PN 10795T 32
9. Attenuation Factors
Note: You must enter an attenuation factor of 1.0 when not using an attenuator.
Note: You must save all settings by pressing and holding the OFF/CANCEL button until the display
blanks. If the H410 is turned off, by using the ON/OFF slide switch, before settings are saved, they will
be lost.
The attenuation factors of optics can be entered into the H410 so the displayed value will automatically
compensate for the amount of attenuation. For example, assume a beam splitter is being used that
transmits 75% and reflects 25% of the beam. If the H410 is set up to measure the reflected beam the
attenuation could be set up as follows:
• An attenuation factor of 1 would display the value of the reflected beam.
• An attenuation factor of 3 would display the value of the transmitted beam.
• An attenuation factor of 4 would display the value of the source.
To enter into the attenuation factor mode:
A. Press the MODE button to start a menu cycle of W, CAL and Attn.
B. Press the ON/SELECT button when the Attn annunciator appears. The current attenuation factor
will be displayed and SET will flash.
C. Press the RANGE (count up) and MODE (count down) buttons to change the attenuation factor to
the desired value. Values of 0.01 to 99.99 may be selected.
D. Press the ON/SELECT button. The attenuation factor is now active and the power meter will
return to the last operational state.
E. Press and hold the OFF/CANCEL until the display blanks to save the setting.
C. Press the ON/SELECT button to turn the H410 back on.
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