BASIC OPERATIONS
65
Fig.58
In Fig.59 the result of testing of a telephone line at
consecutive connection to one wire of
the central pair
is presented. Responses are detected on all pairs with wire #4. Level of the
second harmonic exceeds the level of the third that speaks about connection of electronic device.
Consistently connected telephone radio transmitter can be such device.
Fig.59
7.4. BASIC OPERATION #4
DETECTION OF HETEROGENEITY IN THE CABLE
Purpose of basic operation
- detection of the devices which are connected to cables which
are identified by the REF as heterogeneity.
Objects to test:
telephone cables;
LAN cables;
coaxial TV cables;
other low-current cables.
The used device - REF
