Atec JD725A User Manual
COMMUNICATIONS TEST & MEASUREMENT SOLUTIONS
JD725A
Cable and Antenna Analyzer - Dual Port
Key Features
Portable and lightweight handheld instrument•
Built-in wireless frequency bands as well as the most commonly •
used RF cable types
Touch-screen 7” TFT color display •
Superior immunity to RF interferences•
Up to 1001 data points for high resolutions and long distance •
problem location
USB port, allowing external USB memory device•
Saves up to 400 measurement traces•
Saves up to 100 measurement screens•
Saves up to 20 user denable setups•
Interface with application soware, JDViewer, for data •
management and report creation
On-screen keyboard permitting saving les quickly and easily•
Rechargeable and eld replaceable lithium-ion battery•
Key Measurements
VSWR•
Return Loss•
DTF (Distance to Fault)•
Cable Loss•
Insertion Loss •
Insertion Gain•
Power Meter•
RF Source•
Advanced Functions
Trace overlay allows comparative analysis •
of up to 4 traces in a single measurement
screen.
In addition to its 6 markers it also provides •
up to 3 Marker Bands.
Reection measurements are presented in •
VSWR, Return Loss or Smith Charts.
Introduction
Many of modern wireless base stations are a complex system of multiple RF components such as
Low Noise Amplifiers (LNA), duplexers and Tower Mounted amplifiers (TMA). The performance
of those RF components directly affects cell site’s coverage and capacity. It is essential to have the
right instrument to service and verify the proper functionality of those components.
The JD725A has all of necessary measurements functions to perform RF component measurements including, insertion gain, insertion loss, antenna isolation, TMA performance and duplexer
antennas verification.
In addition, the JD725A accurately characterizes the site’s antenna system including Voltage Standing Wave Ratio (VSWR), Distance To Fault (DTF), cable loss and power measurements.
The JD725A is an easy to use field instrument, equipped with a touch panel color display allowing rapid measurements and obtaining results clearly displayed. Its application software, JDViewer,
allows the user to easily compare and analyze measurements and generate professional reports.
The JD725A was designed for field testing operation and is equipped with a rechargeable field
replaceable Lithium-Ion battery which enables continuous operation for more than three hours.
WEBSITE: www.jdsu.com/test
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SERIA L
D-sub serial
interface port to
connect an optional
external power
sensor
USB Host
USB Mem ory Stick
port, used for either
saving measurement
data or upgr ading the
instrument’s firmware
LAN
Ethernet
Communication Port
To connect a PC with
the application SW
RF Out/Reflect ion
50ohm N-type RF Connector
to measure VSWR, DTF and
One port cable loss
DC 15V IN
External DC
input port
RF In
50ohm N-type RF Connector, in conjunction with
RF Out/Ref lection port, to measure amplifier
gain and cable insertion loss
USB Client
USB Po rt to
connect a PC with
the application SW
7 “ COLOR LCD
Daylight viewable
high resolution LCD
display
SCRE EN MENU
Displays selectable
menu in connection
with function keys or
sof t ke ys
ESC
Cancels latest
selection or moves
to previous menu
SPEAK ER
Generates audio, if
enabled, for alarms and
key selections
KNOB & UP/DOWN
Mov es marker positions
of items on the table list
ENT ER
Finishes an
“entry”,
wh ich is
value or test
parameter
AUTO SCALE
Adjusts Y scale on
screen for optimal
display of traces
TRACE POINT
Selects trace points among
126, 251, 501 or 1001
TRACE
Captures up to 4 traces
Assign saved trace to T race #
FR EQ / D IST
Sets frequency range or selects a
standard or custom frequency band.
Sets distance and selects standard or
custom cables
MARKER
Supports six ma rke rs
for each tr ace
LOA D
Recalls saved
traces to compare
with current or other
saved traces
POWER & LED
Power ON/OFF
Green LED:
Power On status
Red LED:
External power
CAL
Performs
calibration for
VSWR, DTF,
Cable Loss and
Gain /Loss
measurements
SYSTE M
Pr esent s syst em
information or
upgrades the
instrument's firmware
POWER M ETER and
SIGNAL GENERATOR
Measures transmission
power and generates a
CW signal
GAI N/ LOSS
Measures amplif ier
gain and cable
insertion loss
VSWR
Measures impedance
matching
DTF
Measures distance
to fault location
HOL D
Pauses current
measurement display
SCALE
Changes Y-axis
scal e, VSWR or
Return Loss or
Smith Chart
PEAK
Identifies the highest
peak of the trace
LI GHT
Sets LCD Brightness
AMP
Sets Y-a xis M in /Max,
limit and limit level
SAVE
Save s scr een ,
tr ace, and setup
SOFT KEY
Selects menu
displayed
on the screen
Panel Overview
Top View
Front View
JD725A CABLE AND ANTENNA ANALYZER
JD725A CABLE AND ANTENNA ANALYZER
3
Main Functions
VSWR / Return Loss
VSWR and Return Loss measurements provide the impedance performance and signal reflection characteristics of cable, connectors, and
antenna systems.
Frequency range: 25 to 4000MHz•
Dynamic Range: 60dB•
Over 80 wireless frequency bands built-in in the instrument’s data-•
base
Flexibility to incorporate additional frequency bands•
User denable limit line for•
DTF (Distance to Fault)
The DTF measurement function allows user to accurately identify faulty
locations.
Frequency range: 25 to 4000MHz•
Distance: Up to 1250m (4125)•
Dynamic Range: 60 dB•
High resolution mode with 1001 points•
Over 95 cable types built-in in the instrument’s database•
Flexibility to incorporate additional cable types•
User denable limit line for fast Pass/Fail characterization•
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