參數(shù)資料
型號(hào)： AN1500A
廠商： SAMES
英文描述： SINGLE CHIP TELEPHONE DEMO BOARD
中文描述： 單芯片電話演示板
文件頁(yè)數(shù)： 6/27頁(yè)
文件大?。?/td> 623K
代理商： AN1500A
AN1500A
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
. 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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