Setting Measurement Limits; Setting Channel Limits - Agilent Technologies E4418B User Manual

2 Power Meter Operation

Setting Measurement Limits

You can configure the power meter to detect when a measurement is
outwith a predefined upper and/or lower limit value.
There are two types of measurement limits you can set:
• Channel Limits - are applied to the input channel and are for power
• Window Limits - are windows based (upper and lower) and can be
Only one set of limits can be on at a time, that is, Channel, OR Window.
N O T E

Setting Channel Limits

The power meter can be configured to verify the power being measured
against an upper and/or lower limit value. The range of values that can be
set for upper and lower limits is –150 dBm to 230 dBm. The default
upper limit is 90.00 dBm and the default lower limit is –90.00 dBm.
To set the limits:
1 Press
2 To change either of these settings, press the appropriate softkey. The
3 To confirm your choice, press the appropriate measurement units.
Limits can be disabled and re- enabled simply by pressing
70
measurements only.
applied to power, ratio, or difference measurements. In addition, the
window based limits can be set to output a TTL logic level at the rear
panel Rmt I/O port when the predefined limits are exceeded.
,
Input Settings Limits
maximum and minimum limits are displayed under the
softkeys respectively.
power meter displays the current value in a pop- up window. Modify
this value (see below) until the desired value is displayed.
• Use or
currently positioned.
• Use or
, . The current setting of the
to modify the digit on which the cursor is
to move to other digits.
and
Max
Limits Off On
E4418B Power Meter User's Guide
Min
.