Checking The Stability - Agilent Technologies HP E5574A User Manual

All of the OLA
applications for loss
measurements provide the
D –>R softkey.
ISP EF
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Introducing the HP E5574A Optical Loss Analyzer
Getting Started
3 Press A and activate "Powermeter".
PPL
4 Check the "Head" parameter on the display.
5 Press H A or H
EAD EAD
which you have connected the optical output.
6 Check the power output value on the display. For the internal
source it should be around –7.5 dBm.
7 Press D –>R .
ISP EF
8 Press A to terminate the "Powermeter" application.
PPL
After storing the reference power, the instrument is ready to
measure power loss.
ATTEN TI O N If you change the interface adaptors or the source,
you must measure and store the reference power anew.

Checking the Stability

Mechanical and electrical stability are vital issues in the
measurement of optical characteristics.
After warm-up, the electrical stability of the OLA reaches or
surpasses the values stated in its Technical Data sheet.
The mechanical stability depends on your setup.
After the first setup and after any change it is advisable to check the
stability. Most of the OLA applications offer the
How to Check the Stability
1 Press S to measure the variation of the optical power
TABILITY
received by the head(s).
The instrument uses a sliding time window of 5 s and displays
the difference between the highest and lowest power value
36
B, respectively, to activate the head to
S
TABILITY
softkey.