CATV Quick Start Guide
Cable
Fault Location
Start Distance
Stop Distance
Full Band Cal
Agilent Technologies
8712ET/ES and 8714ET/ES
Agilent Part Number 08714-90021
Printed in USA June 2000
Supersedes October 1998
© Copyright 1998–2000 Agilent Technologies, Inc.
This quick start guide provides basic instructions on how to make measurements that test the quality
of coaxial cables. Refer to the Option 100 Fault Location and Structural Return Loss Measurement
User’s Guide Supplement for more detailed information. Also, please refer to your analyzer’s User’s
Guide for safety, warranty, and assistance information.
NOTE This quick start guide assumes the use of an 8712ET or 8714ET. If you are using an 8712ES or 8714ES,
some key presses and displays will be slightly different.
To Make a Fault Location Measurement
1. Choose the measurement parameters or recall an instrument state.
PRESET BEGIN
XX
ENTER
2. Calibrate the analyzer. 3. Connect the equipment.
CAL
XX
ENTER
-1-
4. View the fault location results. 5. Interpret the measurement / save results.
Marker Search
Max Search
Mkr−> Max
Define Save
Data ON
Prior Menu
Save State
Cable
SRL
Full Band Cal
MARKER
SAVE RECALL
To Make an SRL Measurement
1. Select SRL measurement function.
PRESET BEGIN
2. Calibrate the analyzer. 3. Verify the calibration.
CAL
Leave load connected.
Directivity is good if trace is below −50 dB.
Wiggle (move) the test-lead cable. The test-lead
cable is good if the trace remains stable.
-2-
4. Connect the equipment. 5. Measure the connector.
Cable
SRL
Connector Model
Measure Connector
Cable
SRL
SRL Cable Scan
Marker Search
Max Search
Mkr−> Max
Define Save
Data ON
Prior Menu
Save State
BEGIN
6. Scan the cable. 7. Interpret the measurement / save results.
BEGIN
MARKER
SAVE RECALL
-3-
If Measurement Results Were Poor
Cable
Fault Location
Velocity Factor
Cable Loss
The following results indicate some specific problems you may encounter. The 2nd and 3rd
problem/solution are displayed using the “connector fault” feature. Refer to your Option 100 User’s
Guide Supplement for more information.
Problem 1 Solution 1
The measured amplitude and distance of a 1000
ft. cable are wrong. (Cable is not terminated in
this example.)
Change the “velocity factor” and “cable loss”
values to the values specified by the cable
manufacturer.
BEGIN
Problem/Solution 2 Problem/Solution 3
The cable is bent near the connector (indicated
by the 2nd bump in the “connector fault”
response).
The cable connector is failing or the cable is
poorly prepared. Connector compensation fails
to improve response.
CAL
Solution: Remove the bend.
Solution: Clean or replace the connector.
-4-
Loading...