85092C Просмотр технического описания (PDF) - HP => Agilent Technologies

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85092C

4.5 GHz Single-Mode Lightwave Component Analyzer for CATV and Radio over Fiber

HP => Agilent Technologies 

State-of-the-art remote control

Testing the frequency response of electro-optical compo-

nents under a wide range of parameters, which is often

necessary in qualification cycles, is very time consuming.

To support the user in minimizing the effort for perform-

ing this huge number of tests, all functions of the LCA can

be controlled remotely via LAN over the state-of-the-art

Microsoft .NET or COM interface. This interface is identical

for all LCA of the N437xB/C series.

Based on programming examples for VBA with Excel, Agi-

lent VEE and C++, it is very easy for every user to build ap-

plications for their requirements.

These examples cover applications like integration of com-

plete LCA measurement sequences.

Integrated optical power meter

In applications where optical power dependence character-

ization is needed, the average power meter can be used to

set the exact average output power of the LCA transmitter

by connecting the LCA optical transmitter output, optionally

through an optical attenuator, to the LCA optical receiver in-

put. By adjusting the transmitter output power in the LCA

user interface or the optical attenuation, the desired trans-

mitter optical power can be set.

In cases where an unexpectedly low responsivity is mea-

sured from the device under test, it is very helpful to get a

fast indication of the CW optical power that is launched into

the LCA receiver. The cause might be a bad connection or a

bent fiber in the setup. For this reason too, a measurement

of the average optical power at the LCA receiver is very help-

ful for fast debugging of the test setup.

Selectable output power of the transmitter

Most PIN diodes and receiver optical subassemblies need to

be characterized at various average optical power levels. In

this case it is necessary to set the average input power of

the device under test to the desired value. The variable aver-

age optical output power of the LCA transmitter offers this

feature. Together with an external optical attenuator, this

range can be extended to all desired optical power levels.

Group delay and length measurements

In some applications it is necessary to determine the elec-

trical or optical length of a device. With the internal length

calibration of the electro-optical paths with reference to the

electrical and optical inputs or outputs, it is possible to de-

termine the length of the device under test

External optical source input

For applications where test of opto-electric devices need to

be done at a specific optical wavelength, the N4374B-050

offers an external optical input to the internal modulator

where an external tunable laser can be applied. As modula-

tors are polarization sensitive devices, this input is a PMF

input to a PMF optical switch to maintain the polarization

at the internal modulator.

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