Motorola HT 1000 service manual Transmitter Performance Checks

Table 10 Transmitter Performance Checks

TEST	COMMUNICATIONS	RADIO	TEST SET	COMMENTS
NAME	ANALYZER
Reference	Mode: PWR MON	TEST MODE,	PTT to continuous	Frequency error to be < 150Hz.
Frequency	4th channel test frequency◊	4 CSQ	(during the
	Monitor: Frequency error		performance
	Input at rf In/Out.		check).
Power RF	As above.	As above, 4	As above.	Refer to Maintenance Specifica
		CSQ		tions page in front of manual.
Voice	Mode: PWR MON	As above, 4	As above, mete	Deviation:
Modulation ∆	4th channel test frequency◊	CSQ	selector to mic.	VHF, UHF, and 800MHz:
	atten to –70, input to RF In/Out,			≥ 3.6kHz but ≤ 5.0kHz.
	Monitor: DVM, AC Volts Set 1kHz
	Mod Out level for 0.025Vrms at test
	set, 80mVrms at AC/DC test set jack
Low-Speed	As above.	TEST MODE	PTT to continuous	Deviation:
Data Modulation		4TLS	(during the	UHF, 800MHz: ≥ 500Hz but
800/900 UHF		output at	performance	≤ 1000Hz.
		antenna	check).
Voice	Mode: PWR MON	TEST MODE,	Remove	Press PTT switch on radio.
Modulation	4th channel test frequency◊	4 CSQ,	modulation	Say “four” loudly into the
(internal) ∆	atten to –70, input to RF In/Out.	output at	input.	radio mic. Measure deviation:
		antenna.		VHF, UHF, and 800MHz:
				≥ 3.8kHz but ≤ 5.0kHz.
				900MHz: ≤ 2.5kHz.
High-Speed	As above.	TEST MODE,	PTT to continuous	Deviation:
Data		4 THS,	(during the	UHF and 800MHz:
Modulation***		output at	performance	≥ 2.4kHz but ≤ 3.6kHz.
		antenna.	check).	900MHz: ≥ 1.52kHz but ≤ 1.95kHz.
DTMF	As above,	TEST MODE,	As above.	Deviation:
Modulation	4th channel test frequency◊	4 DTMF,		VHF, UHF, and 800MHz:
		output at		≥ 3.05kHz but ≤ 3.45kHz.
		antenna.		900MHz: ≥ 1.5kHz but ≤ 1.9kHz.
PL/DPL	Change frequency to a	Conventional	As above.	Deviation:
Modulation	conventional transmit	coded squelch		VHF, UHF, and 800MHz:
(radios with	frequency, BW to narrow.	personality		≥ 500Hz but ≤ 1000Hz.
conventional,		(clear mode		900MHz: ≥ 250Hz but ≤ 500Hz.
clear mode,		operation).
coded squelch		4 TPL
operation only)		4 DPL
Talk-around	Change frequency to conventional	Conventional	As above.	Deviation:
Modulation	talk-around frequency.	talk-around		UHF and 800MHz: ≥ 3.8kHz
(radios with	Mode: PWR MON	personality		but ≤ 5.0kHz.
conventional,	deviation, attenuation to –70,	(clear mode		900MHz: ≥ 1.95kHz but
clear mode,	input to RF In/Out	operation).
talk-around	Monitor: DVM, AC volts	1 CSQ		≤ 2.45kHz.
operation only	Mod: 1kHz Out level for 25mVrms
	at test set.
Talk-around	Change frequency to conventional	Conventional	As above.	Deviation:
Modulation	talk-around frequency.	talk-around		UHF and 800MHz: ≥ 3.6kHz
(radios with	Mode: PWR MON	personality		but ≤ 4.4kHz.
conventional,	deviation, attenuation to –70,	(secure mode
secure mode,	input to RF In/Out	operation).
talk-around	Monitor: DVM, AC volts	Load key into
operation only	Mod: 1kHz Out level for 25mVrms	radio
(**)	at test set.	1 Sec.

*800 MHz radios only

**The secure mode, talk-around modulation test is only required for trac mode radios which do not have clearmode talk-around capability.

***Trunked Only

∆When testing voice modulation in the continuous mode, AGC must be disabled.

◊ See Table 6 or Table 8 as applicable.

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