http://www.luguang.cn email: lge@luguang.cn shenzhen luguang electronic technology co.,l td . 1 1. scope this specification is applied to the ceramics discriminator used with the type jt10.7mg18 for fm receiver. pl ease contact us before using any of the products in the app lications not described above. 2. part no.: part number customer part no specification no jt10.7mg18 3. outline drawing and dimensions: appearance: no visible damage and dirt. construction: leads are soldered on electrode and body is molded by resin. dimensions: color j10.7g unit mm
http://www.luguang.cn email: lge@luguang.cn shenzhen luguang electronic technology co.,l td . 2 4. electrical specifications: no item requirements 4.1 center frequency fo (mhz) a 10.700 0.030 (red) 4.2 recovered audio voltage (at fo) (mv) min 60 4.3 distortion (at fo) (%) max 0.9 4.4 recovered audio 3db bandwidth (khz) min 300 4.5 temp. coefficient of frequency (ppm/ ) max 100 center frequency drift -10 +70 4.6 insulation resistance ri,(m )min 100 (100v 1min) 4.7 withstanding voltage 50vdc, 1min 5. measurement: measurement conditions: parts sha ll be measured under a condition ( temp. 2015 ,humidity 6520% r.h.) unless the standard condition(temp. 252 ,humidity 655% r.h.) is regulated to measure. test circuit:
http://www.luguang.cn email: lge@luguang.cn shenzhen luguang electronic technology co.,l td . 3 input signal input level 80db v modulation frequency 1000hz frequency deviation 22.5khz center frequency fo : center frequency is measured under the condition that modulated and 80db v input signal center is supplied and varied its frequency. it is defined as the frequency at that d.c.output volta ge shall correspond to that for 0db v input signal. recovered audio voltage: it is defined as the recovered audio voltage at center frequency fo . distortion: it is defined as the distortion at center frequency fo . recovered audio 3db bandwidth: it is defined as the difference between the two frequencies wher e the recovered audio voltage 3db from the level of center frequency fo . 6. physical and environmental characteristics no item condition of test performance requirements 6.1 humidity subject the discriminator at +40 2 and 90%-95% r.h. for 100 hours, discriminator shall be measured after being placed in natural conditions for 1 hour. it shall fulfill the specifications in table 1. 6.2 high temperature exposure subject the discriminator to +85 5 for 100 hours, discriminator shall be measured after being placed in natura l conditions for 1 hour. it shall fulfill the specifications in table 1. 6.3 low temperature exposure subject the discriminator to ?25 5 for 100 hours, discriminator shall be measured after being placed in natura l conditions for 1 hour. it shall fulfill the specifications in table 1. 6.4 temperature cycling subject the discriminator to 25 for 30 min. followed by a high temperature of 85 for 30 min. cycling shall be repeated 5 times. discriminator shall be measured after being placed in natura l conditions for 1 hour. it shall fulfill the specifications in table 1.
http://www.luguang.cn email: lge@luguang.cn shenzhen luguang electronic technology co.,l td . 4 6. physical and environmental characteristics (continued from the preceding page) no item condition of test performance requirements 6.5 vibration subject the discriminator to vibration for 2 hours each in x y and z axis with the amplitude of 1.5mm, the frequency shall be varied uniformly between the limits of 10hz-55hz and then discriminator shall be measured. it shall fulfill the specifications in table 1. 6.6 mechanical shock discriminator shall be measured after 3 times' random dropping from the height of 100cm on concrete floor. no visible damage and it shall fulfill the specifications in table 1. 6.7 resistance to soldering heat lead terminals are immersed up to 2 mm from discriminator?s body in soldering bath of 260 5 for 5 1 seconds and then discriminator shall be measured after being placed in natural conditions for 1 hour it shall fulfill the specifications in table 1. 6.8 solderability lead terminals are immersed up to 2mm from discriminator?s body in soldering bath of 250 5 for 2 0.5 sec. more than 95% of the terminal surface of the discriminator shall be covered with fresh solder. 6.9 6.9.1 6.9.2 terminal strength terminal pulling terminal bending force of 5n is applied to each lead in axial direction for 10 1 sec. when force of 5n is applied to each lead in axial direction, the lead shall folded up 90 from the axial direction and folded back to the axial direction. the speed of folding shall be each 3 seconds. no visible damage and it shall fulfill the specifications in table 1. table 1 item specification after test center frequency drift 30khz max recovered audio voltage drift 2db max note the limits in the above table are refe renced to the initial measurements.
http://www.luguang.cn email: lge@luguang.cn shenzhen luguang electronic technology co.,l td . 5 7. .review of specifications when something gets doubtful with this specifications, we shall jointly work to get an agreement. 8. package to protect the products in storage and transportation it is necessary to pack them outer and inner package .on paper pack, the following requirements are requested. a) dimensions and mark at the end of package, the warning (moisture proof, upward put) should be stick to it. dimensions and mark (see below) no. name quantity notes 1 inner box 40 2 box 2 3 package 1 4 adhesive tape 1.2m 5 label 1 6 belt 2.9m 7 certificate of approval 1
http://www.luguang.cn email: lge@luguang.cn shenzhen luguang electronic technology co.,l td . 6 b) section of package package is made of corruga ted paper with thickness of 0.8cm.package has 2 inner boxes, e ach has 20 inner boxes (each box for plastic bag). c) quantity of package per plastic bag 500 pieces per inner box 3 plastic bag per package 40 inner boxes 60000 pieces of piezoelectric ceramic part d) inner box dimensions 1 label 2 qc label 3 inner box pars shall be packaged in box with hold down tape upside. part no., quantity and lot no. 1.unit: mm
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