Agilent Technologies FieldFox N9912A User manual

Agilent
FieldFox
RF Analyzer
N9912A
User’s Guide
Manufacturing Part Number: N9912–90001
Print Date: April 30, 2012
Supersedes: December 1, 2011
©Agilent Technologies, Inc.

2 N9912A FieldFox User’s Guide
Warranty Statement
The material contained in this document is provided "as is," and is subject to being changed, without
notice, in future editions. Further, to the maximum extent permitted by applicable law, Agilent
disclaims all warranties, either express or implied with regard to this manual and any information
contained herein, including but not limited to the implied warranties of merchantability and fitness for
a particular purpose. Agilent shall not be liable for errors or for incidental or consequential damages in
connection with the furnishing, use, or performance of this document or any information contained
herein. Should Agilent and the user have a separate written agreement with warranty terms covering
the material in this document that conflict with these terms, the warranty terms in the separate
agreement will control.
DFARS/Restricted Rights Notice
If software is for use in the performance of a U.S. Government prime contract or subcontract, Software
is delivered and licensed as “Commercial computer software” as defined in DFAR 252.227–7014 (June
1995), or as a “commercial item” as defined in FAR 2.101(a) or as “Restricted computer software” as
defined in FAR 52.227–19 (June 1987) or any equivalent agency regulation or contract clause. Use,
duplication or disclosure of Software is subject to Agilent Technologies‟ standard commercial license
terms, and non-DOD Departments and Agencies of the U.S. Government will receive no greater than
Restricted Rights as defined in FAR 52.227–19(c)(1–2) (June 1987). U.S. Government users will receive
no greater than Limited Rights as defined in FAR 52.227–14 (June 1987) or DFAR 252.227–7015 (b) (2)
(November 1995), as applicable in any technical data.
Technology Licenses
The hardware and/or software described in this document are furnished under a license and may be
used or copied only in accordance with the terms of such license.
Contacting Agilent
Assistance with test and measurements needs and information on finding a local Agilent office are
available on the Web at: http://www.agilent.com/find/assist
If you do not have access to the Internet, please contact your Agilent field engineer.
In any correspondence or telephone conversation, refer to the Agilent product by its model number
and full serial number. With this information, the Agilent representative can determine whether your
product is still within its warranty period.
Safety and Regulatory Information
The safety and regulatory information pertaining to this product is located on page 154.
Where to Find the Latest Information
Documentation is updated periodically. For the latest information, please visit:
http://www.agilent.com/find/fieldfox
Software Updates
Is your product software up-to-date? Periodically, Agilent releases software updates to fix known
defects and incorporate product enhancements. To search for software updates for your product, go to
the Agilent Technical Support website at: http://www.agilent.com/find/TechSupport or
http://na.tm.agilent.com/fieldfox/.

FieldFox User’s Guide 3
What’s New in A.05.50 Release .................................................... 6
Overview......................................................................................................7
Options and Features....................................................................... 7
Accessories ....................................................................................... 8
About the FieldFox Manuals........................................................... 9
Preparing for Initial Use of Your New FieldFox ...................................10
Check the Shipment....................................................................... 10
Meeting Power Requirements for the AC/DC Adapter ........... 10
Install the Lithium-Ion Battery ..................................................... 11
FieldFox ON/OFF Settings ............................................................ 12
FieldFox High-Temperature Protection ....................................... 12
Avoid Overpowering the FieldFox ................................................ 13
Take the FieldFox Tour .................................................................. 14
Front Panel....................................................................................... 15
Top Panel ......................................................................................... 16
Side Panel........................................................................................ 16
Screen Tour ..................................................................................... 17
How to Enter Numeric Values...................................................... 18
CAT (Cable and Antenna Test) Mode ....................................................19
CAT Mode Settings ........................................................................ 20
Return Loss Measurements ......................................................... 25
1-Port Cable Loss Measurements ............................................... 26
2-Port Insertion Loss Measurements ......................................... 27
DTF (Distance to Fault) Measurements ................................................28
DTF Measurement Settings.......................................................... 29
NA (Network Analyzer) Mode................................................................37
NA Mode Settings.......................................................................... 37
Calibration for CAT, NA, and VVM Modes ............................................50
Verifying Calibration and Jumper Cable Integrity ..................... 55
Calibration Method Summary....................................................... 57

