Alinco DJ-438, Руководство по обслуживанию

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4) TK14521MTL (XA0515)
IF System
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Ta = 25°C, Vcc = 3V, fin = 10.7MHz, fm = 1kHz, Mod = ±3kHz
Parameter
Symbol
Ratings
Unit Condition
Min Typical Max
Supply Current Icc 4.3 7.0 9.8 mA No signal
Mixer + IF part
Limiting Sensitivity Limit -94
-100 -106 dBm -3.0dB point
Output Voltage Vo 200 300 400 mVrms
Distortion THD
0.8 2.8 %
S/N
S/N 40 46
52 dB
AM Rejection Ratio AMRR 30
40 dB AM 30% mod
Mixer Coversion Gain G
m
20 26
32
dB
Mixer 3rd Intercept point
ICP -10 -3 dBm
Mixer Input Impedance
R
im
2.8 3.6
4.4
K n
DC Test
Mixer Output Impedance R
om
1.2 1.5 1.9
K n
DC Test
Limiter Input Impedance
R
i f i n
1.2 1.5 1.9
K n
DC Test
RSSI part
RSSI Output Current 1
I
r s s i
1
41 60
38
ma
-30dBm is input.
RSSI Output Current 2
I
r s s i
2
22 40 59 pA -60dBm is input.
RSSI Output Current 3
I
r s s i
3
10 17 25 pA -100dBm is input.
Squelch BPF part
Center Frequency 1
f C T
1 10.5 15.0 21.0 kHz Center frequency setting R»«>
Center Frequency 2
f C T 2
21.0
30.0 39.0 kHz
Center frequency setting R«36kQ
Center Frequency 3
( C T 3
38.5 55.0 71.5 kHz
Center frequency setting R=6.Bkn
Squelch Output Current Iso 6 10 18 pA
Center frequency setting R«36k£2
25mVrms is input (Pin11)
Squelch ON Voltage
V S O (O N )
0.40 0.47
0.54
V
DC voilage is input io pinl 3.
Squelch O FF Voltage VSQfOFF) 0.50
0.57
0.64
V
DC voltage is input to pinl 3.