Multifrequency locating arrangement with frequency designation
In a system in which a transmitter is moved through the ground in a region, the system including a locating arrangement for tracking the position of and/or guiding the transmitter as the transmitter moves through the ground, a locating arrangement includes a configuration, forming part of the transmitter, for transmitting a locating signal at a current one of at least two locating frequencies and for transmitting a frequency designation identifying one of the frequencies of the locating signal. A locator receives the frequency designation and the locating signal for use in tracking the transmitter and a frequency tracking arrangement switches the locator between different ones of the locating frequencies, as the current locating frequency, based on said frequency designation. In one feature, the locating arrangement is configured for automatically switching between the frequencies based on the frequency designation.
1. In a system in which a transmitter is moved through the ground in a region, said system including a locating arrangement for tracking the position of and/or guiding the transmitter as the transmitter moves through the ground, said locating arrangement comprising:
a configuration, forming part of said transmitter, for transmitting a locating signal at a current one of at least two locating frequencies and for transmitting a frequency designation identifying one of said frequencies of the locating signal; and
a locator which receives the frequency designation and the locating signal for use in tracking the transmitter and including a frequency tracking arrangement for switching the locator between different ones of the locating frequencies, as the current locating frequency, based on said frequency designation.
2. The locating arrangement of claim 1 wherein said locator is configured for automatically switching between said frequencies based on said frequency designation.