4 N9912A FieldFox User’s Guide
SA (Spectrum Analyzer) Mode...............................................................58
SA Mode Settings .......................................................................... 59
Channel Measurements ................................................................ 85
Interference Analyzer (SA Mode) Option 236 ......................................94
Spectrogram and Waterfall Displays........................................... 94
Record Playback ............................................................................. 98
Power Meter Mode ................................................................................107
Power Meter Settings.................................................................. 108
VVM (Vector Voltmeter) Mode .............................................................113
Overview ........................................................................................ 114
VVM Mode Settings..................................................................... 115
1-Port Cable Trimming Measurements..................................... 118
2-Port Transmission Measurements......................................... 119
Data Analysis Features..........................................................................121
All about Markers......................................................................... 121
All about Limit Lines .................................................................... 130
All about Trace Math................................................................... 132
File Management....................................................................................134
Saving and Recalling Files .......................................................... 134
Printing........................................................................................... 141
System Settings......................................................................................142
Run/Hold ....................................................................................... 142
Preset ............................................................................................. 143
Volume Control ............................................................................. 143
Display Settings............................................................................ 144
Preferences.................................................................................... 146
System Configuration .................................................................. 147
Service Diagnostics...................................................................... 152
Working with the Lithium-Ion Battery ................................................154
Viewing Battery Charge Status.................................................. 154

FieldFox User’s Guide 5
Charging the Battery.................................................................... 156
Reconditioning the Battery......................................................... 157
Battery Care................................................................................... 158
Maximizing Battery Life............................................................... 159
Lithium Ion Battery Disposal...................................................... 159
Hardkey/Softkey Menus .......................................................................160
Safety Considerations ............................................................................170
Certification and Compliance Statements................................ 183
Appendix A: Connector Care Review...................................................185
Appendix B : Specifications/Data Sheet ............................................186
Index.........................................................................................................187

6 N9912A FieldFox User’s Guide
What’s New in A.05.50 Release (Sept. 2011)
For customers upgrading FieldFox firmware, the following is a list of new
features:
NA mode
Unwrapped Phase format ....................................40
10,001 pts from front panel .................................44
Complex Impedance Marker Format................125
Marker Track, Target, and BW Search .............125
SA mode
Custom Radio Standards......................................61
Display Line............................................................81
Audio Beep with Markers.....................................84
GPS saved with Record/Playback session.......148
System
Volume Control ....................................................143
GPS - decimal degrees format............................148
Rev. November 10, 2011
This manual was updated with the following changes:
New units ship with MicroSD card slot. ............16
SA Mode low frequency amplitude accuracy....59
Updated battery reconditioning procedure. ...157

