Agilent Technologies E4448A Manual

Chapter 1 33
Introduction
Installing Optional Measurement Personalities
Introduction
How to Predict Your Memory Requirements
If you plan to install many optional personalities, you should review your memory
requirements, so you can determine whether you have enough memory (unless you
have a PSA Series with Option 115). There is an Agilent “Memory Calculator”
available online that can help you do this, or you can make a calculated
approximation using the information that follows. You will need to know your
instrument’s installed memory size as determined in the previous section and then
select your desired applications.
NOTE If you have a PSA Series analyzer with Option 115, there is adequate memory to
install all of the available optional personalities in your instrument.
To calculate the available memory on your PSA, see:
http://sa.tm.agilent.com/PSA/memory/
Follow the steps on the web page to see if your desired configuration is compatible
with your installed memory.
NOTE After loading all your optional measurement personalities, you should have a
reserve of ~2 MBytes of memory to facilitate mode switching. Less available
memory will increase mode switching time. For example, if you use excessive free
memory by saving files of states and/or data, your mode switching time can
increase to more than a minute.
You can manually estimate your total memory requirements by adding up the
memory allocations described in the following steps. Compare the desired total
with the available memory that you identified in the previous section.
1. Program memory - Select option requirements from the table “Measurement
Personality Options and Memory Required” on page 34.
2. Shared libraries require 7.72 MBytes.
3. The recommended mode swap space is 2 MBytes.
4. Screens - .gif files need 20-25 kBytes each.
5. State memory - State file sizes range from 21 kB for SA mode to 40 kB for
W-CDMA. The state of every mode accessed since power-on will be saved in
the state file. File sizes can exceed 150 kB each when several modes are
accessed, for each state file saved.
TIP State memory retains settings for all states accessed before the Save State
command. To reduce this usage to a minimum, reduce the modes accessed before
the
Save State is executed. You can set the PSA to boot into a selected mode by
accessing the desired mode, then pressing the
System, Power On/Preset, Power On
keys and toggle the setting to Last.

Agilent Technologies E4448A Specifications

General

Brand	Agilent Technologies
Model	E4448A
Category	Measuring Instruments
Language	English