9
How to Select the Modes of Operation
Normal Test Mode
When you turn on the tester, it is in normal mode:
The display, LEDs, and beeper operate as described
in Table 1 and the unit has a deadzone of zero.
To turn on the 50-foot deadzone test mode (50
feet or 15 meters from tester), press
Z
.
To turn the bridge tap filter (
BT FILTER
), press
Z
again once the tester is in deadzone test mode.
Press
Z
again to return to normal test mode.
Deadzone Test Mode
Deadzone test mode ignores the first 50 feet of cabling
when testing a cable. The purpose of this mode is to
allow you to skip events in the first 50 feet (15 meters)
from a terminal or crossbox - events such as splices or
other expected or visually apparent events on the
cable.
To enter the 50-foot deadzone test mode from normal
test mode, press
Z
. If you are in feet mode, the display
will show
d 50
and then the TDR results. If you are in
meters mode, the display will show
d 15
and then the
TDR results.
If the cable you are testing measures less than 50 feet
(15 meters), the tester is unable to report any events
and will display -
Err
since it is unable to see the end of
the cable. To measure a cable length shorter than 50
feet or to locate events in the first 50 feet (15 meters),
return to Normal Mode by pressing the
Z
twice.
Bridge Tap Filter Test Mode
Bridge tap filter test mode skips the first bridge tap on
a cable to locate the second bridge tap on the cable.
The first bridge tap could be located anywhere on the
cable. To “see” past the first bridge tap, activate the
bridge tap filter.
To enter the bridge tap filter test mode from normal
test mode, press
Z
twice. The red BT FILTER LED will
be lit.
To exit bridge tap filter test mode, press the
Z
button
once. The red BT FILTER LED will go off.
VOP Mode
In VOP mode you can quickly change and monitor the
VOP value that the tester uses. This mode is useful
when you change from one cable type to another, or
when you initially characterize a cable.
To enter the VOP mode:
Turn off the tester, then hold down
Y
or
Z
while you
press and release the
ON/AUTOTEST
key.
In VOP mode:
The display alternates between the measured
length and the VOP setting.
To change the VOP, press
Z
to increase, or
Y
to
decrease the VOP value shown. The VOP value
shows two digits or three digits. See “VOP” below.
The bridge tap detection, bridge tap filter, and
auto-shutoff features are disabled in this mode.
To exit the VOP mode:
Turn off the tester, then turn it on again.
Setup Mode
This mode lets you select units of measurement (feet or
meters), and reset all parameters to factory defaults.
To enter setup mode
:
Turn off the tester, then hold down both arrow buttons
for 3 seconds while you press and release the
ON/
AUTOTEST
key. To select the setting you want (feet or
meters), press the
Y
button.
