http://www.luguang.cn email: lge@luguang.cn shenzhen luguang electronic technology co.,l td . 1 1. scope this specification shall cover the characteristics of the ceramic filter with 10.7mhz for fm receiver. 2. specification no: 3. part number: lt10.7ma19 4. electronical characteristics a. 3db and width (khz) 350 min b. 20db and width (khz) 950 max c .insertion loss (db) 3.02.0max. d. spurious attenuation ( 9 12mhz) (db) 20 min. e. temperature coefficient of center frequency(-20 to +80 ) 50ppm/ max f. standard rule : table 1 center frequency d 10.64mhz 30khz b 10.67mhz 30khz a 10.70mhz 30khz c 10.73mhz 30khz e 10.76mhz 30khz color black bule red orange white 5. measurement a. measurement shall be carried out at the reference temperature of 25 2 . it shall be possibly done at 15 to 35 unless it is questionable. b. test circuit (including stray capacitance and input capacitance of rf voltmeter)
http://www.luguang.cn email: lge@luguang.cn shenzhen luguang electronic technology co.,l td . 2 6. dimensions(mm) 7. environmental characteristics 7-1 igh temperature exposure subject the fitter to +80 for 24 hours. then release the filter into room condition for 4 hours prior to measurement , it shall fulfill the the specifications in table 2. 7-2 moisure keep the filter at 40 and 95%rh for 24 hours, then release the filter into the room conditions for 2 to hours prior to the measurement. it shall fulfill the specifications in table 2. 7-3 low temperature subject the filter to -20 for 24 hours. then release the filter into the room conditions for 4 hours prior to the measurement. it shall fulfill the specific ations in table 2. 7-4 temperature cycling subject the filter to alow temperature of -20 for 30 minutes. followsing by a high temperature of +80 for 30 minutes. then release the filter into the room conditions for 1 to 2 hours prior to the mesurement. it shall meet the specifications in table 2. 7-5 resistance to solder heat dip the filter terminals no closer than 1.5mm into the solder bath at 260 10 for 5 0.5 sec. then release the filter in to the room conditions for24 hours. the filter shall m eet the specifications in table 2. 7-6 mechanical shock drop the fil ter random ly onto the concrete floor fr om the height of 1 meter 3 times. it shall fulfill the specifications in table 2.
http://www.luguang.cn email: lge@luguang.cn shenzhen luguang electronic technology co.,l td . 3 7-7 vibration subject the filter to vibration ea ch in x,y and z axes with the amplitude of 1.5mm for2 hours each directi on , the frequency shall be varied uniformly between the limits of 10 to 50h z, then release the filter into room condition for 2 hours prior to the measurem ent. it shall fulfill specifications in table 2 7-8 solderabllity dip the filter terminals no closer then 2 mm into the solder bath at 2355 for 20.5sec. more then 95% of the te rminal surface of th e fllter shall be covered with fresh solder. 7-9 lead fatigue 7-9-1 pulling test weight along with the directi on of lead without an shock 0.5 kg. the filter shall satisfy all th e initiall characteristics. 7-9-2 bending test lead shall be subject to withstand against 90 bending in the derection of thickness. this opera tion shall be done toward both direction.the fil ter shall show noevidence of damage and shall satisfy all the initial electric al characteristics table 2 item limit valae center frequency change 0.5% max insertion loss (db) 0.5 db max 8 review of specification when something gets doubtful with this specification , we shall jointly work to get an agreement.
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