— 74 —
DTMF Output (600
Ω
load)
a. Minimum Level On Single Tone
Low Group
dBm
−
7
>
−
10
High Group
dBm
−
5
>
−
8
b. DTMF Level
dBm
−
3
< 0
c. DTMF Frequency
Row 1
Hz
697
687 ~ 707
Row 2
Hz
770
759 ~ 781
Row 3
Hz
852
840 ~ 864
Row 4
Hz
941
927 ~ 955
Column 1
Hz
1209
1191 ~ 1227
Column 2
Hz
1336
1316 ~ 1356
Column 3
Hz
1477
1455 ~ 1499
d. Signal Length
msec
100
> 90
e. Interdigital Pause
msec
100
> 80
Speaker Phone
Microphone Sensitivity (
−
20 dBm TEL Output)
mV
1.4
0.8 ~ 2.3
Receiver Response Audio Out (Audio Output at
−
30 dBm TEL Input)
mV
430
270 ~ 690
Intercom
Microphone Sensitivity (1 kHz ±8 kHz Dev.)
mV
2.6
1.6 ~ 4.2
Receiver Response Audio Out (1 kHz ±4 kHz Dev.)
mV
550
340 ~ 880
Handset Unit
Receiver
Unit
Nominal
Limit
Sensitivity 12 dB SINAD (CCITT Filter ON)
dBm
−
115
<
−
107
Frequency Response
0.3 kHz
dB
1
−
3 ~ +5
3.0 kHz
dB
−
7
−
11 ~
−
3
Audio Output Level
mV
60
42 ~ 85
Distortion at 1 mV RF Input
%
1.5
< 5
S/N ratio at 1 mV RF Input (CCITT Filter ON, Compander ON)
dB
70
> 60
Selectivity (NQ20dB)
6 dB Bandwidth
−
kHz
15
> 10
6 dB Ban
kHz
15
> 10
Bell Ringer Level at 30 cm from Speaker
(Frequency:2.0 kHz + 2.2 kHz)
dBSPL
84
> 75
Intercom Ringer Level at 30 cm from Speaker
(Frequency: 2.0 kHz)
Called from Base Unit
dBSPL
82
>75
(Frequency: 1.0 kHz)
Call To Base Unit
dBSPL
70 HI LEVEL
−
12 dB ±3 dB
Содержание FT-8508
Страница 1: ...SERVICE MANUAL PUBLISHED IN JAPAN Jun 1998 FILE NO 2B0 9804 FT 8508 CORDLESS TELEPHONE ...
Страница 3: ... 2 OPERATING CONTROLS BASE UNIT CONTROLS HANDSET CONTROLS RS YZ 1 2 ...
Страница 10: ...Handset Main 9 BLOCK DIAGRAMS ...
Страница 11: ...Handset RF 10 ...
Страница 12: ...Base RF 11 ...
Страница 13: ...Base Main 12 13 ...
Страница 14: ...SCHEMATIC DIAGRAMS Base Main 14 15 ...
Страница 15: ...Base RF 16 17 ...
Страница 16: ...Base Key 18 19 ...
Страница 17: ...Handset Main 20 21 ...
Страница 18: ...Handset RF 22 23 ...
Страница 36: ...Base Main 41 ELECTRICAL PARTS LOCATION ...
Страница 37: ...Base RF 42 ...
Страница 38: ...Base Key 43 ...
Страница 39: ...Handset Main 44 ...
Страница 40: ...Handset RF 45 ...
Страница 41: ...Base 46 WIRING DIAGRAMS ...
Страница 42: ...Handset 47 W501 W 072147 J502 JK 736 9P J601 IC603 PORTABLE RF B501 PE1294DA TOP VIEW SOLDERING ...
Страница 71: ...MECHANICAL PARTS LIST ...