Samsung LE32R73BD Service Manual page 215

3. General Characteristics
3-1 Temperature Range
Storage Temperature :
Operation Temperature :
3-2 Test conditions :
T(amb.) :
Supply voltage(5V) :
Tuning voltage (BT) :
Supply voltage(3.3V) :
3-3 Current Consumption
Supply Voltage (5V) :
Tuning Voltage(30V) :
Supply Voltage(3.3V) :
4. Electrical Characteristics ( RF block & Digital Demodulation )
4-1 Input Frequency Range
VHF-Low Band :
VHF-High Band :
UHF Band :
4-2 Input Signal Level : -78dBm ~ -20dBm (Average power, 64QAM)
4-3 Voltage Gain
1st IF :
4-4 Noise Figure
1st IF :
4-5 OFDM-Demod IC : MT353 (produced by Zarlink)
4-6 Input Impedance :
4-7 RF Input/Output Return Loss : -8dB typ. -6dB min.
4-8 IF Frequency
1) Digital center frequency : 36.167MHz
2) Analog (PAL B/G, I, D/K, SECAM L/L')
Picture intermediate frequency :
38.9MHz(PAL B/G & SECAM L), 33.9MHz(SECAM L')
Sound intermediate frequency :
33.4MHz(B/G), 32.9MHz(I), 32.4MHz(D/K,SECAM L), 40.4MHz(SECAM L')
4-9 IF Response curve
1) Amplitude ripple in band (AGC Volt 4.0 ~ 0.8V) : ±3dB max.
Center¡¾4MHz ( Above 306MHz)
Center¡¾3.5MHz ( Below 300MHz)
2) 3dB bandwidth in band (AGC Volt 4.0 ~ 0.8V) for digital channel receiving
8MHz : The GPP3 port of the MT353 is high level.
7MHz : The GPP3 port of the MT353 is low level.
4-10 Spurious Signals at Input Terminal
Local Oscillator Leakage : 46dBuV max.
-20℃ ~ +80℃
0℃ ~ +65℃
All data hold under following conditions
+25±2℃ / Humidity : 45 ~ 65 % RH
+5V ± 2%
+30V ± 2%
+3.3V ± 2%
180mA Max.
5mA Max.
160mA Max.
47MHz ~ 174MHz
174MHz ~ 470MHz
470MHz ~ 862MHz
40dB typ. 38dBmin.
4.5dB typ. 6.5dB max. (at max. gain)
75Ω.
13 Circuit Descriptions
13-5