Spectrum Analyzer - K-ICT 스펙트럼 Map

1 Spectrum Analyzer 21. ( Spectrum Analyzer ) ( Spectrum Analyzer ) ? - ( Spectrum Analyzer ) . < > Spectrum Analyzer . , Spectrum Analyzer FFT Analyzer (Fast Fourier Transform Analyzer ) , FFT Analyzer 100kHz . Spectrum Analyzer Heterodyne . ( Spectrum Analyzer ) - Spectrum Analyzer . Spectrum Analyzer . (C/N, S/N Ratio) (Distortion Measurement) (Inter Modulation) (Harmonic) FM (Spurious) , 3 ( Spectrum Analyzer ) - Spectrum Analyzer Mixer.

2 (mixing) (IF) . IF IF Amp . IF Spectrum Analyzer . (sharp) . Log( Linear) . Spectrum Analyzer ( ) , EMC (electro magnetic compatibility, ) . Vertical Scale Factor(A/D ) . Display CRT .o RF input attenuator : mixer o Mixer : o Local oscillattor : mixer o IF gain : o IF filter : (BPF)o Log Amp : o Detector : o Video filter : o CRT display : 4 ( Spectrum Analyzer ) - Spectrum Analyzer .

3 (Dynamic Range) . Spectrum Analyzer . Spectrum Analyzer . Spectrum Analyzer . Spectrum Analyzer . DC DC . Dynamic Range ? - Dynamic Range .. Spectrum Analyzer Dynamic Range . Spectrum Analyzer Dynamic Range , . -1 - Spectrum Analyzer 1st Mixer RF Step Attenuator . 1st Mixer -30dBm . Analyzer Mixer . RF Step Attenuator Mixer.

4 -10dBm 20dB -30dBm . Attenuator .5 Mixer (Distortion) (Spurious) . Analyzer . ( Spectrum Analyzer ) - ( Spectrum Analyzer ) 3 . (Reference Level) (Frequency) (Span) Spectrum Analyzer 3 , , Spectrum Analyzer . -1 (Reference Level) - .. -10dBm , -10dBm . ( ), ( ) . -10dBm, 10dB/Div , ( ) 2 30dBm.

5 RF IF . Spectrum Analyzer 2 , . Spectrum Analyzer . Analyzer 1st Mixer (-30dBm) . +10dBm -60dBm , 1st Mixer (-30dBm) 40dB +10dBm . +10dBm ( scale : 10dB/Div ) 7 . Analyzer .6 Spectrum Analyzer Analyzer , (Span/Div, Max Span) .. -2 (Frequency) - Spectrum Analyzer (Local Oscillator) (Mixing Circuit).

6 (1st LO) Span 1st LO Sweep , (RBW) . Sweep . (Center Frequency) . , . (Start Frequency) . (Frequency) (Center Frequency), (Start Frequency) . -3 (Span) - Span Sweep . Span (KHz MHz) . ( ) 10 Span CRT (Total Frequency) . 20 MHz Span Sweep 20 MHz/10 CRT Div 2 MHz . Span Full Span( ) Zero Span( ) .7 (RBW : Resolution Bandwidth).

7 (IF Filter) (Band Pass Filter,BPF) , .. (RBW) . , . 30 , RBW 100 100 . 30 RBW . , , RBW . , Sweep time . (Video Bandwidth) - . RBW VBW (Smooth) . Video Fiter , (Low Pass Filter, LPF) .8 . VBW ( VBW ).

8 VBW . VBW , . (RBW) Noise Level - (Random) RBW . RBW RBW . [ ] RBW 10 10 10 .Noise Level RBW . ( ) = log RBW 100 (RBwold) 10 (RBWnew) Noise Level . = log = -10 RBW 10 10.