摘要:
A multi-tuner apparatus comprises a splitter (S) for received RF signals. The splitter has a splitter output (U) for connection to a plurality of tuners. To reduce signal degradation and dissipation the output impedance of the splitter output is substantially lower than the input impedance of each of the tuners.
摘要:
A multi-tuner apparatus comprises a splitter (S) for received RF signals. The splitter has a splitter output (U) for connection to a plurality of tuners. To reduce signal degradation and dissipation the output impedance of the splitter output is substantially lower than the input impedance of each of the tuners.
摘要:
A receiver signal strength indication circuit comprises circuitry (A1-A4) for discretely controlled amplifying an input signal, and circuitry (NF, log, ADC) coupled to an output of the amplifying circuitry (A1-A4) for furnishing a receiver signal strength indication.
摘要翻译:接收机信号强度指示电路包括用于离散地控制放大输入信号的电路(A 1 -A 4)和耦合到放大电路(A 1 -A 4)的输出的电路(NF,log,ADC),用于提供 接收机信号强度指示。
摘要:
The invention relates to a device for determining the level of an input signal (101) intended to be applied to a receiving system (TUN), said receiving system (TUN) comprising arranged in series a set of discrete gain amplifiers (102-103-105-107), a selective filter (104), a mixer (106), said receiving system (TUN) being intended to deliver an output signal (108), said device comprising: measuring means (116) for measuring the level of said output signal (108) in a given frequency channel, means (120) for determining the real gain (G1) of said set of amplifiers (102-103-105-107) in said given frequency channel, means (121) for determining the real gain (G2) of said selective filter (104) in said given frequency channel, calculation means (122) for deriving the level of the input signal (101) from the level of the output signal (108), the real gain (G1) of said set of amplifiers (102-103-105-107) and from the real gain (G2) of said selective filter (104).