EXFO IQS-1700, User Manual, Page: 48 / 204

Preparing Your High Performance Power Meter for a Test
40
IQS-1700
Nulling Offsets
To perform an offset nulling on one channel:
1.
Install the protective cap over the detector port.
2. If necessary, select the desired channel (on a multichannel high-speed
power meter).
To set the channel, see
Selecting a Channel (Multi-Channel Models)
on
page 23.
Offset nulling values are applied to the channel until a new nulling is
performed.
3. Under
Channel
, click the
Nulling
button. A message prompts you to
ensure that the detector cap is properly installed.
4. Select OK to perform the offset nulling, or Cancel to exit.
A red message appears beneath the power value of the channel for
which you are performing a nulling.
If you are using a multichannel power meter, you will notice that the
other channels will stop reading power while nulling is in progress.