Overview 7
Overview
Options and Features
The FieldFox may be ordered to include the following options and features:
Options and Features
Learn more
Cable and Antenna Test (CAT) Mode
▪ 2 MHz to 4 GHz (Option 104)
▪ 2 MHz to 6 GHz (Option 106)
Measurements:
▪ Distance-to-fault (DTF)
▪ DTF & Return Loss
▪ Return Loss (dB)
▪ VSWR
▪ DTF (VSWR)
▪ Cable Loss (1-Port)
▪ Insertion loss (2-Port) (Option 110)
CAT Mode on page 19
Transmission Measurement (Option 110)
CAT Mode on page 19
NA Mode on page 37
QuickCal (Option 111)
Built-in cal kit. Industry first!
Cal on page 51
Spectrum Analyzer (SA) Mode
General purpose measurements for basic monitoring and
troubleshooting.
▪ 100 kHz to 4 GHz (Option 230)
▪ 100 kHz to 6 GHz (Option 231)
SA Mode on page 58
▪ Preamplifier for Spectrum Analyzer (Option 235)
On page 64
▪ Interference Measurements (Option 236)
On page 94
Power Meter Mode (Option 302)
Use with Agilent External USB Power Sensors
Power Meter Mode on
page 107
Network Analyzer (NA) Mode (Option 303)
▪ 2 MHz to 4 GHz (Option 104)
▪ 2 MHz to 6 GHz (Option 106)
▪ Vector 1-port (Standard)
▪ Scalar 2-port (Option 110)
Measurements:
▪ S11 Reflection (several formats)
▪ S21 Transmission (several formats) (Option 110)
▪ A receiver
▪ R receiver
NA Mode on page 37
Vector Voltmeter (VVM) Mode (Option 308)
Measure electrical length
Measurements:
▪ 1-Port Cable Trimming (Mag and Phase)
VVM Mode on page 113

8 N9912A FieldFox User’s Guide
▪ 2-Port Transmission (Magnitude only)
Designed for Field Environment
▪ Lightweight 6.2 lbs (2.8 kg) including battery
▪ Rugged, weather resistant shell with no fan/vents
▪ Daylight viewable 6.5” (16.5 cm) color LCD
▪ Backlit keys for night use
▪ Integrated kickstand
▪ Configurable hand and shoulder straps
▪ Softcase for carrying all gear
▪ Quick Reference Guide with laminated pages
Slots for removable USB Flash Drive and microSD Card
▪ Expands internal storage
▪ Useful for file transfer
▪ Flash Drive and miniSD Card not included
▪ FieldFox release 4.0 supports microSDHC (high-capacity) Card
Save / Recall on page 136
Battery or AC Power
▪ Rechargeable Li-Ion battery with ~4 hr life
▪ Easily removable battery
▪ AC/DC adapter
▪ External battery charger (N9910X–872)
On page 154.
FieldFox Data Link Software
▪ Easily manage files and compile reports
▪ Reads data from the FieldFox and plots traces
▪ Help file included with the software installation
▪ Download the latest version of the software at
http://www.agilent.com/find/fieldfox
Additional Features
▪ Menus localized to 7 languages
Languages on page 146
Accessories
The following accessories are included with every FieldFox. Spare accessories
can be ordered at any time.
Accessory Part
Number
Description
N9910X–873
AC/DC Adapter
N9910X–870
Lithium-Ion Battery
N9910X–880
Softcase w/ Backpack & Shoulder Strap
N9910X–890
User’s Guide (printed copy)
N9910X–891
Quick Reference Guide (printed copy)
To see a complete list of accessories that are available for the FieldFox, please
visit: http://www.agilent.com/find/fieldfox.

Overview 9
About the FieldFox Manuals
Documentation Map
The following manuals and software are available for the FieldFox. For the very
latest version, please visit our website at: http://www.agilent.com/find/fieldfox.
Check the manual revision on the first page of each manual.
User’s Guide –This manual, included with shipment.
Quick Reference Guide –Printed copy with laminated pages for outdoor use
included with shipment.
Supplemental Online Help - Concepts and Reference information
http://na.tm.agilent.com/fieldfox/help/
FieldFox Data Link Software and Help –Free download at:
http://na.tm.agilent.com/fieldfox/datalink_info.html
Service Guide –Free download at: http://www.agilent.com/find/fieldfox.
Firmware Updates –Check to see if you have the latest firmware at:
http://na.tm.agilent.com/fieldfox/
Conventions that are used in the Manual
Hardkey indicates a front panel button. The functionality of these buttons
does not change.
The six Softkey menus change dynamically and follow these color conventions:
Softkey Blue indicates an available setting.
Softkey Green indicates a change in menu level when selected.
Softkey Black indicates the default or selected setting.
Softkey Yellow indicates an active entry in process.
Softkey Grey indicates a key that is NOT available.
Safety Notes
The following safety notes are used throughout this manual. Familiarize yourself
with each of the notes and its meaning before operating this instrument. More
pertinent safety notes for using this product are located in “Safety
Considerations” on page 170.
CAUTION
Caution denotes a hazard. It calls attention to a procedure that, if not
correctly performed or adhered to, could result in damage to or destruction
of the product. Do not proceed beyond a caution notice until the indicated
conditions are fully understood and met.
WARNING
Warning denotes a hazard. It calls attention to a procedure which, if not
correctly performed or adhered to, could result in injury or loss of life. Do
not proceed beyond a warning note until the indicated conditions are fully
understood and met.

