Agilent 35670A - Dynamic Signal Analyzer

Transcription

1 Agilent 35670A - Dynamic Signal Analyzer Two- or Four-channel high-performance FFTbased spectrum /network analyzer 122 µhz to khz 16-bit ADC United States: Price for 35670A from USD 18, A - Standard Features Instrument Modes FFT Analysis Histogram/Time Correlation Analysis Time Capture Measurement Frequency Domain? Frequency Response? Power Spectrum? Linear Spectrum? Coherence? Cross Spectrum? Power Spectral Density Time Domain (oscilloscope mode)? Time Waveform? Autocorrelation? Cross-Correlation? Orbit Diagram Amplitude Domain? Histogram, PDF, CDF Trace Coordinates Linear Magnitude Unwrapped Phase Log Magnitude Real Part db Magnitude Imaginary Part Group Delay Nyquist Diagram Phase, Polar 1

2 35670A - Frequency specifications (I) f c = Hz f h = Hz f h = 0.39 f c N = 4096 = 2 12 for 1600 lines display multiplexed channels f hmax /f hmin = frequency spans f = 122 µhz for f hmin = mhz 35670A - Frequency specifications (II) T FFT < N/RTB = 160 ms Accuracy (quartz clock) << f/fc = 1/N = 0.024% 2

3 35670A - Amplitude Specifications 35670A - Dynamic Range 3

4 35670A - Input noise 0.125% = 1/800; N = A - Time Domain µs = 1/262 KHz 4

5 35670A - Digital Interfaces 35670A - Digital Interfaces 5

6 Segnale sinusoidale periodico nel tempo di acquisizione Segnale sinusoidale non periodico nel tempo di acquisizione la potenza della fondamentale viene sparpagliata in tutto lo spettro: Leakage le righe vicine alla fondamentale non si vedono 6

7 Windowing No window With Hanning window, reduced leakage Finestra di Hanning Si utilizza per i segnali periodici e il rumore Non per i transitori Nessuna finestra con finestra di Hanning 7

8 Finestra Uniforme (o Rettangolare) Si usa per tutti i segnali di durata finita selfwindowed? Transitori? Impulsi? Treni di impulsi? etc. Finestra Flat-Top Si usa quando si vuol misurare in modo accurato l ampiezza dello spettro. Vediamo la finestra nel dominio delle frequenze come una serie di filtri passanda.? Finestra di Hanning: attenuazione di 1.5 db (16%) per frequenze a metà tra due righe.? Finestra Flat-Top: attenuazione di 0.1 db (1%) per frequenze a metà tra due righe La finestra flat-top consente una minore accuratezza in frequenza Finestra di Hanning Finestra Flat-Top f f 8

9 Altre Finestre Response window? transitori più lunghi del tempo di acquisizione Force window Agilent PSA series - E4440A E4440A PSA Series High- Performance Spectrum Analyzer, 3 Hz - 26 GHz Key Features and Specifications SPEED: The Industry's fastest lowlevel spur search ACCURACY: The Industry's most accurate spectrum analyzer DYNAMIC RANGE: The Industry's most useable dynamic range FLEXIBILITY: The Industry's finest resolution bandwidth settings The Industry's first phase noise optimization The Industry's most complete detector selection Product Price United States: Price for E4440A from USD 48,

10 Agilent PSA series block diagram 30 MSPS - 14 bit DAC 160 steps of RBW 2dB step attenuator 0-70 db 30 db gain preamplifier E444xA - Frequency specifications (I) 10

