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分析儀特性


失真度:
* Fundamental Frequency Range: 20Hz to 100kHz
* Residual Distortion and Noise (the higher of):
80 kHz BW: -80dB (0.01%) or 15μV， 20Hz to 20kHz
500kHz BW: -70dB (0.032%) or 45μV， 20Hz to 50kHz -65dB (0.056%) or 45μV， 50kHz to 100kHz
信噪比
交流電平
Full Range Display: 300V， 30V， 3V 0.3V， 30mV， 3mV， 0.3mV
直流電平
Full Range Display: 300V， 48V， 16V， 4V
頻率測量
* Measurement Range: 20Hz to 150kHz
* Resolution: 5 digits
標準音頻濾波器: 30kHz Low-Pass Filter 80kHz Low-Pass Filter
可編程低失真源特性:


Frequency Range: 20Hz to 100kHz
Output Level Range: 0.6mV to 6V open circuit
Distortion and Noise (the higher of):
80kHz BW: -80dB (0.01%) or 15μV， 20Hz to 20kHz
500kHz BW: -70dB (0.032%) or 38μV， 20Hz to 50kHz -65dB (0.056%) or 38μV， 50 to 100kHz
Impedance: 600 ohms or 50 ohms
The 8903A Audio Analyzer combines the capabilities of several instruments under microprocessor control to yield accurate and rapid characterizations of audio signals in the range of 20 Hz to 100 kHz. It contains an audio source， measures distortion， SINAD， signal-to-noise ratio， ac and dc level， and counts frequency completely auto-remote control.   This combination reduces the number of instruments and complexity of setup needed in many applications.


The analyzer is ideally suited for performing audio measurements on transceivers.   Along with a suitable signal generator and modulation analyzer， receiver sensitivity and transmitter distortion measurements can be made accurately and rapidly.


With the internal source and measurement functions enhanced by microprocessor control， the 8903A has more measurement capability and less display ambiguity than separate instruments.   The Audio Analyzer makes true rms measurements for ac level and distortion， thus assuring more accurate measurements of complex waveforms and noise.   The ability to perform swept measurements makes it an extremely versatile stand-alone bench instrument for general audio stimulus/responses work.   Its programmability over HP-IB is well suited to system applications.


無線電收發器測試


The Audio Analyzer performs several measurements and contains various features specifically designed for receiver testing.   The most common audio measurements are SINAD for FM receivers and signal-to-noise for AM receivers.   In the 8903A， these measurements are optimized for measuring the noisy signals encountered in the receiver testing. Measurements of SINAD are indicated both by the analog meter and the digital display. The specifically marked meter for EIA and CEPT sensitivity and selectivity results in fast， accurate， repeatable measurements.   Also， a psophometric filter allows testing to CEPT standards.


By combining the 8903A with the 8901A Modulation Analyzer， you can make all common transmitter tests.   The 8903A provides the tone for microphone inputs， measures transmitter audio distortion， and counts squelch tones.   Distortion measurements can be made using the 400 Hz high pass filter to reject squelch tones.   In rapid frequency count mode， counter measurements can be made at a rate of 8 ms/reading， allowing burst counting of squelch tone frequencies. In rapid source mode， the