Keysight Technologies FieldFox N9927-90002 Manuale utente

Quick Reference Guide

Keysight FieldFox

Microwave Analyzers

Contents

Do You Have Everything?................... 1

The Power Button and LED................ 1

Battery Usage ..................................... 2

Measure Return Loss (CAT) ............... 3

Measure 1-Port Cable Loss (CAT) .... 4

Measure DTF (CAT)............................. 5

Measure S-Parameters (NA).............. 6

Multi-Trace Configurations (NA)........ 8

Calibration (CAT, NA, VVM)................ 9

Spectrum Analyzer Mode (SA).........10

Channel Measurements (SA) ...........11

Record Playback (SA).......................12

Power Meter Mode...........................13

Save and Recall Files........................14

Do you have everything?

FieldFox –To check for installed options, press

System then System Configuration then

Options then Show Options

Phase stable jumper cable or adapters –Used to

connect the FieldFox to devices with various

connector types and gender.

Attenuators –Reduces power and prevents

damage to the FieldFox at the RF IN port.

Cal Kit –OSL Tee or other calibration devices.

SD card or USB flash drive –Save files to these

devices for quick download to a PC.

USB Power Sensor –For making Power Meter

measurements. (Opt 302)

Battery charger or extra battery

The Power Button and LED

To turn power ON, briefly press the power button.

The LED is green. The boot-up takes about 60

seconds.

To switch to Stand by power (low battery drain)

briefly press the power button. The LED is amber and

blinks slowly. To turn power ON, briefly press the

power button. Power and settings are restored

instantly.

To turn Power OFF (very low battery drain) press and

hold the power button until power is shut OFF -

about 4 seconds. The LED is OFF.

Battery Usage

A fully charged battery should last about four hours.

Battery charge status is viewable:

In the upper-right corner of the screen.

On the battery. To view the LCD gauge on the

Inspired Energy battery, open the FieldFox battery

compartment door.

To conserve battery power:

Use Hold mode to trigger a measurement only when

needed. Hold is shown on the display.

Press System then Display then Brightness then

dim the FieldFox display as much as possible.

Briefly press the power button to switch to Stand by

mode when not being used. Press again to restore

power. All current settings are preserved.

The FieldFox will shutdown automatically when battery

power is very low to prevent it from being completely

discharged.

Use ONLY a FieldFox charger to recharge a battery.

The battery can be fully charged while in the FieldFox in

about 4 hours with the FieldFox either ON or OFF.

A fully discharged battery takes about 1.5 hours to

recharge to 80%.

The battery can be fully charged in about 4 hours using

the external battery charger (Opt 872).

Measure Return Loss (CAT Mode)

Return loss can be thought of as the absolute value of

the reflected power as compared to the incident power.

When measuring an OPEN or SHORT, all incident power

is reflected and 0 dB return loss is displayed.

When measuring a LOAD, very little power is reflected

and values of 40 dB to 60 dB are displayed.

1. Connect the Device Under Test (DUT).

2. Select Preset then Preset Returns the FieldFox to

known settings.

3. Select Mode then CAT (Cable and Antenna Test)

4. Then Return Loss (Default measurement).

5. Press Freq/Dist and enter Start and Stop frequency

values of the measurement.

6. Press Meas Setup 4then Settings to make

appropriate settings before calibrating.

7. Disconnect the DUT and press Cal 5then follow the

calibration prompts.

8. Reconnect the DUT (cable to be tested).

Optional

Add Markers –All Modes except VVM and Power

Meter

Add Limits –All Modes except VVM and Power Meter

Save Settings and Data –All Modes

Measure 1-Port Cable Loss (CAT Mode)

Required Equipment:

LOAD with correct connector type and gender to

terminate the end of the DUT.

Optional phase stable jumper cable or adapter to

connect the beginning of the DUT to the FieldFox.

1. Press Preset then Preset

2. Then More then Cable Loss (1-Port)

3. Connect the DUT.

4. Press Freq/Dist and enter Start and Stop

frequency values of the measurement.

5. Press Sweep 3then Min Swp Time Increase the

sweep time until a stable trace is visible on the

screen.

6. Press Cal 5then follow the calibration prompts.

7. Connect the DUT (cable to be tested) to the FieldFox

and connect a LOAD at the end of the DUT.

Depending on the DUT, the following three steps may

improve the amount of ripple visible on the screen.

8. Press Trace 6 then Math and Memory, then

Data->Mem.

9. Remove the LOAD and leave the end of the DUT

open.

10.Press Data Math then Data –Mem. Use Averaging

for high-loss measurements. Press BW 2then

Averaging

11.Read Avg Cable Loss on the FieldFox screen.

Measure Distance to Fault

Required Equipment:

LOAD with correct connector type and gender to

terminate the end of the DUT.

