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• MODE: The top line of the display shows what cable
type is being tested; voice (RJ11/RJ12)
(F-terminated coax)
Hub Blink mode
or Tone mode
4
• PASS/SPECIAL CABLES: 'Pass'
if the cable is a properly wired 4-pair T568A/B data
cable, a 3-pair one-to-one wired voice cable or a
video cable with no faults. In addition, 'X-over'
illuminates if a properly wired cross-over (uplink)
cable is recognised, or 'Rev'
cable is a properly wired reverse-pinned voice cable.
The wire map will show actual pin connections.
'Shielded'
illuminates when a shielded data cable
9
is properly connected at both ends. It will be flashing
if there is a short to a wire in the cable along with that
pin number and the 'Short'
• CABLE FAULTS: 'Fail'
wires making conductive contact)
not making connection at both ends of the cable)
type of fault(s) detected. See WIRING AND DISPLAY EXAMPLES section for wire standards and failure modes.
• VOLTAGE CHECK: A check for voltage on the RJ45 terminated data cable is performed before each test, and if
found, no test is run. If a voltage is detected on any of the tester connectors, the lightning bolt icon
illuminates. The tester should be disconnected immediately from the source of the voltage.
• MEASUREMENT:
15
• LOCATION ID:
The remote ID number will display here.
16
• BATTERY STATUS: The battery low icon
illuminate when the battery needs to be replaced. Results may be unreliable at this point.
• TESTER-END WIRE MAP:
to the pins on the remote-end shown directly below them on the LCD
• REMOTE-END WIRE MAP:
indicate shorted pins. No pin numbers displayed on this row line are open pairs.
• PoE INDICATORS:
20
• PoE ERROR INDICATOR:
LENGTH MEASUREMENT: The VDV Scout
length. One end of the cable should be connected to the corresponding port on the top of the tester. The other
end should be left disconnected or attached to the self-storing remote.
LENGTH CONSTANT: The length constant refers to the electrical characteristic of a cable used to characterise
its length. Every cable has an associated length constant in units of picofarads per foot (pF/ft). Setting the length
constant on the tester is important for obtaining an accurate cable length measurement from the VDV Scout
3. The default length constants are as follows: Voice: 17.0 pF/ft
The length constant can sometimes be provided by the manufacturer of the cable (see DISPLAYING/EDITING LENGTH
CONSTANT section). You may have to determine the length constant yourself (see DETERMINING AN UNKNOWN
LENGTH CONSTANT section). Length constants can range from 10 pF/ft to 40 pF/ft.
Measurement accuracy is dependent on how close the tester can be set to the length constant of the cable being
measured and the consistency of the cable along its length.
The length constant can vary from cable to cable, even if it is of the same type, produced by the same manufacturer. It
can also vary over the length of one cable, because the length constant is dependent on the physical properties of the
cable, which may not be consistent throughout the entire cable. The change in wire-pair spacing through the cable can
vary the length constant along the length of the cable.
When setting the length constant using a length of cable, the cable should be at least 50' (15.2 m) long. This will yield
a ±5% uncertainty (1 in 50) in the length constant accuracy. A longer cable reduces this uncertainty.
MEASURING LENGTH – VOICE OR DATA CABLES:
1. Press the Power button
2. Connect one end of the cable to the appropriate port: RJ45 port
(if testing data cable) or RJ12 port (if testing voice cable), located at the top
of the main tester body. Leave the other end of the cable unterminated.
3. Press the Length button
4. Press the Data button
depending on the cable being tested, to begin the test.
5. Press the Data button
should be measured. The first functional pair is chosen by default.
6. Read the length measurement as shown.
MEASURING LENGTH – COAX CABLES:
1. Press the Power button
2. Connect one end of the cable to the F-connector port
located at the top of the main tester body.
Leave the other end of the cable unterminated.
3. Press the Length button
4. Press the Video button
5. Read the length measurement as shown.
4
1
, video
or data (RJ45)
, and if
3
5
is activated.
2
will be displayed
6
8
illuminates if the
indicator.
11
10
will illuminate only if the cable is not wired to one of the cabling standards. 'Short' (two
, 'Split' (wire pairs not maintained as pairs when terminated)
11
Length mode: Length of cable run in feet or metres. PoE mode: Voltage.
17
illuminates when the battery is nearing depletion. The icon will
18
Displays the pins on the tester end of the cable in order. These pins are mapped
19
Displays the corresponding pin on the remote-end. Dashed lines on this row
Indicate PoE configuration. See the chart on page 10 for details.
Indicates no PoE detected when the test is initiated.
21
OPERATING INSTRUCTIONS
Pro 3 uses the capacitive properties of a cable to measure its
TM
to turn the tester on.
G
F
to enter Length mode.
C
or Voice button
A
repeatedly to select the pair of wires that
C
G
to turn the tester on.
F
to enter Length mode.
B
to begin the test.
DISPLAY
1
6
Pass X-over Rev
10
Fail Short Split Open
12
7
14
15
1 2 3 4 5 6 7 8
18
19
, or a combination of these will also illuminate to indicate the
13
Data: 15.0 pF/ft
,
NOTE: A voice or data cable under test can be
unterminated (open) or terminated by an RJ45
ID remote. If it is terminated by the self-storing
remote, the reading will be 1' or 2' greater
than the actual measurement. In this case,
subtract 1' or 2' from the reading to obtain the
actual measurement. The coax cable under test
may be left unterminated.
11
2
7
3
8
13
Shielded
m
ID
ft
Video: 15.0 pF/ft
Test Running
Remote ID No.
Continuously
(if terminated)
Measured Length = 45 ft.
4
9
5
20
A
PoE
+
B
16
21
17
, 'Open' (wires
12
14
Pro
TM
Cable
Type
Indicates
Shielded
cable
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