10 N9912A FieldFox User’s Guide
Preparing for Initial Use of Your New FieldFox
Check the Shipment
When you receive your FieldFox, check the shipment according to the following
procedure:
1. Inspect the shipping container for damage. Signs of damage may include a
dented or torn shipping container or cushioning material that indicates signs
of unusual stress or compacting. If not damaged, save the packaging
material in case the FieldFox needs to be returned.
2. Carefully remove the contents from the shipping container, and verify that
the standard accessories and your ordered options are included in the
shipment according to the Box Contents List.
3. For any question or problems, refer to Contacting Agilent on page 2.
Meeting Power Requirements for the AC/DC Adapter
Voltage: 100 VAC to 250 VAC
Frequency: 50 Hz to 60 Hz
Current: 1.25 –0.56 A
The AC/DC adapter supplied with the analyzer is equipped with a three-wire
power cord, in accordance with international safety standards. The power cable
appropriate to the original product shipping location is included with the
FieldFox.
Various AC power cables are available from Agilent that are unique to specific
geographic areas. You can order additional AC power cables that are correct for
use in different areas. For the power cord part number information please visit:
http://www.agilent.com/find/fieldfox

Preparing for Initial Use of Your New FieldFox 11
Install the Lithium-Ion Battery
Step
Notes
1. Open the battery door.
Push the button on the battery compartment door while sliding the door outward.
2. Insert the battery.
The terminals end of the battery is inserted into the compartment.
3. Close the battery door.
Slide the battery compartment door upwards until it latches.
Battery Usage
When you receive your FieldFox, the lithium-ion battery is not installed, and it is
partially charged to approximately 40% to preserve battery life. A lithium-ion
battery has no memory effect, so it can be used partially charged, as shipped.
A fully charged battery will power your FieldFox for about four hours, so if you
plan to use it for this long, you should fully charge the battery.
NOTE The FieldFox will shut down to prevent the battery from discharging to a level
that is damaging. If this occurs, charge the battery either internally or externally.
Learn more about the lithium-ion battery on page 154.
Battery charge status is viewable:
In the upper-right corner of the screen.
On the Battery screen. To access the screen, select System, Service
Diagnostics, and Battery.
On the battery. Open the FieldFox battery compartment door to view the
battery LCD.

12 N9912A FieldFox User’s Guide
To conserve battery power:
Use Run/Hold to single-trigger a measurement when needed. Hold is shown on
the display.
Press System then Display then Brightness. Use the ▲|▼ arrows, the rotary
knob, or numeric keypad to adjust the brightness to dim the FieldFox display
as much as possible.
Briefly press the power button to switch to Stand By mode when the FieldFox
is not being used. Press again to restore power. All current settings are
preserved.
NOTE When powered by the battery only, the FieldFox can stay in Stand By mode for a
maximum of four hours and then it powers off automatically. When the relative
battery charge drops about 20%, the FieldFox will power off to preserve the
remaining charge.
To recharge a battery:
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.
It can be fully charged externally using the external battery charger (Opt 872)
in about 4 hours.
When the battery is removed, the FieldFox can still be powered by the AC/DC
adapter.
FieldFox ON/OFF Settings
To turn power ON, briefly press the power button. The LED is green. Boot-up
takes about 1 minute.
To switch to Stand By mode (low battery drain), briefly press the power
button. The LED is orange and blinks. To turn power ON, briefly press the
power button. Power and settings are restored instantly. See the Note above
concerning Stand By mode.
To turn Power OFF (very low battery drain), press and hold the power button
until power is OFF - about 4 seconds. The LED is off.
Data and instrument state are NOT automatically saved when the FieldFox is
powered OFF. Learn how to save data and instrument state on page 134.
FieldFox High-Temperature Protection
The following features prevent degradation or damage in the event of high
internal temperatures in the FieldFox.
NOTE Do NOT store the FieldFox in the softcase while powered ON or in Stand By
mode.
How to monitor the internal FieldFox temperature:
Press System, then Service Diagnostics.

