28.1.1999
Xo0245e4_fm5.fm
5
Product: LIF-40 (Line Interface) / YO0245
10.1.3.3 Connectors
X120
X121
10.1.3.4 Audio
The audio unit consists of operation amplifiers I100C and I100D and their peripheral
components. The low-frequency alternating current passing through the two-wire
data terminal is formed by a current coming from the I100D output through resistor
R109 (signal received by the data terminal) and by a current coming through resistor
R109 to I100C (signal transmitted by the data terminal). R109/C111 is used for gen-
erating the line impedance appropriate to the data terminal.
The -3 dBm level (549 mVrms / 600 ohm) causes a 400 mVrms voltage in the EXT-
MIC line and a ±3 kHz deviation in the transmitter. Likewise, the ±3 kHz deviation in
the receiver causes a 400 mVrms voltage in the EXTERP line and a -16 dBm level
(123 mVrms / 600 ohm) in the data terminal.
10.1.3.5 Basic Frequencies
Components R114, R115, C109 and I105 form an oscillator vibrating at a frequency
of approx 220 kHz. This frequency is divided within I105 into frequencies 430 Hz
(free/reserved tone) and 26 Hz (ring frequency).
10.1.3.6 Switched Mode Voltage Converter
The basic chopper connection consists of operation amplifier I100A, quad NAND
I101, MOSFET Q100, and coil L100. Saw wave to the I101A input pin 2 is generated
from the basic frequency 220 kHz by using resistor R131 and capacitor C121. By
changing the dc-level of the saw wave, the operation amplifier I100A controls the
pulse width at gate Q100.
An extended width pulse from the basic frequency is brought to the I101A input pin 1
in order to make sure that the MOSFET is led to be momentarily non-conductive in
every cycle.
1
EXTMIC
MIC input for hand-portable
400 mVrms
2
GND
Signal ground
3
EXTERp
ERP output from hand-portable
200 mVrms
4
VBAT
NiCd battery voltage
7.2 V
5
I2CDAT
I2C-connection data line
0/5 V
6
I2CCLK
I2C-connection clock line
0/5 V
7
I2CINT
I2C-connection interrupt
0/5 V
1
LB
Two-wire connection to data terminal
2
LA
Summary of Contents for DELTA TDP-40-TN2
Page 1: ...28 1 1999 Tdp40enTOC fm 1 Product TDP 40 TN2 Delta SERVICE MANUAL BENEFON DELTA TDP 40 TN2 ...
Page 16: ...1user_gb fm 1 2 0 OWNER S MANUAL ...
Page 46: ...28 1 1999 TDP 40E7_fm5 fm 1 Product TDP 40 TN2 6 0 PHONE S CONSTRUCTION ...
Page 77: ...28 1 1999 XA0300E4_fm5 fm 32 Product TDP 40 TN2 Delta OA0300 ...
Page 78: ...28 1 1999 XA0300E4_fm5 fm 33 Product TDP 40 TN2 Delta OA0300 ...
Page 79: ...28 1 1999 XA0300E4_fm5 fm 34 Product TDP 40 TN2 Delta OA0300 ...
Page 80: ...28 1 1999 XA0300E4_fm5 fm 35 Product TDP 40 TN2 Delta OA0300 ...
Page 81: ...28 1 1999 XA0300E4_fm5 fm 36 Product TDP 40 TN2 Delta OA0300 ...
Page 90: ...28 1 1999 XS030ZE4_fm5 fm 45 Product TDP 40 TN2 Delta OS0320 Solder Side Layout PS0300A1 ...
Page 96: ......
Page 97: ......
Page 98: ......
Page 103: ...28 1 1999 XQ0300E4_fm5 fm 58 Product TDP 40 TN2 Delta OQ0300 Regulator ...
Page 106: ...28 1 1999 XT0300E4_fm5 fm 61 Product TDP 40 TN2 Delta OT0300 Antenna Switch ...
Page 111: ...28 1 1999 XO0300E4_fm5 fm 66 Product TDP 40 TN2 Delta PO0403 ...
Page 112: ...28 1 1999 8HAR_GB fm 1 7 0 CHARGING CHARGING ...
