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En hanced Dy namic Range (E.D.R.) Op er a tion
The Telex ST-300 and PST-170 Trans mit ters are
equipped with E.D.R., En hanced Dy namic Range
(companded) au dio. This mode greatly im proves the
Au dio Sig nal to Noise Ra tio when used with the
Telex Model SR-400 re ceiver. The E.D.R. mode
must be se lected on both the trans mit ter and re -
ceiver to be ef fec tive.
1. To en gage the E.D.R func tion turn the SR-400
off with the vol ume con trol thumb wheel.
2. Press and hold the SET but ton while you turn the
SR-400 back on. The E.D.R. sym bol will be dis -
played in the lower right cor ner to in di cate the
mode is ac tive.
3. Re peat the pro ce dure to dis able the E.D.R. func -
tion.
Change Lock Out
The SR-400 SET but ton can be locked to pre vent
E.D.R. ac ti va tion, and un in tended chan nel changes.
The High Fre quency Em pha sis but ton will re main
ac tive at all times for the con ve nience of the user.
1. To en gage the Lock Out Fea ture, press the SET
and but tons at the same time and hold them
down for 10 seconds.
2. The pad lock symbol will ap pear and the set but -
ton is dis abled.
3. To un lock the sys tem, press the SET and but -
tons and hold them for 10 sec onds or un til the
pad lock symbol dis ap pears.
Low Bat tery In di ca tion
1. When there is ap prox i mately 10% of the bat tery
life left, a bat tery sym bol will flash al ter nately
with the chan nel let ter in the LCD dis play.
2. When there is only 5% bat tery life left, the bat -
tery sym bol will con stantly flash in the dis play.
Low Bat tery Dis play
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E.D.R.E.D.R.