Fluke TS54-A-09-TDR - Velocity of Propagation (VOP)

22
TS54TDR PRO Test Set
Users Guide
Speaker and Handset Receiver Volume for
Talk Mode
In Talk mode, you can press C D to adjust the
volume of the speaker or handset receiver when they
are on, or you can set the volume levels in the Settings
menu:
1 Press Q.
2 Press M, press C to put the flashing cursor next
to
Settings, then press M again.
3 Press D to put the flashing cursor next to
Handset Vol or Spkr Vol, then press M.
4 Press R or L to change the volume.
5 To save your selection before you exit or go back
to the main menu, press M. The display shows
Saved.
To go back to the previous menu, press Q. Or,
press C or D until Back shows, then press
M.
Note
In Talk mode, when the handset receiver or the
speaker is on and you press
C D to adjust
the volume, the level you select also changes
the level in the Settings menu. In Monitor
mode, the
C D keys change the volume
levels for the ringtone and speaker, but do not
change the levels in the Settings menu.
Velocity of Propagation (VOP)
The test set uses the VOP value to calculate length for
the TDR function. See "Time Domain Reflectometry
(TDR) Technology" on page 23.
You can set the VOP to a known value, or you can use
the test set to find the VOP for a known length of
cable.
Note
The default VOP value of 66 is satisfactory for
most applications. See "VOP Variations" on
page 25.
To set the VOP to a known value:
1 Press Q.
2 Press M, press C to put the flashing cursor next
to
TDR, then press M again.
3 Press D to put the flashing cursor next to VOP
Setting
, then press M. to select VOP.
4 Use the numeric keypad to change the VOP value.
For example, to enter a VOP of 71, press 7 1.
5 To save your selection before you exit or go back
to the main menu, press M. The display shows
Saved.
To go back to the previous menu, press
Q. Or,
press D to select Back, then press M.
To find the VOP of a known length of cable, change
the VOP setting until the test set shows the correct
length:
1 Connect the test set to a known length of cable.
The cable must be 200 feet (60 meters) or longer.
2 Press t. The test set shows the length of the
cable.
3 Press M, press C to put the flashing cursor next
to
TDR, press M again, press D to put the
flashing cursor next to VOP Setting, then
press M again.
4 Press R or L to change the VOP setting, then
press M. If you increase or decrease the VOP by
1, the length measurement increases or decreases
by approximately 1.5%.
5 Do steps 2 through 4 again, until the length
measurement is correct.