Motorola DR 3000 service manual Sinad

3-2Transceiver Performance Testing: Setup

Table 3-2. Receiver Performance Checks

Test Name	Communications	Radio	Test Set	Comment
	Analyzer
Rated Audio	Mode: GEN	Use tuner tool	PTT to OFF	Set volume to
	Output level: 1.0 mV RF	to program	(center),	7.75 Vrms via
	4th channel test	repeater to an	meter	tuner tool.
	frequency*	appropriate	selector to
	Mod: 1kHz tone at	test frequency	Audio PA
	3 kHz deviation	with carrier
	Monitor: DVM: AC Volts	squelch.
Distortion	As above, except to	As above	As above	Distortion <5.0%
	distortion
Sensitivity	As above, except SINAD,	As above	PTT to OFF	RF input to be
(SINAD)	lower the RF level for		(center)	<0.3 µV
	12 dB SINAD.
	RF level set to 1mV RF	As above	PTT to OFF	Set volume to
			(center),	7.75 Vrms via
Noise			meter	tuner tool.
Squelch			selection to
Threshold			Audio PA,
(only radios			speaker/ load
with			to speaker
conventional
	As above, except change	out of TEST	As above	Unsquelch to
system need
	frequency to a	MODE; select		occur at <0.25 µV.
to be tested)
	conventional system.	a conventional		Preferred SINAD
	Raise RF level from zero	system		= 9 - 10 dB
	until radio unsquelches.

February 21, 2007 6866576D03-A