8163A/B, 8164A/B, 8166A/B User’s Guide 109
Power Measurement 3
Figure 61 Zeroing Fails, if the Power Meter Receives Input Light.
How to Choose the Range Mode
You can choose either of two ranging modes from the Range mode menu:
•<Auto>, the auto-ranging mode, ensures that the result has a displayed
value between 9% and 100% of full scale. The default state is for
automatic ranging to be enabled.
•<Manual>, which allows you to set a user-defined range.
For a Dual Power Sensor, you cannot set the range mode of the slave
channel, channel 2, directly. By default, the range mode of the slave
channel, channel 2, is the same as that for the master channel,
channel 1. See
Table 12 on page -122 for more details.