Motorola EP450 service manual VHF R2 UHF R1 UHF R2 UHF R3

4-4							Performance Checks: RF Test Mode
			Table 4-4. Test Frequencies
	Channel Selector		Test Channel		VHF R2		UHF R1	UHF R2		UHF R3
	Switch Position				(MHz)		(MHz)	(MHz)		(MHz)
	1 Low Power		TX#1 or #8		146.625	403.625		438.625		465.625
	8 High Power		RX#1 or #8
	2 Low Power		TX#2 or #9		150.775	409.775		443.775		470.775
	9 High Power		RX#2 or #9
	3 Low Power		TX#3 or #10		155.275	415.275		448.275		475.275
	10 High Power		RX#3 or #10
	4 Low Power		TX#4 or #11		160.125	421.125		454.125		480.125
	11 High Power		RX#4 or #11
	5 Low Power		TX#5 or #12		164.475	427.475		459.475		485.475
	12 High Power		RX#5 or #12
	6 Low Power		TX#6 or #13		169.475	433.475		464.475		490.475
	13 High Power		RX#6 or #13
	7 Low Power		TX#7 or #14		173.875	439.875		469.875		494.875
	14 High Power		RX#7 or #14
			Table 4-5. Receiver Performance Checks
Test Name		Communications Analyzer			Radio		Test Set			Comments
Reference		Mode: PWR MON		TEST MODE,			PTT to continu-		Frequency error to be
Frequency		4th channel test frequency*		Test Channel 4			ous (during the		±200 Hz VHF
		Monitor: Frequency error		carrier squelch			performance		±500 Hz UHF
		Input at RF In/Out		output at			check)
				antenna
Rated Audio		Mode: GEN		TEST MODE			PTT to OFF		Set volume control to
		Output level: 1.0m V RF		Test Channel 4			(center), meter		3.24Vrms
		4th channel test frequency*		carrier squelch			selector to Audio
		Mod: 1 kHz tone at					PA
		3 kHz deviation
		Monitor: DVM: AC Volts
Distortion		As above, except to distortion		As above			As above		Distortion <5.0%
Sensitivity		As above, except SINAD,		As above			PTT to OFF		RF input to be <0.30
(SINAD)		lower the RF level for 12 dB					(center)		∝V (0.25 ∝V typical).
		SINAD.
Noise		RF level set to 1 mV RF		As above			PTT to OFF		Set volume control to
Squelch							(center), meter		3.24 Vrms
Threshold							selection to
(only radios							Audio PA, spkr/
with conven-							load to speaker
tional system
		As above, except change fre-		out of TEST			As above		Unsquelch to occur at
need to be
		quency to a conventional sys-		MODE; select					<0.25 ∝V.
tested)
		tem. Raise RF level from zero		a conventional					Preferred SINAD =
		until radio unsquelches.		system					6-9 dB

*. See Table 4-4

December 3, 2003 HKLN4215A