align procedure

FCC ID: QH9T125003

Parts List/Tune Up Info

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FCCID_348597

RF—501F Adjustment Manual 1, Equipment 1—1 Standard Crystal 75.690MIz 1—5 Frequency cotmter 1—2 Cirguit Board Checker 1—6 RNC—BNC Cable 1—3 Power Supply 1—7 RF Circuit Board 1—4 DIN—DIN Cable 2,Preparation 2—1 Power supply Power Switch "OFF" and commect AC L1NE 2—2 Connect Cirouit Board Checker and Power Supply. , 2—3 Connect Circuit board Checker and Frequency countcr.(Usc BNC—BNC Cable) 2—4 Power Supply Volinge Switch is "12V". 25 Power Supply Power Switch "ON". 3,Power Adjustment 3<1 Standard Crystal in Cireuit board socket. 3—2 Circuit Board on Circuit Board Checker. 3—3 "Tl" 2—3 tun down. 3—4 Adjust "T2" (AMP Meter is Max) 3—5 Adjust "T3" (AMP Meter is Max) 3—6 Adjust "T1" (AMP Meter is Max) 3—7 Adjust "T1","T2","T3"(Repeat :Power Meter Max) 3—& Coil "LZ" isn‘t Adjustwent 3—9 Adjust "L1" (Power Méter Max) 3—10 repeat. 3—7 ~9.Adjument done. 4, Frequency Adjustment 4— 1 Modulation switch select "LHGL" 42 Adjust "VR1". Frequency Counter is "75.601800MHz" 4— 3 Modulation switch select "Low" 4— 4 Adjust "VR2". Frequency Counter is "75.688300M42z" 4— 5 repeat "4—14—4" .2 times. 4— 6 Notice ;If frequency unstable counted, don‘l adjust and wait J Frequency counter need warming up, at least hour. 5,Frequency 75MHz 75.690MHz H 75.691700MHz +200Hz . L 75.688300MHz +200Hz EX—10 Helion 75MHz


Document Created: 2019-09-04 22:52:34
Document Modified: 2019-09-04 22:52:34
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