Phonic Ear PE 420E User Manual page 4

master emitter: PE 420E (cont'd)
1 mounting hole
2 3-mode performance indicator
Solid = normal
Flashing 1x/sec = inoperative diodes –
Flashing 3x/sec = attenuation switch is
3 attenuation switch
4 line input (0.25in jack)
5 line output (BNC jack)
6 power
7 transmission frequency switch
call for service
set improperly – see 3A
2