Agilent Technologies 85032B/E 50 Spécifications télécharger pdf (Page 18)

NFS

The analyzer’s built-in NFS (network file system)

client provides access to remote files and directo-

ries using the LAN. With NFS, remote files and

directories (stored remotely on a computer) behave

like local files and directories (stored locally within

the analyzer). Test data taken by the network ana-

lyzer can be saved directly to a remote PC or

UNIX® directory, eliminating the need for a

remotely initiated ftp session. For Windows-based

applications, third-party NFS-server software must

be installed on the PC. NFS is fully supported in

most versions of UNIX.

Bootp

Bootstrap protocol (bootp) allows a network ana-

lyzer to automatically configure itself at power-on

with the necessary information to operate on the

network. After a bootp request is sent by the ana-

lyzer, the host server downloads an IP and gateway

address, and a subnet mask. In addition, the ana-

lyzer can request an IBASIC file, which automati-

cally executes after the transfer is complete. For

Windows-based applications, third-party bootp-

server software must be installed on the PC.

Bootp is fully supported in most versions of UNIX.

Programming with IBASIC

As a standard feature, all Agilent 8712ET/ES and

8714ET/ES network analyzers come with the

Instrument BASIC programming language

(IBASIC). IBASIC facilitates automated measure-

ments and control of other test equipment, improv-

ing productivity. For simpler applications, you can

use IBASIC as a keystroke recorder to easily auto-

mate manual measurements. Or, you can use an

optional, standard PC keyboard to write custom

test applications that include:

• Special softkey labels

• Tailored user prompts

• Graphical setup diagrams

• Barcode-reading capability

• Control of other test instruments via the GPIB,

serial, or parallel interfaces

Measurement calibration

Measurement calibration is a process that

improves measurement accuracy by using error-

correction arrays to remove systematic measure-

ment errors.

The Test Set Cal and SelfCal features on your mul-

tiport test system increase the accuracy of your

measurements and significantly increase the test

efficiency of your work stations by eliminating fre-

quent and lengthy calibration procedures.

Test Set Cal

A Test Set Cal is a calibration that should be per-

formed on a regular, but relatively infrequent basis

(at least once a month is recommended). A Test

Set Cal requires connection of mechanical calibra-

tion standards to all of the ports you will be using

for your measurements.

Test Set Cal for the Agilent 8712ET and Agilent 8714ET

analyzers

The data collected by the analyzer during a Test

Set Cal always includes both transmission

(enhanced response) calibration data and reflec-

tion (one-port) calibration data. When making

measurements after calibration, the analyzer auto-

matically recalls and uses the correct set of cali-

bration data for the type of measurement chosen.

Test Set Cal for the Agilent 8712ES and 8714ES analyzers

The S-parameter network analyzers perform either

two-port calibration or enhanced response/one-

port calibration. Choosing a two-port calibration

for the Test Set Cal removes the most systematic

errors, giving you the greatest measurement accu-

racy. Choosing the enhanced response/one-port

calibration allows faster measurement speeds, but

is not as accurate as full two-port calibration.

SelfCal

A SelfCal is an internal system calibration that

automatically executes in just a few seconds on a

regular, frequent basis (once per hour is recom-

mended). A SelfCal does not require that you

remove your DUT or that you make any connec-

tions of external calibration standards. The SelfCal

uses the results of the most recent Test Set Cal,

along with current measurements of internal, elec-

tronically switched, open, short, load and through

standards. SelfCal removes the drift of the network

analyzer and multiport test set due to environmen-

tal variations.

System features (continued)

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