User`s guide
Table Of Contents
- Legal Information
- Equipment Operation
- General Safety Considerations
- Regulatory Information
- List of Related Publications
- Agilent TechnologiesE4418B Options
- About this Guide
- Getting Started
- Power Meter Operation
- Introduction
- Battery Operation (Option 001)
- Zeroing and Calibrating the Power Meter
- Making Measurements with the AgilentE-Series Power Sensors
- Making Measurements with the Agilent8480 Series Power Sensors
- Making Measurements using Sensor Calibration Tables
- Making Measurements using Frequency Dependent Offset Tables
- Setting the Units of Measurement
- Selecting Units of Measurement from the Softkeys
- Making Relative Measurements
- Setting the Resolution
- Setting Offsets
- Setting Averaging
- Measuring Pulsed Signals
- Setting Measurement Limits
- Selecting a Digital or Analog Display
- Setting the Range
- Configuring the Remote Interface
- Recorder Output
- Saving and Recalling Power Meter Configurations
- How Measurements are Calculated
- Presetting the Power Meter
- Self Test
- Operator Maintenance
- Contacting Agilent Technologies
- Menu Reference
- Error Messages
- Specifications
Power Meter Operation
Setting Measurement Limits
Agilent E4418B User’s Guide 2-43
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 measurements only.
• Window Limits - are windows based (upper and lower) and can be
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.
Note Only one set of limits can be on at a time, that is, Channel OR
Window.
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 , , . The current setting
of the maximum and minimum limits are displayed under the
and softkeys respectively.
2. To change either of these settings press the appropriate softkey.
The power meter displays the current value in a pop up window.
Modify this value (see below) until the desired value is displayed.
■ Use or to modify the digit on which the cursor is
currently positioned.
■ Use or to move to other digits.
3. To confirm your choice press the appropriate measurement units.
Limits can be disabled and re-enabled simply by pressing
.
A typical application for this feature is shown in Figure 2-11.
System
Inputs
Input Settings Limits
Max Min
Limits Off On
HP4402.book Page 43 Wednesday, November 29, 2000 4:46 PM