 Microwave Link – © RACOM s.r.o.