Samsung GBP32ASA, Service Manual

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13 Circuit Descriptions
13-4
3. General Characteristics
3-1 Temperature Range
Storage Temperature : -20 ~ +80
Operation Temperature : 0 ~ +65
3-2 Test conditions : All data hold under following conditions
T(amb.) : +25 2 / Humidity : 45 ~ 65 % RH
Supply voltage(5V) : +5V 2%
Supply voltage(9V) : +9V 2%
Tuning voltage (BT) : +30V 2%
Supply voltage(3.3V) : +3.3V 2%
3-3 Current Consumption
Supply Voltage (5V) : Typ 210mA, Max 240mA
Supply Voltage (9V) : Typ 40mA, Max 70mA
Tuning Voltage(30V) : Max 2mA
Supply Voltage(3.3V) : Max 240mA Max 260mA
4. Electrical Characteristics ( RF block & Digital Demodulation )
4-1 Input Frequency Range
Analog VHF-Low Band : 48.25MHz ~ 168.25MHz
VHF-High Band : 175.25MHz ~ 463.25MHz
UHF Band : 471.25MHz ~ 855.25MHz
DVB-T VHF-High Band : 174(177.5)MHz ~ 230(226.5)MHz
UHF Band : 470(474)MHz ~ 862(858)MHz
4-2 Input Signal Level : -80dBm ~ -10dBm (AveragePower, 64QAM, 2/3CR)
4-3 Voltage Gain
1st IF : 40dB typ. 38dBmin.
4-4 Noise Figure
1st IF : 4.5dB typ. 6.5dB max. (at max. gain)
4-5 OFDM-Demod IC : MT5131 (produced by MediaTek)
4-6 Input Impedance : 75
4-7 RF Input/Output Return Loss : -8dB typ. -6dB min.
4-8 IF Frequency
1) Digital center frequency : 36.125MHz
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 Spurious Signals at Input Terminal
Local Oscillator Leakage : 46dBuV max.
4-10 Reference Frequency
The X-tal for the RF block's PLL : 4MHz