Preparing for Initial Use of Your New FieldFox 13
Then Internal Temperatures.
The temperature at which the following events occur is the average of the RF1,
RF2, SB1, SB2 temperatures. These temperatures come from internal sensors
embedded within FieldFox.
Temperature Control Mode
At approximately 73 °C, the FieldFox enters Temperature Control mode by
reducing display intensity and measurement speed. This should decrease the
internal temperature which preserves measurement accuracy and maintains the
long-term reliability of the FieldFox.
When entering Temperature Control mode, save your instrument state and data
that you want to keep.
When the temperature drops to approximately 71°C, normal operating settings
are restored.
NOTE Measurement speed specifications do NOT apply in Temperature Control Mode.
High-Temp Shutdown
In extreme situations, Temperature Control mode may not stop an increase in
the FieldFox internal temperature. At approximately 75°C, High-Temperature
Shutdown will engage and turn OFF the FieldFox.
Just prior to shutdown, the FieldFox will display a warning of imminent shut
down.
Avoid Overpowering the FieldFox
The FieldFox can be damaged with too much power or voltage applied.
Exceeding the maximum RF power levels shown below will cause an ADC Over
Range message to appear on the screen.
WARNING
Maximum Input Voltages and Power:
RF OUT Connector: ±50 VDC,
+23 dBm RF
Exter Trig/Ref Connector: 5.5 VDC
RF IN: ±50 VDC,
+27 dBm RF
DC Input: 19 VDC,
4 ADC
Power Sensor Input: +25 dBm (320 mW) average
+33 dBm peak (2 W) <10μs
+ 5 VDC
NOTE Very often, coaxial cables and antennas build up a static charge, which, if
allowed to discharge by connecting to the FieldFox, may damage the instrument
input circuitry. To avoid such damage, it is recommended to dissipate any static
charges by temporarily attaching a short to the cable or antenna prior to
attaching to the FieldFox.

14 N9912A FieldFox User’s Guide
Take the FieldFox Tour
Front Panel

Preparing for Initial Use of Your New FieldFox 15
Front Panel
No.
Caption
Description
Learn More on Page:
1
Power
ON: press momentarily.
STAND BY: with FieldFox power ON, press briefly.
OFF: press and hold until the FieldFox shuts off (about 4 seconds).
12
2
LED
Not lit: FieldFox OFF, not charging
Green: FieldFox ON. Charging status indicated by battery icon on screen
Orange, flashing: FieldFox STAND BY
Orange, intensity increasing, flashing slowly: FieldFox OFF, charging
12
3
System
Displays a submenu for system setup
142
4
Function keys
Includes: Freq/Dist, Scale/Amptd, BW, Sweep, Trace, Meas
Setup, Measure, and Mode
Refer to specific Mode.
5
Preset
Returns the analyzer to a known state
143
6
Enter
Confirms a parameter selection or configuration
--
7
Marker
Activates marker function
121
8
Mkr→/Tools
Displays a submenu for marker functions
125
9
Esc
Exits and closes the dialog box or clears the character input
--
10
Save/Recall
Saves the current trace or recalls saved data from memory
134
11
Limit
Sets limit lines for quick Pass/Fail judgment
130
12
Run/Hold
Toggles between free Run and Hold/Single operation.
142
13
Cal
Displays a submenu for calibration functions
50
14
Arrow keys
Increases or decreases a value or setting.
--
15
◄Back
Returns to the previous menu selection.
--
16
Rotary knob
Highlights an item for selection, or enables incremental changes to
values.
--
17
Softkeys
Allows selection of settings for configuring and performing
measurements, and for other FieldFox functions.
--
18
Screen
Transflective screen, viewable under all lighting conditions. If you are
using your FieldFox in direct sunlight, you do not need to shield the
display from the sunlight. In bright lighting conditions, the display is
brighter and easier to read when you allow light to fall directly on the
screen. Alternative color modes exist that maximize viewing in direct
sunlight conditions, as well as other conditions such as nighttime work.
Note: Clean the Transflective screen with gentle and minimal wiping
using Isopropyl alcohol applied to a lint-free cloth.
143 - Display settings
17 - Screen Tour

