AKG Acoustics PT 4500 manual Lock mode, referring to section

		3 Setting Up
9.	To switch the transmitter into LOCK mode, switch the transmitter OFF and back ON in
	LOCK mode, referring to section 3.4.2.
1.	To move from the Preset to the Frequency menu, turn the setup switch briefly to the left. 3.6.2 Frequency Menu
	Press Setup briefly. The display will change like this:

2.To increase the frequency by 25 kHz, turn the setup switch briefly to the right. To decrease the frequency by 25 kHz, turn the setup switch briefly to the left.

3.Having set the desired frequency, push the setup switch briefly. This brings up the fol- lowing screen:

4a If you want to save the selected frequency, push the setup switch briefly. Your setting will be saved in memory and the display will change as follows:

4b If you'd rather not save the selected frequency, briefly turn the setup switch to the left or right. This brings up the following screen:

-Push the setup switch briefly. The transmitter will stay tuned to the original frequency.

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