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AN1500A Datasheet(PDF) 6 Page - Sames |
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AN1500A Datasheet(HTML) 6 Page - Sames |
6 / 27 page AN1500A sames sames sames sames 6/27 7.1 Setting a/b line connection J1 allows selection of a/b line terminals to easily adapt the demo board to various PTT line connections: 7.2 Connecting a handset A handset connected at Z2 should have the following connections: remark: observe polarity of the electret microphone 7.3 Setting dialing mode By J2, a selection of 3 different dialing modes can be made, 2 pulse (=LD) dialing modes and a DTMF dialing mode. If LD Mode is selected then it is possible to switch into MF mode by pressing the ! key but the mode will return to LD after a hookswitch operation or after a Recall (flash). In LD mode pulsing is at 10 pulses per second. 7.4 Setting line loss compensation (AGC) Line loss compensation = line current dependent gain setting of Tx and Rx amplifiers can be set by jumper setting to 3 different modes : high, low and no LLC (=default). 7.5 AC impedance The Characteristic or output impedance of the SA2532K is set internally to 600 Ω. No further components are required. For a complex impedance refer to pt 11. inner two pins (default) outer two pins (optional) LD Mode make/break ratio 1:2 LD Mode make/break ratio 2:3 MF Mode LLC 45 to 75mA LLC 20 to 50mA no LLC Handset J2 J2 J2 J3 J3 J3 J1 J1 |
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Similar Description - AN1500A |
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