16 N9912A FieldFox User’s Guide
Top Panel
Caption
Description
Learn More
RF OUT
For CAT and NA measurements, use to make reflection measurements.
Maximum: ±50 VDC, +23 dBm RF
CAT Mode on page 19
NA Mode on page 37
Ext Trig/Ext Ref
External Reference connector to connect to an external frequency
reference. Maximum: 5.5 VDC.
Ext Ref on page 148
Ext Trig (SA Mode) on
page 76
RF IN
For CAT and NA mode, use to make transmission measurements.
For SA use to make all measurements.
Maximum: ±50 VDC, +27 dBm RF.
SA Mode on page 58
Side Panel
Caption
Description
Learn More
Ethernet cable connector to read trace data using the FieldFox Data Link Software.
Download the latest version of the software at
http://www.agilent.com/find/fieldfox
Reserved for future use.
DC power connector used to connect to the AC/DC adapter. Maximum: 19 VDC, 4
ADC.
On page 11
Micro Secure Digital slot. Use to extend the memory of the FieldFox.
File locations on page 134
Standard USB connector used to connect a power sensor for Power Meter Mode.
Also used to save files to a USB flash drive.
Use of Keyboard and Mouse is NOT supported.
File locations on page 134
Audio output jack for use with SA Mode Tune and Listen.
On page 69

Preparing for Initial Use of Your New FieldFox 17
Screen Tour
Caption
Description
Learn More on Page:
1
Title –write your own text here
145
2
Current Mode
3
Run / Hold
142
4
Display Format
Mode dependent
5
Scale/division
Mode dependent
6
Calibration Status (CAT and NA)
Detection Method (SA)
50
7
Velocity Factor (Fault Meas)
31
8
Averaging Status and Count
Mode dependent
9
Data / Mem Display (CAT and NA)
Step / FFT (SA)
132- Trace Math
69 - Res BW
10
Resolution Setting
Mode dependent
11
Measurement Start Freq or Distance
Mode dependent
12
Bandpass / Lowpass setting (Fault Meas)
IF BW in NA Mode
31
13
Output Power Level (CAT and NA)
24
14
Measurement Stop Freq or Distance
Mode dependent
15
Actual Sweep Time
Mode dependent
16
Limit Line Status
130
17
Time and Date
148
18
Marker Readout
121
19
Battery Status
154
20
Measurement Type (CAT and NA)
21
Reference Level
Mode dependent
22
Reference Position
Mode dependent

18 N9912A FieldFox User’s Guide
How to Enter Numeric Values
Many settings on the FieldFox require the entry of numeric values.
How to enter numeric values
Use any combination of the following keys:
Numeric 0–9 keys, along with the polarity ( +/-) key.
Up/Down arrow keys to increment or decrement values.
Rotary knob to scroll through a set of values.
Back erases previously entered values.
Esc exits data entry without accepting the new value.
To complete the setting:
Press Enter or a different softkey or hardkey.
Multiplier Abbreviations
Many times after entering numeric values, a set of multiplier or suffix softkeys
are presented. The following explains the meaning of these abbreviations.
Select Frequency multipliers as follows:
GHz Gigahertz (1e9 Hertz)
MHz Megahertz (1e6 Hertz)
kHz Kilohertz (1e3 Hertz)
Hz Hertz
Select Time multipliers as follows:
s Seconds
ms milliseconds (1e–3)
us microseconds (1e–6)
ns nanoseconds (1e–9)
ps picoseconds (1e-12)

