Ranger TR-127GK/DX service manual Transmitter Alignment T. Setting Adjust Measurement Point

4.1.2 TRANSMITTER ALIGNMENT

ITEM	U.U.T. SETTING	ADJUST	MEASUREMENT
		POINT
TX Power	Set radio to CH 19 AM TX mode.	L26, L27,	MAX > 4W
	Connect RF Power Meter to antenna jack.	L18	Balance Power
			Between CH. 1 - 40
AM TX Power	Set radio to CH 19 AM TX mode.	L14	3.8 W
RF Power
	Set radio to CH 19 AM TX mode.		For a needle reading
Meter	Set S/RF /SWR/CAL Switch to S/RF position.	VR5	of between green and
			red area on TX PWR
			scale.
AM TX	Set radio to CH 19 AM TX mode.		For a needle reading
Modulation	AF signal 30mV, 1 KHz to microphone.	VR4	of 90% on the
	Set MIC Gain fully clockwise.		external modulation
			meter.
ANT LED	Set radio to CH 19 AM TX mode.		Adjust very slowly
	Connect 150 ohms load to antenna jack	VR6	until ANT LED just
			light on.
4.1.3 RECEIVER ALIGNMENT
ITEM	U.U.T. SETTING	ADJUST	MEASUREMENT
		POINT
AM Sensitivity	Set radio to CH 19 AM RX mode.
	Set RF GAIN fully clockwise.	L4, L5,L6,L7,	Audio Output > 2V
	Set SQ fully counter-clockwise.	L8, L9,	S/N > 10 dB.
	Set VOL Control at 2 o’clock.	L20,L2, L3
	Connect RF SG to antenna jack	VR1
	Frequency 27.185 MHz, 1uV. Mod 30%.
	Set radio to CH 40 AM RX mode.
	RF SG setting 27.405 MHz.	L4,L5	For Balance Between
	Set radio to CH 1 AM RX mode.		CH 1 and CH 40.
	RF SG setting 26.965 MHz.
NB Adjust	Set radio to CH 19 AM RX mode
	RF SG setting 27.205 MHz,	L1	Adjust for max.
	100uV. Mod 30%.
	Set switch to NB position.
	Connect Oscilloscope to D1 cathode.
AM Squelch	Set radio to CH 19 AM RX mode.		Adjust very slowly
	Set SQ Control fully clockwise.	VR3	until squelch just
	RF SG setting 27.185 MHz, 1mV. Mod 30%.		closes.
AM S-Meter	Set radio to CH 19 AM RX mode.		For a reading of “9”
	RF SG setting 27.185 MHz, 100uV. Mod 30%.	VR2	on the “S” scale.

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