Telex PST-170 manual Enhanced Dynamic Range E.D.R. Operation, Change Lock Out

Enhanced Dynamic Range (E.D.R.) Operation

The Telex PST-170 Transmitter is equipped with E.D.R., En- hanced Dynamic Range (companded) audio. This mode greatly improves the Audio Signal to Noise Ratio when used with the Telex Model SR-400 receiver. The E.D.R. mode must be selected on both the transmitter and receiver to be effec- tive.

1.To engage the E.D.R. function turn the PST-170 off with the toggle switch.

2.Press and hold the SET button while you turn the PST-170 back on. The E.D.R symbol will be display in the lower right corner to indicate the mode is active.

3.Repeat the procedure to turn off the E.D.R. function.

Change Lock Out

The PST-170 SET button can be locked to prevent E.D.R. activation, and unintended channel changes.

1.To engage the Lock Out Feature, press the SET and ARROW buttons at the same time and hold them down for 10 seconds.

2.The padlock symbol will appear and the set button is disabled.

3.To unlock the system, press the SET and ARROW buttons and hold them for 10 seconds or until the padlock symbol dis- appears.

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