11 E444xA - Frequency specifications (II) Frequency span (FFT and swept mode) 0 Hz (zero span), 0 Hz to 26.5 GHz Resolution 2 Hz Accuracy ± 0.2% of span + span/600 Frequency sweep time Range 1ms to 2000 Zero span range 1µs to 6000s Resolution bandwidth 1 Hz to 3 MHz (10% steps), 4, 5, 6, 8 MHz Accuracy 1 Hz to 1.5 MHz (± 2.0%) typical 1.6 MHz to 3 MHz (± 7.0%) typical 4 MHz to 8 MHz (± 15%) typical Selectivity (60dB/3dB) 4.1:1 (nominal) Frequency sweep time >> Frequency span / (resolution bandwidth) 2 E444xA - Amplitude specifications Amplitude range [Measurement range: displayed average noise level (DANL) to maximum safe input level] Preamp (Option D5) DANL to +25 dbm Input attenuator range: 0 to 70 db n 2 db steps (to 26.5 GHz) Displayed average noise level (DANL) (input-terminated, 0 db attenuation, sample detector, normalized to 1 Hz RBW, 20 to 30 C) Pream off Pream on (500 khz to 3 GHz) 10 khz to 100 khz 130 dbm 100 khz to 1 MHz 135 dbm 1 MHz to 10 MHz 145 dbm 163 dbm 10 MHz to 1.2 GHz 155 dbm 169 dbm 1.2 GHz to 2.5 GHz 154 dbm 168 dbm 2.5 GHz to 3 GHz 153 dbm 168 dbm 3 GHz to 6.6 GHz 152 dbm 6.6 GHz to 3.2 GHz 150 dbm 3.2 GHz to 20 GHz 147 dbm 20 GHz to 26.5 GHz 143 dbm 11

12 Specifications (continued) ESA- L Series E4408B E4408B ESA-L Series Spectrum Analyzers, 9 khz to 26.5 GHz The Agilent ESA-L series of general-purpose, portable spectrum analyzer provides basic spectrum analysis, with the speed and accuracy you need. These affordable, fully synthesized analyzers are available in three frequency ranges: 1.5 GHz, 3.0 GHz and 26.5 GHz. Key Features and Specifications Four-millisecond sweep time ±1.1 db overall amplitude accuracy Large, high-resolution VGA display Rugged, portable, weather-resistant package Five-minute warm up Built-in help button Product Price United States: Price for E4408B from USD 23,

13 EE44xxB - Frequency specifications Frequency range E4411B 1 MHz to 1.5 GHz E4403B 9 khz to 3.0 GHz E4408B 9 khz to 26.5 GHz Frequency reference? Aging rate ± 2x10-6 /year, ±1.0x10-7 /day, characteristic? Settability ±5x10-7? Temperature stability ±5x10-6 Frequency span? E4411B 100 Hz to 1.5 GHz? E4403B 100 Hz to 3.0 GHz? E4408B 100 Hz to 26.5 GHz Resolution 2 Hz x N 2 Accuracy ±1% of span Frequency Specifications Sweep time? Range 4 ms to 4000 sec.? Accuracy ±1% Sweep (trace) points 401 Resolution bandwidth? Range ( 3 db bandwidth) 1 khz to 3 MHz in sequence and 5 MHz ( 6dB bandwidth) 9 khz and 120 khz Accuracy? 1 khz to 3 MHz RBW ±15%? 5 MHz RBW ±30% Selectivity 0 db/3 db bandwidth ratio <15:1, characteristic sweep time >> frequency range /(resolution bandwidth) 2 13

14 Amplitude specifications Absolute amplitude accuracy Overall amplitude accuracy ±(0.6 db +absolute frequency response(0.5 db)) Input attenuator range 0 to 65 db, in 5 db steps 1-dB gain compression (total power at input mixer) 50 MHz to 6.7 GHz 0 dbm 6.7 GHz to 13.2 GHz 3 dbm 13.2 GHz to 26.5 GHz 5 dbm Displayed average noise level? 10 MHz to 1.0 GHz 116 dbm? 1.0 GHz to 2.0 GHz 115 dbm? 2.0 GHz to 6.0 GHz -112 dbm? 6.0 GHz to 12.0 GHz 110 dbm? 12.0 GHz to 22.0 GHz 107 dbm? 22.0 GHz to 26.5 GHz 101 dbm 14