Operating Guidelines; Warm-Up And Environmental Considerations; Summary Of Operating Procedures; Measuring Higher Power - ILX Lightwave FPM-8200 User Manual

Operating Guidelines

The discussion below presents guidelines for operation, as well as some common
operating procedures. Remote operations are discussed in the next chapter.

Warm-up and Environmental Considerations

To achieve rated accuracy, let the FPM-8200 warm up for at least 1 hour before
use. Operate the meter within the environmental limits specified in Chapter 1. Best
accuracy will be available for operation near the calibration temperatures.

Summary of Operating Procedures

The following list is a summary of procedures discussed in more depth earlier in
this chapter.
1
2
3
4
5

Measuring Higher Power

The FPM-8200 will not be damaged by input power up to 10 dBm. However,
linearity generally moves outside specification limits above the upper specified
input power limit (see Table 1.1 on page 4).
01_10
Cover the input connector with the supplied cap and press ZERO.
Install the appropriate fiber adaptor on the front panel INPUT connector. Connect your
input fiber patchcord.
Recall your setup parameters by pressing RECALL, or by setting the parameters
individually as described in the following steps.
To set measurement parameters:
Press  and adjust the wavelength by pressing UP or DOWN.
4a
4b Press AUTO/MAN to select either auto-ranging or manual gain range. In manual gain
mode, pressing UP or DOWN steps the gain by a factor of 10. To set a particular gain
range, see Gain Ranges on page 7.
In Manual Range mode, display "- OL -" indicates the input power is greater than 99.1% of
range. In Auto Range mode, this indicates input power is greater than
1.59 dBm.
In Manual Range mode, display "- LO -" indicates the input power is less than 5% of
range. In Auto Range mode, this indicates input power is less than -76 dBm.
4c Press dB and LOCAL/ADR together to check the USER CAL gain factor. Normally
this factor should be 1.000. You can change the gain factor while it is displayed by
pressing UP or DOWN.
To save a new setup, press SAVE followed by UP or DOWN for a memory number (1
through 10), then press SAVE again. Whether or not you save the setup, at next power-up
the FPM-8200 will return to the same setup as you left it.
FR O N T PA N E L O P E R A T I O N
Operating Guidelines
2
C H A P T E R
17
FPM-8200
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