Keysight (Agilent) N4391A REPAIR and Keysight (Agilent) N4391A CALIBRATION

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Custom-Cal has a high success rate in the repair of the Keysight (Agilent) N4391A. A calibration by Custom-Cal is performed by engineers with extensive OEM experience. We have the expertise and the necessary standards to perform the Keysight (Agilent) N4391A Calibration, onsite calibration may be available. We specialize in quick turnaround times and we can handle expedited deliveries upon request.

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   Keysight (Agilent) N4391A   Description / Specification:    
Keysight (Agilent) N4391A Optical Modulation Analyzer

The Keysight N4391A Optical Modulation Analyzer offers most sophisticated signal processing algorithms with highest flexibility. The analysis software is based on the industry standard Keysight Vector Signal Analysis (VSA) software with extensions for the optical requirements like dual polarization data processing. This analysis software is the work horse in RF and mobile engineering labs and offers all tools needed to analyze complex modulated (or vector modulated) optical signals. It provides a number of parameters that qualifies the signal integrity of your measured signal. The most common one is the normalized geometric error of the Error Vector Magnitude (EVM) of up to 4096 symbols.
Specifications.

Optical modulation analyzer.
Maximum detectable baud rate: Up to 62 Gbaud.
Sample rate: 4 x 80 Gs/s.
Number of polarization alignment algorithms: 6.

Digital demodulation uncertainty.
Error vector magnitude noise floor: 1.8 %rms.
Amplitude error: 1.1 %rms.
Phase error: 0.9°.
Quadrature error: 0.05°.
Gain imbalance between I and Q: < 0.007 dB.
Image suppression: > 35 dB.
S/N: > 60 dB.
Sensitivity: -20 dBm.

Optical DUT input.
Optical input wavelength range: 1528 nm to 1630 nm.
Maximum input power: +14 dBm.
Maximum input power, damage level: +20 dBm.
Receiver polarization extinction ratio: > 40 dB.
Average input power monitor accuracy: ± 0.5 dB.

Optical local oscillator output.
Optical CW output power: > +14 dBm.
Wavelength range: 1528 nm to 1630 nm.

External local oscillator input.
Optical input wavelength range: 1528 nm to 1630 nm.
External local oscillator input power range: 0 dBm to +14 dBm.
Maximum input peak power (damage level): +20 dBm.
Small signal gain, external laser input to local oscillator output (-20 dBm LO input power): 28 dB @ 1550 nm.
Saturation output power @ -3 dB compression: 15 dBm.

Data acquisition.
Sample rate: Up to 80 GSa/s on each channel.
Data acquisition bandwidth: 20/25/33 GHz upgradable.
Jitter between channels: typ 700 fs.
Noise: 0.6 mV rms @ 10 mV range, 32 GHz bw.
ADC resolution: 8 bit/16 bit (interpolated).
Sample memory per channel: Up to 2 Gs/channel.

Options.
-110, Optical modulation analyzer with 4 channel receiver and analysis software.
-210, Internal local oscillator.
-220, Internal local oscillator and external local oscillator input and local oscillator output.
-500, C band iTLA internal local oscillator.
-501, L band iTLA internal local oscillator.
-510, Fast tunable C & L band local oscillator.



 



Related Optical Terms and Definitions. For a complete list go to our  Terms and Definitions Page.

Amplified Spontaneous Emission Source (ASE)
ASE, a process where spontaneously emitted radiation (luminescence) is amplified. In lasers and particularly in high-gain erbium-doped amplifiers, amplified spontaneous emission is usually an unwanted effect. It tends to limit the gain achievable in a single stage of a fiber optic amplifier to the order of 40–50 dB.

Dynamic Range
In a transmission system, the ratio of the overload level to the noise level of the system, usually expressed in dB. Ratio of the highest to lowest detectable signal of a system, expressed in dB.

Optical Power
Optical Power is usually measured in "dBm", or decibels referenced to one miliwatt of power. while loss is a relative reading, optical power is an absolute measurement, referenced to standards. You measure absolute power to test transmitters or receivers and relative power to test loss.

Relative Wavelength Accuracy
When randomly changing the wavelength and measuring the differences between the actual and displayed wavelengths, the relative wavelength accuracy is ± half the span between the maximum and the minimum value of all differences.

Wavelength
Wavelength is a term for the color of light, usually expressed in nanometers (nm) or microns (m). In Fiber Optics the wavelenghts mostly used are in the infrared region where the light is invisible to the human eye.


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