14
7. Connected load values
Headset: Ex-TRA 300 A
Ex-TRA 300 B
Ex-TRA 300 C Ex-TRA 300 D Ex-TRA 300 E Ex-TRA 300 F
Ui
8.4 V
8.4 V
6.4 V
5.56 V
4.1 V
Ii
3.55 A
1.2 A
1.2 A
4.71 A
7.8 A
Ic
-
-
-
1.114 A
1.114 A
Pi
29.85 W
10 W
7.68 W
2.1 W
4.68 W
Ci
Negligible
Negligible
Negligible
Negligible
4.99 uF
Li
2.8 uH
20 uH
20 uH
2 uH
0 uH
8. Functional description/operating instructions
Please read these operating instructions carefully so that you are familiar with,
and are able to use, all of the functions of your Ex-TRA 300 Headset . For
your own safety and information please read through the instructions on the
following pages!
8.1 Ex-TRA Ear Protection Headset
Headphones with electret microphone and manual push-to-talk button for con-
necting to radio equipment.
8.1.1 Application:
Put on the headset, brush your hair away from your ears and position the
earpieces so they are at the centre of your ears. Then adjust the headband so
that it rests comfortably on your head.
Ensure the ear pads are optimally positioned; only by doing this will you obtain
maximum sound suppression.
8.1.2 Adjusting the noise - cancelling microphone
The PTT-E headset is equipped with an NC microphone, which suppresses
unwanted ambient noise and ensures speech is transmitted clearly. A precise
adjustment of the microphone is required in order to achieve optimum noise
suppression. The microphone capsule at the outer end of the goose neck arm
should be located approx. 1.5 cm in front of your mouth.
