Motorola SSETM 5000 service manual Receiver Performance Checks, Test Mode CSQ, Sinad

4-6 Performance Checks: Receiver Performance Checks

4.3Receiver Performance Checks

The following table outlines the performance checks for the receiver.

Table 4-5. Receiver Performance Checks

Test Name	System Analyzer	Radio	Test Set	Comments
Reference	RF Control: Monitor	TEST MODE CSQ	PTT to continuous	UHF R2 (450–488 MHz):
Frequency	Meter: RF Display	channel*	(during the	2.5 ppm
	Display: Bar Graphs		performance
	Freq: Selected radio TX		check)
	freq.
Rated Audio	RF Control: Gen	As above	PTT to OFF	Set volume control to
	Output Level: -47 dBm		(center)	3.74 Vrms
	Freq: Selected radio RX
	freq.
	Mod: 1 kHz tone @ 3 kHz
	dev.
	Meter: AC Volts
Distortion	As above, except	As above	As above	Distortion < 3.0%
	Meter: Ext Dist.
Sensitivity	As above, except	As above	As above	RF input to be < 0.35 µV
(SINAD)	Meter: SINAD
Noise Squelch	Set as for rated audio	Out of TEST	As above	Set volume control to
Threshold	check	MODE		3.74 Vrms.
				Set RF level to -130 dBm
				and raise until radio
				unsquelches.
				Unsquelch to occur at
				< 0.25 µV. Preferred SINAD
				= 6-8 dB.

*See Table 4-4 on page 4-4.

November 11, 2004 6881094C12-A