Motorola M12 Oncore Guide de l'utilisateur télécharger pdf (Page 50)

Chapter 3 – Receiver Description

Motorola GPS Products - Oncore User’s Guide

NOISE DENSITY RATIO (C/NO)

/No is

RECEIVED CARRIER TO

The Position/Status/Data Message outputs C/No, which can be used to determine

the relative signal levels of received satellite signals (refer to Figure below). C

the received carrier to noise density ratio. The units are dBHz, where No is the noise

density ratio received in a 1 Hz bandwidth. The plot in Figure 3.13 is linear. The

satellite signal strength is measured at the antenna input. Typically, the C/No is

between 30 and 55 dB.

Figure 3.13

Revision 5.0 08/30/02

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Motorola M12 Oncore Guide de l'utilisateur Page 50