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OA 5000 Series User Manual
1 --- 5
Check the ATTENUATION readout and verify that it is set to 10.00 dB.
Step 12: Press RECALL 2.
Check the ATTENUATION readout and verify that it is set to 21.50 dB.
The SET REF button allows you to set a reference value for the attenuation.
You can then measure attenuation relative to this set value.
Step 13: Press MIN ATT.
This sets the OA 5000 to 0 dB attenuation.
Step 14: Press the SET REF button.
The word SET will appear in the w avelength display. The reference value
can now be adjusted w ith the COARSE and FINE knobs.
Step 15: Adjust the reference value for ---8.00 dB using the COARSE
and FINE knobs.
Step 16: Press the SET REF button to accept the displayed value. The
display will return to normal.
Step 17: Press the MODE button.
Notice that the -- REF indicator is lit, indicating that the attenuation
display is now displaying attenuation relative to a reference value. The
attenuation display shows 8.00 dB and the MIN ATT button is lit.
Step 18: Using the COARSE knob, adjust the attenuation to 10.00 dB.
Step 19: Press the MIN ATT button. Check that the attenuation readout
has changed to 8.00 dB and the MIN ATT button is lit.
The attenuation display reads 8.00 dB, instead of 0.00 dB, because the
display is still in reference mode and the reference value is (---8.00).
Pressing MIN ATT will set the OA 5000 to 0.00 dB only if the display is
not in reference mode or the reference value is 0.00 dB.
Step 20: Recall the first stored setting by pressing RECALL 1.
Remember that you set STORE 1 to 10.00 dB. Note that the attenuation
readout is 18.00 dB. The display shows the value: 10.00 --- (---8.00)=
18.00 dB.
Setting a Reference
Value