Page 115: ...28 1 1999 XO0244E4_fm5 fm 4 Product HPT 40 Desktop Charger YO0244 7 3 DESKTOP CHARGER YO0244 ...
Page 128: ...28 1 1999 XO0244E4_fm5 fm 17 Product HPT 40 Desktop Charger OO0244 ...
Page 129: ...28 1 1999 XO0244E4_fm5 fm 18 Product HPT 40 Desktop Charger OO0244 ...
Page 139: ...28 1 1999 Xo0314e4_fm5 fm 10 Product CIU 40 Carbox OW0314 The Top Side Layout PW0314A1 ...
Page 140: ...28 1 1999 Xo0314e4_fm5 fm 11 Product CIU 40 Carbox OW0314 The Bottom Side Layout PW0314A1 ...
Page 141: ...28 1 1999 Xo0314e4_fm5 fm 12 Product CIU 40 Carbox OW0314 ...
Page 142: ...28 1 1999 Xo0314e4_fm5 fm 13 Product CIU 40 Carbox OW0314 ...
Page 143: ...28 1 1999 Xo0314e4_fm5 fm 14 Product CIU 40 Carbox OW0314 ...
Page 144: ...28 1 1999 Xo0314e4_fm5 fm 15 Product CIU 40 Carbox OW0314 ...
Page 145: ...28 1 1999 Xo0314e4_fm5 fm 16 Product CIU 40 Carbox OW0314 ...
Page 146: ...28 1 1999 XMOO24E4_fm5 f 17 Product HDH 40 Phone holder YM0024 8 2 PHONE HOLDER YM0024 ...
Page 147: ...28 1 1999 XMOO24E4_fm5 f 18 Product HDH 40 Phone holder PO0243 Component Side Layout PO0243 ...
Page 148: ...28 1 1999 XMOO24E4_fm5 f 19 Product HDH 40 Phone holder PO0243 Solder Side Layout ...
Page 149: ...28 1 1999 XMOO24E4_fm5 f 20 Product HDH 40 Phone holder OO0343 module OO0343 module ...
Page 156: ...28 1 1999 8HDS50GB_fm5 f 27 Product HDS 50 Ext Handset With Cradle HLS 41 HDS 50 HXS 40 ...
Page 158: ...28 1 1999 8OSET_GB fm 1 9 0 OFFICE SET OFFICE SET ...
Page 172: ...28 1 1999 8dds40gb_fm5 fm 15 Product DDS 40 Office set OO0300 ...
Page 173: ...28 1 1999 8dds40gb_fm5 fm 16 Product DDS 40 Office set OO0300 ...
Page 174: ...28 1 1999 8dds40gb_fm5 fm 17 Product DDS 40 Office set OO0300 ...
Page 176: ...28 1 1999 8dds40gb_fm5 fm 19 Product DDS 40 Office set OO0301 ...
Page 178: ...28 1 1999 8dds40gb_fm5 fm 21 Product DDS 40 Office set OO0302 ...
Page 179: ...28 1 1999 8dds40gb_fm5 fm 22 Product DDS 40 Office set OO0302 ...
Page 186: ...28 1 1999 8hxs40gb_fm5 fm 29 Product HXS 40 External Handset HLS 41 HDS 50 HXS 40 ...
Page 187: ...28 1 1999 8OTHE_GB fm 1 10 0 OTHER ACCESSORIES OTHER ACCESSORIES ...
Page 199: ...28 1 1999 Xo0245e4_fm5 fm 13 Product LIF 40 Line Interface OO0245 Solder Side Layout PO0245A0 ...
Page 200: ...28 1 1999 Xo0245e4_fm5 fm 14 Product LIF 40 Line Interface OO0245 ...
Page 201: ...28 1 1999 Xo0245e4_fm5 fm 15 Product LIF 40 Line Interface OO0245 ...
Page 202: ...28 1 1999 Xo0236e4_fm5 fm 16 Product DB 40 Branching Unit YO0236 10 2 BRANCHING UNIT YO0236 ...
Page 208: ...28 1 1999 Xo0236e4_fm5 fm 22 Product DB 40 Branching Unit OO0241 ...