Agilent Technologies 83482A, User Manual, Page: 33 / 88

2-17
Channel Setup Menu
External scale....
Units
The Units function lets you select the unit of measure appended to the chan-
nel scale, offset, trigger level, and vertical measurement values. For the optical
channel these units are Volts or Watts. For the electrical channel the units are
Volts, Amperes, Watts, or unknown. Use Volt for voltage probes, Ampere for
current probes, Watt for optical-to-electrical (O/E) converters, and unknown
when there is no unit of measure or when the unit of measure is not one of the
available choices.
Key Path
Channel, External scale
....
, Units
Ext gain and Ext offset
When you select Ampere, Watt, or unknown on an electrical channel or Volt on
an optical channel, two additional functions become available: External Gain
and External Offset. These two additional functions allow you to compensate
for the actual characteristics of the probe rather than its ideal characteristics.
For example, you might have an amplified lightwave converter with ideal char-
acteristics of 300 V/W with 0 V offset. But, its actual characteristics are 324 V/
W with 1 mV of output offset. Therefore, set the External Gain to 324 V/W and
the External Offset to 1 mV.
Key Path
Channel, External scale
....
, Units Volt Ext gain
or
Ext Offset
Channel , External scale
....
, Units Watt Ext gain
or
Ext Offset
Channel
,
External scale
....
, Units Unknown Ext gain
or
Ext Offset