Keysight Technologies FieldFox User manual

Contents

Do you have everything? ..................... 1

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

Connector Care……………………………….2

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

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

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

Measure Distance to Fault (CAT) ........ 5

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

Multi-Trace Configurations (NA Mode)8

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

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

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

Record Playback (Opt 236) ............... 12

RTSA Mode (Opt 350)………………..13

Power Meter Mode ............................ 15

Save and Recall Files......................... 16

Quick Reference Guide

Keysight FieldFox

Microwave Analyzers

Do you have everything?

FieldFox –To check for installed options, press

System then System Configuration then Options

then Show Options

Cal Kit – OSL Tee or other calibration devices.

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 Standby power (low battery drain)

briefly press the power button. A 10 second

counter is displayed that allows you to choose

Standby / Shutdown / Restart or to let the

countdown counter expire after 10 seconds then

perform the action. The LED is green 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

the Shutdown softkey (For details, refer to previous

Standby bullet). The LED is OFF, or solid amber, if

AC power is connected.

Connector Care

To maintain optimum performance in your FieldFox:

https://literature.cdn.keysight.com/litweb/pdf/08510-

90360.pdf.

Battery Usage

A fully charged battery should last about four hours.

Battery charge status is viewable:

-In the upper-right corner of the screen.

To conserve battery power:

-Use Hold (Run/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.

-Press the power button and press the Standby

softkey 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)

Starting with A.11.25 firmware, for the B

models, the FieldFox output power defaults to -15 dBm.

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 greater than 40 dB are displayed.

1. Connect the Device Under Test (DUT).

2. Select Preset then Preset (Factory) Returns the

FieldFox to known settings.

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

4. Then Measure 1 then Return Loss

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).

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. Select Mode then CAT (Cable and Antenna Test)

3. Then Measure 1

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

5. Connect the DUT.

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

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

and connect a LOAD at the end of the DUT.

8. Press Trace 6then 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 (CAT Mode)

Starting with A.11.25 firmware, for the B

models, the FieldFox output power defaults to -15 dBm.

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 (Factory)

3. Then Mode then CAT

4. Then Measure 1 then Distance to Fault (dB)

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 4 then select Freq Mode then

Bandpass. Then press Freq/Dist and manually type

the Min Start Freq and Max Stop Freq frequencies.

7. Press Cal 5and see the FieldFox User’s Guide.

8. Press Meas Setup 4then DTF Cable Specifications.

9. Either press Edit/Save/Recall Cables or enter the

Velocity Factor and Cable Loss manually--using

Cable Corr [Manual]--of the DUT.

10.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 then Mode then NA then choose from the

following:

-S11 1-port reflection measurement.

-S21 2-port transmission measurement.

-S12 Reverse 2-port transmission measurement.

Requires the full 2-port S-parameter option.

-S22 Reverse 1-port reflection measurement.

Requires the full 2-port S-parameter option.

OR Press Trace 6 then 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 Freq Span to enter a frequency range for the

measurement.

4. Press Cal 5 to calibrate the measurement. See page 9

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 Measure 1then Format to change the

format for the measurement.

-Press BW 2then Averagethen 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 8 then Edit Limits 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 6then Num of Traces

-Then choose a multi-trace configuration.

Calibration (CAT, NA, VVM)

Starting with A.11.25 firmware, for the B

models, the FieldFox output power defaults to

-15 dBm.

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

A calibration is performed automatically when the

FieldFox is powered ON, CalReady sets the reference

plane at the test port connectors.

Press Cal 5then see the FieldFox User’s Guide.

Cal Rdy is shown on the screen when a CalReady is

correcting the measurement.

CAL ON U is shown on the screen when a User 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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