Testing Using A Time Domain Reflectometer (Tdr) - Honeywell EXPERION PKS Installation Manual

6.3

Testing using a Time Domain Reflectometer (TDR)

A Time Domain Reflectometer (TDR) is required to perform these tests. Two potential TDRs for use with
these procedures are the:
Tektronics 1502, which has a range of 0 to 2000 feet with a 6 in resolution.
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Tektronics 1503, which has a range of 0 to 50,000 ft with a 3 ft resolution
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Setup your TDR cable tester as indicated in the following table.
Parameter
Power
Return Loss (0 to 60 dB)
Return Loss (Fine)
Feet/Div (Red) (X10/X100)
Feet/Div (50 to .5)
Noise Filter
Position & Fine
Intensity
Focus
Distance
Impedance 50 Ohms
Impedance 75 Ohms
Impulse Width 100 nsec
Impulse Width 100 nsec
Impulse Width 1000 nsec
Cable Dielectric Solid Poly
Cable Dielectric Foam Poly
Cable Dielectric Var
Zero Ref (Set)
0 dB Set
CAUTION
To ensure valid testing, please observe the following cautionary notes:
Table 6.1 Time Domain Reflectometer (TDR) Setup
Chapter 6 - Testing ControlNet Trunk Cables
Setting
On (or Out)
0 dB (or Sensitivity)
0 dB (or Sensitivity)
X10
.5
Out
Base Line in Center
As required
As required
000
Out
In
In (or Short Pulse)
Out (or Medium Pulse)
Out (or Long Pulse)
Out
In (or .79 Distance Cal)
As is
First Pulse on Left of Screen
As is
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