CAT (Cable and Antenna Test) Mode 19
CAT (Cable and Antenna Test) Mode
CAT Mode is typically used to test an entire transmission system, from the
transmitter to the antenna. This process is sometimes referred to as Line
Sweeping.
CAT Mode is similar to NA (Network Analyzer) Mode. Learn more in the
Supplemental Online Help: http://na.tm.agilent.com/fieldfox/help/
CAT Mode Distance to Fault measurements are discussed on page 28.
In this Chapter
Measurement Selection.........................................20
Quick Settings ........................................................21
Frequency Range ...................................................21
Scale Settings .........................................................22
Averaging ...............................................................22
Single/Continuous .................................................23
Resolution ...............................................................23
Sweep Time.............................................................24
Output Power .........................................................24
Interference Rejection ..........................................24
Procedures
Return Loss Measurement ...................................25
1-Port Cable Loss Measurement..........................26
2-Port Insertion Loss Measurement ...................27
Distance to Fault Measurements.........................28
See Also
All about Calibration.............................................50
Set Markers...........................................................121
Use Limit Lines ....................................................130
Use Trace Math ....................................................132
Making 75Ω (ohm) Measurements at the FieldFox Supplemental Online Help:
http://na.tm.agilent.com/fieldfox/help/

20 N9912A FieldFox User’s Guide
CAT Mode Settings
Select CAT Mode before making any setting in this chapter.
How to select CAT Mode
Press Mode.
Then CAT.
Measurement Selection
How to select a CAT Mode Measurement
Learn more about the following measurements in the Supplemental Online
Help: http://na.tm.agilent.com/fieldfox/help/.
Press Measure 1.
Then choose one of the following: These softkeys also appear after CAT Mode
is selected.
oDistance to Fault 1-port reflection measurement that uses Inverse Fast
Fourier Transform (IFFT) calculations to determine and display the distance
to, and relative size of, a fault or disruption in the transmission line. Units
are in return loss format, expressed as a positive number in dB, unless the
measurement selected is DTF (VSWR). Learn more about DTF Measurements
on page 28.
oReturn Loss & DTF Displays a Return Loss measurement in the top plot
and a Distance to Fault measurement in the bottom plot. Use this format to
display the frequency settings that are used to make the DTF measurement.
Learn more about Bandpass Mode on page 30.
NOTE All plot settings, such as Scale, Markers, and so forth, are made to the DTF
(bottom) plot, NOT to the Return Loss (top) plot. However, the frequency
range of the Return Loss plot can be changed using the Alternate Sweep
setting. Learn more on page on page 34.
oReturn Loss 1-port reflection measurement that displays the amount of
incident signal energy MINUS the amount of energy that is reflected. The
higher the trace is on the screen, the more energy being reflected back to the
FieldFox. Learn how to measure Return Loss on page 24.
oVSWR (Voltage Standing Wave Ratio –also known as SWR) 1-port reflection
measurement that displays the ratio of the maximum reflected voltage over
the minimum reflected voltage. The higher the trace is on the screen, the
more energy being reflected back to the FieldFox.
oDTF (VSWR) Distance to Fault in VSWR format.
o1-Port Cable Loss 1-port reflection measurement that displays the loss of a
transmission line. Learn more on page 24.
o2-Port Insertion Loss (Option 110 ONLY) 2-port transmission measurement
that accurately displays the loss through a cable or other device in dB. Both
ends of the cable must be connected to the FieldFox. NO phase information
is included in this measurement. Learn more on page 27.