— 73 —
Base Unit
Receiver
Unit
Nominal
Limit
Sensitivity 12dB SINAD
(CCITT Filter ON)
dBm
−
115
<
−
107
Frequency Response
0.3 kHz
dB
−
0.5
−
4.5 ~ +3.5
3.0 kHz
dB
−
6
−
10 ~
−
2
Distortion at 1 mV RF Input
%
1.5
< 5
S/N ratio at 1 mV RF Input (CCITT Filter ON, Compander ON)
dB
75
> 65
Selectivity (NQ20 dB)
6 dB Bandwidth
−
kHz
15
> 10
6 dB Ban
kHz
15
> 10
Tel out level
dBm
−
11
−
14~
−
8
Bell Ringer Level at 30cm from Speaker (Frequency: 1.0 kHz + 2.0 kHz)
HI
dBSPL
83
>75
LO
dBSPL
67 HI LEVEL
−
16dB±3dB
Intercom Ringer Level at 30cm from Speaker (Frequency: 1.0 kHz)
Called from Handset
dBSPL
75
>70
Call to Handset
dBSPL
59 HI LEVEL
−
16dB±3dB
Transmitter
RF Power (50 W Load)
dBm
−
6.5
−
9.5~
−
3.5
Modulation Sensitivity
dBm
−
22
−
26 ~
−
18
Frequency Response
0.3 kHz
dB
−
0.5
−
4.5 ~ +3.5
3.0 kHz
dB
−
1
−
5 ~ +3
Frequency Tolerance (25 °C)
Hz
0
±1500
Code Deviation
kHz
8
< 11
Distortion
%
1.5
< 5
S/N Ratio (CCITT Filter ON, Compander ON)
dB
40
> 35
Telephone Line
Off-hook Impedance (at 1 kHz)
ohm
1000
500 ~ 1500
Off-hook DC Resistance (DC 40 mA)
ohm
250
100 ~ 300
On-hook Impedance 20 Hz (75 Vrms)
kohm
25
> 10
Minimum Ringer Input Level
V
23
< 40
Pulse Dialing
a. Dialing Rate
10 pps
pps
10
8.0 ~ 11.0
b. Make Rario
10 pps
%
40
36 ~ 42
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 ...