User's Manual

page 41/64
Note d’étude / Technical document : URD1– OTL
5665.3 – 003 / 72238 Edition 01
Document Sagemcom Reproduction et divulgation interdites
Sagemcom document. Reproduction and disclosure prohibited
Figure 42: Power consumption at DRX9 (with RS-NGMO2 power supply)
When the HiLoNC V2 module leaves the sleep mode thanks to the network incoming signal or by action of the
user the power consumption will step from the <1.7mA to 15mA and then to 25mA in around 2 seconds.
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The behaviour of the system at wake-up:
• System resumes from clock 32 MHz, the power consumption rises to around 15mA.
• System resumes the hardware blocks, the power consumption rises to around 25mA.
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To perform the correct measurement of the power supply of a system using a HiLoNC V2 module, refer to
the specification TW0.9 version 4.7 June 2008 chapter "standby test procedure" from the GSM
association. This specification explains how to proceed and what apparatus have to be used to perform
the test.
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Check also SAGEMCOM document "Getting started with the current consumption measurement"
The main parameters for a compliant measurement are:
Parameter Idle Mode Setting Idle Mode Setting
Measurement Serial Resistance 0.5 ohms
Tolerance/Type. 1%, 0.5W, high precision metal film resistor
Sampling frequency 50 k samples/s
Resolution 0.1mA over the full dynamic range of module currents
Noise floor Less than lowest ADC step