Base Unit - Toshiba FT-8981 Service Manual

BASE UNIT

RECEIVER
1. Sensitivity 12 dB SINAD (with CCITT Filter)
2. Frequency Response (Ref: 1 kHz)
3. Distortion at 1 mV RF Input
4. S/N ratio at 1 mV RF Input (with CCITT Filter)
5. Selectivity (NQ20dB)
6. Image Rejection Ratio (SINAD 12dB with CCITT Filter)
7. Telline Output Level (600 Ω load)
8. Ringer level at 30cm from Speaker (Bell input: Volume Hi)
(Ringer Frequency: 1000 Hz + 500 Hz)
TRANSMITTER
1. RF Power (50 Ω Load)
2. Modulation Sensitivity Telline Input
3. Frequency Response (Ref: 1 kHz)
4. TX Frequency Tolerance (25 °C)
5. Code Deviation
6. Distortion
7. Adjacent CH Power
8. S/N Ratio (with CCITT Filter )
TELEPHONE LINE
1. Off-hook Impedance (at 1 kHz)
2. Off-hook DC Resistance (DC 40.0 mA)
3. On-hook Impedance (at 20 Hz, 75 Vrms)
4. Minimum Ringer Input Level (at 20 Hz)
TELEPHONE DIAL UNIT
1. Pulse Dialing
a. Dialing Rate
b. Make Ratio
2. DTMF Dialing (600 Ω load)
a. DTMF Frequency
b. Signal Level of Dual Tone
c. Signal Length
d. Interdigital Pause
0.3 kHz
3.0 kHz
6 dB Bandwidth −
6 dB Bandwidth +
1st Image
2nd Image
0.3 kHz (input)
3.0 kHz (input)
(+)
(−)
Row 1
Row 2
Row 3
Row 4
Column 1
Column 2
Column 3
— 50 —
Unit Nominal
−115
dBm
−5.0
dB
−8.0
dB
% 1.5
dB 75
kHz 15
kHz 15
dB 35
dB 55
−12.0
dBm
dBspl 85
−6.0
dBm
−15.0
dBm
−3.0
dB
dB +4.5
±0
Hz
kHz 9.0
% 1.5
dB 55
dB 55
dB 40
ohm 1000
ohm 250
kohm 25
Vrms 30
pps 10
% 39
Hz 697
Hz 770
Hz 852
Hz 941
Hz 1209
Hz 1336
Hz 1477
−3.0
dBm
mSec 120
mSec 120
Limit
< −107
−9.0 ~ −1.0
−12.0 ~ −4.0
< 5.0
55 <
10 <
10 <
30 <
30 <
−15.0 ~ −9.0
75 <
−9.0 ~ −3.0
−19.0 ~ −11.0
−7.0 ~ 1.0
0.5 ~ 8.5
< ±2500
< 12.0
< 5.0
50 <
50 <
30 <
500 ~ 1500
100 ~ 300
10 <
< 40
8 ~ 11
36 ~ 42
687 ~ 707
759 ~ 781
840 ~ 864
927 ~ 955
1191 ~ 1227
1316 ~ 1356
1455 ~ 1499
< 0
90 <
90 <