Agilent Technologies 8922S Bedienungsanleitung PDF herunterladen (Seite 3)

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Switch on one of Agilent Technologies’ GSM test

sets and you’ll find your mobile finds service

immediately. Now make a call and you’re up and

running; ready to perform all the key transmitter

and receiver measurements. Built-in to every test

set you’ll find . . .

Transmitter tester

Transmitter measurements such

as power versus time, modulation

phase and frequency error, and

burst timing are made using a

fast DSP analyzer. There’s also

an accurate peak power meter

to perform the GSM average Tx

power measurement, taking sam-

ples only during the active part of

the burst.

Receiver tester

Receiver testing is done using an

accurate 0.3 GMSK source. The

wide dynamic range allows for

low-level sensitivity measurements

and high power tests to check for

receiver saturation. Mobile receiver

sensitivity is measured by making

bit-error-rate measurements on

Class Ia, Ib and II bits in either

raw or residual form.

Spectrum analyzer

The optional spectrum analyzer

completes the array of GSM meas-

urements which can be made. It

provides high dynamic range pulse

on/off ratio measurements and

output RF spectrum tests. The

spectrum analyzer also makes an

excellent diagnostic tool for tracing

signals and finding problems.

Toolkit

The full-featured tool-kit includes

a power meter, CW RF synthesiz-

er, audio synthesizer, frequency

vounter, DVM, audio analyzer,

oscilloscope and DSP Analyzer.

These tools can be configured

to measure just about any signal

a GSM phone can produce,

whether on a call or in test-mode.

Base station emulator

The GSM base station emulator

creates a test network to which the

mobile can camp and make calls.

The emulator is capable of causing

a ‘simple camp’ so that receiver

and transmitter functions can be

verified separately. A speech coder

is present to allow functional voice

testing. A variety of basic call pro-

cessing features test the mobile as

if it were in a real network. These

features include hopped traffic

channels, call origination and

termination (both mobile and base

station), hand-overs, channel

assignments, Tx power control

commands and a choice of control

channel configurations.

Automatic software

The optional automatic test soft-

ware is easy to use, fast and

simple to configure. With the

flexibility to allow test sequences

to be created and saved in min-

utes, automatic test software

personalizes the test set for each

part of the incoming inspection

or repair process.

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