Viavi 8800SX Bedienungsanleitung

Basic Transceiver

tests with the

8800SX

Basic Interconnects

Interconnect 1 – Basic Transmitter/Receiver tests

For basic Transmitter and Receiver

tests, connect the 8800SX TR port

to the Radio ANT port.

RF Test cable

The TR port on the 8800SX is a bi-directional RF port that can generate a signal

to test a receiver as well as measure transmitter characteristics like Power,

Frequency and Modulation. This port is rated at 50 Watts input. Measurements

to 125 Watts are possible observing duty cycle to prevent overheating.

Access to built-in presets

•The small tab at the top center of the

display allows access to the launch bar.

•Simply touch the tab and the launch bar

will expand.

•Press the Utilities tab

and then the Presets

menu to rapidly

configure the 8800SX

for either Analog or

Digital testing.

Presets quickly configure

standard tile selections and

locations.

Access to built-in setup files

•Setup files store complete instrument

configurations that include all settings.

•To open the menu, simply touch the tab

and the menu will expand.

•Press the Utilities tab

and then the

Store/Recall item to gain

access to the pre-

configured test setups

that are within every

instrument.

Every 8800SX is pre-configured

with a large group of sample

setups to configure the instrument

for a variety of basic tests.

Store/Recall Navigation

•When first entering the

Store/Recall menu, a folder named

“Sample Setups” will be visible.

•To enter the folder, touch or

highlight the Sample Setups item

on the list then press the icon to

enter the folder.

The Sample Setups

•After entering the Sample Setups

folder, there are a variety of basic test

folders available.

•This presentation will show some of

the ones available for FM and AM

transceiver testing.

•Highlight the Analog FM folder and

press the icon to enter the folder.

Configure the 8800SX for FM Transmitter test

•Highlight the TX_Test_FM setup

file and press the Recall button.

•This will configure the 8800SX to

perform basic FM transmitter tests.

Measure TX Frequency and Power

1. Zero the Power Meter.

2. Connect the transmitter as illustrated

on slide 1.

3. Enter the transmitter frequency on the

Receiver Tile.

4. Key the transmitter.

5. Measure and record the RF Error. This

is the transmitter frequency error.

6. Measure and record the RF Power Avg

reading. This is the Transmit Power

level.

Always Zero the Power Meter

before taking power

measurements.

Improving the power measurement

•If the loss of the test cable is known, the

Power Meter can be compensated by that

amount by entering the cable offset value as

a negative number on the Expanded

Receiver tile.

•After entering this offset, the transmitter

output now reads 3.26 watts. This radio had

been configured to transmit at 3.2 Watts in

this frequency band.

Measure Modulation (Basic Check)

A basic transmitter modulation check can be

done after making the following changes to

the current setup.

1. Press the Home button on the 8800SX

front panel.

2. Press the Speaker control to enable the

speaker.

3. Press the Home button again to minimize

the menu.

4. Note that Audio Volume and Squelch

controls are also available on this menu.

These may need to be adjusted later as

necessary.

Home Button

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