Known length and cable type or Cable Loss

(dB/Meter) and velocity factor of the DUT.

Optional phase stable jumper cable or adapter to

connect the beginning of the DUT to the FieldFox.

1. Connect any necessary jumper cable or adapter to the

FieldFox RF OUT port.

2. Press Preset then Preset

3. Then Mode then CAT

4. Then Distance to Fault

5. Press Freq/Dist then Stop Distance and enter the

length of the DUT.

6. If a diplexer or other filter is in the measurement path,

press Meas Setup then select Frequency Mode

[Bandpass]. Then press Freq/Dist and manually

type the Min Start and Max Stop frequencies.

7. Press Cal 5and follow the Cal prompts.

8. Disconnect any components or antenna that should

NOT be measured and connect a LOAD at the end of

the DUT.

9. Press Meas Setup 4then DTF Cable

Specifications.

10.Either press Recall Coax Cable or enter the

Velocity Factor and Cable Loss of the DUT.

11.Connect the start end of the DUT to the FieldFox. The

DTF measurement is displayed.

Measure S-Parameters (NA Mode)

S-parameter syntax is described by the following:

S (out | in)

out = FieldFox receiver port

in = FieldFox source port

1. Press Preset then Preset

2. Press Measure 1then choose from the following:

S11 1-port reflection measurement.

S21 2-port transmission measurement.

S12 Reverse 2-port transmission measurement.

Requires Opt 122.

S22 Reverse 1-port reflection measurement.

Requires Opt 122.

OR Press Trace 6then Num of Traces then select a

Multi-trace configuration. Learn more on page 8.

3. Press Freq/Dist then either Start and Stop or

Center and Span to enter a frequency range for the

measurement.

4. Press BW 2then IFBW to select the IF Bandwidth

for the measurement. Narrower bandwidths require

more time to sweep.

5. Press Sweep 3then Resolution to select the

number of data points for the measurement. More

data points requires more time to sweep.

6. Press Cal 5to calibrate the measurement. See page

6 to learn more.

Continued on following page…

Measure S-Parameters (NA Mode)

continued

The following NA Mode settings can be made before or

after calibrating without affecting measurement

accuracy.

Press Scale/Amptd to change scale.

Autoscale Adjusts the Y-axis to comfortably fit

the Min and Max amplitude of the active trace.

Autoscale All Autoscales all of the traces on

the screen. Useful for multi-trace configurations.

Scale Manually enter a scale per division to view

specific areas of the trace.

Ref Level Manually set the value of the

reference line.

Ref Position Manually set the position of the

reference line. Values must be between 0 (TOP

line) and 10 (BOTTOM line)

Press Measure 1then Format to change the

format for the measurement.

Press BW 2then Averaqe then enter a value for

the number of trace sweeps to average.

Press Marker then enter a value to move the marker

to the X-axis position of interest.

Press Limit 8then Edit or Recall Limits to test

measurement results against limit lines.

Multi-Trace Configurations (NA Mode)

You can display multiple traces on the FieldFox screen.

The above image shows a 3-trace configuration. Tr1 is

the ACTIVE trace as indicated by the highlighted Tr1

annotation in the upper left corner.

The Frequency Range, IF BW, Resolution, Averaging, and

Output power is common to all traces. All trace settings,

such as format, markers, and limit lines, are applied to

the ACTIVE trace in the same manner as when a single

trace is present.

To select a multi-trace configuration:

Press Trace 6 then Num Traces

Then choose a multi-trace configuration.

To activate a trace in order to change a setting:

Use the ▲|▼ arrows to scroll through the traces -

Press Trace 6 then select Trace 1, Trace 2,

Trace 3, or Trace 4, Only traces that are shown can

be activated.

By default with Multi-trace configurations, Markers that

are applied to one trace are applied to ALL traces.

Calibration

Calibration is performed in CAT, NA, and VVM Modes.

A calibration is performed automatically when the

FieldFox is powered ON and when Preset. This Preset Cal

(also known as CalReady) sets the reference plane at the

RF OUT connector.

For highest accuracy, perform a QuickCal or O,S,L when

any of the following occur:

The temperature changes significantly.

The Frequency Range, Resolution, Min Swp Time, or

Power Level is changed.

When using a phase stable jumper cable or adapter

to connect the DUT to the FieldFox. These should be

high-quality components.

Press Cal 5then follow the prompts.

During a QuickCal, press Skip Load when NOT using a

jumper cable or adapter.

Cal ON is shown on the screen when a Preset Cal is

correcting the measurement.

Cal ON Q is shown on the screen when a QuickCal is

correcting the measurement.

CAL ON U is shown on the screen when an O,S,L Cal is

correcting the measurement.

When a calibration is being interpolated, an asterisk is

added to the screen annotation as follows: Cal ON*

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