LG Electronics U250 service manual Sound Pressure Level, Charging, Test Item Specification

2. PERFORMANCE

2.7 Sound Pressure Level

No	Test Item			Specification
1	Sending Loudness Rating (SLR)			8 ±3 dB
2	Receiving Loudness Rating (RLR)		Nor	-4 ± 3 dB
			Max	-15 ± 3 dB
3	Side Tone Masking Rating (STMR)	MS	Min	17 dB
4	Echo Loss (EL)		Min	40 dB
5	Idle Noise-Sending (INS)		Max	-64 dBm0p
6	Idle Noise-Receiving (INR)		Nor	Under -47 dBPA
			Max	Under -36 dBPA
7	Sending Loudness Rating (SLR)			8±3dB
8	Receiving Loudness Rating (RLR)		Nor	-1 ±3 dB
			Max	-12 ±3 dB
9	Side Tone Masking Rating (STMR)	Headset	Min	25 dB
10	Echo Loss (EL)		Min	40 dB
11	Idle Noise-Sending (INS)		Max	-55 dBm0p
12	Idle Noise-Receiving (INR)		Nor	Under -45 dBPA
			Max	Under -40 dBPA
	TDMA Noise
	-. GSM : Power Level : 5
	DCS/PCS : Power Level : 0
	(Cell Power : -90 ~ -105 dBm)	MS and
13			Max	Under -62 dBm
		Headset
	-. Acoustic (Max Vol.)
	MS/Headset SLR : 8 ± 3dB
	MS/Headset RLR : -15 ± 3dB/-12
	(SLR/RLR : Mid-value setting)

2.8 Charging

•Charging Method : CC & CV (Constant Current and Constant Voltage)

•Maximum Charging Voltage : 4.2 V

•Maximum Charging Current : 700 mA

•Normal Battery Capacity : 950 mAh

•Charging Time : Max 3 hours (except for trickle charging time)

•Full charging indication current (charging icon stop current) : 80 mA

•Cut-off voltage : 3.20 V

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