Toshiba FT-7807R, Руководство по обслуживанию

Страница: 49 / 52

— 50 —
BASE UNIT
RECEIVER Unit Nominal Limit
1. Sensitivity 12 dB SINAD
µ
V 0.6 1.5
2. Bandwidth at 6 dB down kHz 17 12
3. Frequency Response 0.3 kHz dB
−
3.5
−
7.5 ~ +0.5
3.0 kHz dB
−
5
−
9 ~
−
1
4. Distortion at 1 mV Input % 2 7
5. S/N ratio at 1 mV RF Input dB 66 60
TRANSMITTER
1. RF Power at 50
Ω
Load dBm
−
6
−
11 ~
−
1
2. Modulation Sensitivity (Tel Line Input
−
15 dBm) kHz Dev
±
3
±
2 ~
±
4.2
3. Frequency Response 0.3 kHz dB 0
−
4 ~ +4
3.0 kHz dB 0
−
4 ~ +4
4. Frequency Tolerance Hz
±
600
±
1500
TELEPHONE LINE
1. Off-hook Impedance (at 1 kHz) ohm 1000 230 ~ 1570
2. Off-hook DC Resistance (DC 40 mA) ohm 230 100 ~ 300
3. Minimum Ringer Input Level (at 20 Hz) Vrms 23 40
TELEPHONE DIAL UNIT
1. PULSE DIALING
a. Dialing Rate 10 pps pps 10 8 ~ 11
b. Make Ratio 10 pps % 40 36 ~ 42
2. DTMF DIALING
a. 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
b. Signal Level on Single Tone
Low Group dBm
−
7 >
−
10
High Group dBm
−
5 >
−
8
c. High Group Component/ dB 2 0 ~ 4
Low Group Component Difference