Fluke TS54-A-09-TDR - Page 11

7
Physical Characteristics
N
The N key operates only when the test set is off-hook. When you use the test set as a
handset, you can press N to turn off the handset’s microphone. This is useful in noisy
environments such as near heavy traffic. With the mute on, ambient noise is not picked up by
the test set’s microphone and therefore not transmitted to the receiver. When the mute is on, it
is easier to hear the person at the other end of the line and easier to hear static or noise on the
line. To turn on the microphone, press
N again.
When the test set is off-hook and is in Speakerphone mode, you can press N to turn off the
speakerphone’s microphone and temporarily put the test set into a Receive-Only Loud Speaker
mode. This is a better mode for troubleshooting because it prevents the speaker from cutting
out when a medium to loud noise occurs in your vicinity. To turn on the speakerphone
microphone, press
N again.
You can set the Receive-Only Loud Speaker mode to be default mode (see "Make Receive-Only
Loud Speaker Mode the Default" on page 20). In this mode, the N key has no effect.
When the test set is muted, MUTE shows on the display.
F
This is key has two functions. It performs the “flash” function when the test set is in Talk mode.
It performs the “pause” function when the test set is in Monitor mode. The flash function is not
available in Monitor mode and the pause function is not available in Talk mode.
If the test set is in Talk mode and is off-hook and you press F, the test set generates a flash
signal. The default flash duration is 500 ms. To change the duration, see "Hook Flash Duration"
on page 20.
The pause function is available when you enter numbers into the speed-dialing memory. If you
press F, a 4 second pause is inserted into the number you are entering. See "Putting a Pause
in a Stored Number" on page 14. To change the duration, see "Pause Duration" on page 20.
Note
When you press
F, a comma shows on the display.
t
On the TS54 TDR test set in Monitor mode, press t to do the TDR test. The TDR test
measures the distance to the first short or open on the cable. See "Using the TDR" on page 16.
The
t key does not operate in Talk mode.
Note
If the test set cannot do a TDR test on the line when you press
t, the test set will do
a Line Verification test.
-continued-
Table 2. Keys (continued)