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Second, the phase of the signal applied to the cable is grounded at the other end.
Third, adjust the frequency, turn on the low frequency to high frequency.
5) when power is turned on, it is low, and the detection can choose power gear
according to the situation.
3. Signal search and tracking: (receiver)
1) Receiver carry in hand, to relax the body's natural prolapse, wrist arm thumb
operation key, leave the signal points in a certain distance, the purpose is to avoid
grounding and ground, avoid obstacles, such as power distribution cabinet and
buildings.
2) According to the power switch, the mode selection wave peak (the initial peak of
the startup is the wave peak, which can not be selected) is corresponding to the
transmitter, which is applied to the signal, and the head points to the starting point of
the cable. And around the beginning of the search signal. The initial gain of the boot is
60dB, and in this gain, if the three digits of the signal are searched to show 99.9, it
indicates that the grating is full, then the gain is reduced, and the number is displayed
at about 75.0. The gain unchanged at this time to continue to search again, if three
digital display 99.9 shows the signal search for better than last time, here again drop
gain make digital display again to 75.0 or so, so search for a circle, finally determine
the smallest gain, the strongest signal is below the cable position of a point. This
process is a secondary magnetic field that is radiated by the cable that is searching for
the transmitted signal, and excludes the secondary magnetic field of the non-target
cable.
3) Keep the current gain is changeless, based on the received signal strength (three
digits) to that point axis of rotation receiver, the received signal will abate, according
to the rotation when reduced to the weakest, the nose pointing and cable at this point
into the direction of the 90 ° Angle. Continue to turn the receiver, the received signal
will have enhanced with rotation, when the increase to the basic value and phase at
the same time, the nose pointing in the direction is the path of the cable, along the
nose pointing to trace the strongest signal and detect the exact path of the cable, this
process is the signal tracking, can detect the path at the same time.
4.1.2 Coupling legal detection path
1. Coupling conditions
1) Cables must have known exposure points.
2) The two ends of the cable must have a place or point connected to the ground.
