15
Gossen Metrawatt GmbH
METRACABLE TDR PRO
11. Optional: determine cable length. Move the cursor to the end of the trace where either
the reflection curve for “open end” or “short-circuit” is displayed (
16). The displayed
cursor position corresponds to the length of the cable.
12. Optional: ascertain and analyze any detected reflection curve(s)
13. Optional: save your measurement.
Open the TDR menu to this end by pressing and holding the
SEL
key.
Navigate with the
and
scroll keys until the
Save
function is selected. Acknowledge by pressing the
SEL
key. Enter a name with the help of the
and
scroll keys. Acknowledge by pressing the
SEL
key. The measurement is saved to memory.
14. Switch the METRACABLE TDR PRO off by pressing the
ON/OFF
key.
The instrument is switched off.
15. Remove all measurement cables from the cable under test and from the instrument.
16. Optional: Transfer the measurements to METRACABLE MANAGER software for further
evaluation and storage
Measurement has now been completed.
5.3
Measuring Coaxial Cables
A BNC adapter is included with the instrument for the measurement of coaxial cables.
Attention!
!
The BNC adapter may only be used for low-voltage systems.
The coaxial cable to be measured is voltage-free.
1. Connect to the BNC adapter’s banana plugs to the banana jacks on the instrument
2. Connect the BNC adapter’s coaxial plug to the coaxial cable to be measured.
3. Perform the measurement
13. Skip the steps described in the
procedure for connecting the test leads.
5.4
Additional Functions
AUTO Test Function
The AUTO Test function determines the impedance of the cable to be measured (up to the
first impedance change, i.e. up to the first reflection which results from, for example, a cable
end or a short-circuit.).
Prerequisite: The cable is longer than 10 meters.
Briefly press the
ESC
key during measurement in order to use the AUTO Test function
(
Freeze
The freeze function can be used to “freeze” the momentary measurement at the display. This
makes it possible to view and evaluate the TDR trace at leisure.
Proceed as follows in order to freeze the TDR trace during measurement:
