4. Sa fe ty in struc tions
The fol lo wing in struc tions must be fol lo wed for safe ope ra ti on of the VHF trans cei -
ver:
A. Switch off the unit when star ting or shut ting down en gi nes.
B. A speech test is to be per for med be fo re start up and it should be no ted that if
the speech test is car ried out clo se to the ground sta ti on the re sults may be
po si ti ve even if the an ten na ca ble is bro ken or short-circuited. At a dis tan ce
of 5 to 10 km no con nec ti on will be made.
C. Use a loud voi ce for speech com mu ni ca ti on and hold the mi cro pho ne clo se to
the lips. Ot her wi se ca bin noi se can be in tru si ve and make un der stan ding dif fi-
cult.
D. Use only mi cro pho nes or he ad sets which are suit ab le for use in air craft. In air-
craft made of wood or syn the tic ma te ri als or in gli ders or he li cop ters, in co ming
ra di ati on on the equip ment an ten na can af fect the in te gra ted am pli fier of the
mi cro pho ne (feed back). This is no ti ce ab le in the ground sta ti on by whist ling
and/or he avy dis tor ti on. The des cri bed dis tur ban ces can oc cur in dif fe rent ways
on the dif fe rent trans mis si on chan nels.
E. Trans mit but tons can stick and cau se con ti nu ous trans mis si on. The re fo re, when
trans mit ting en su re that the ar row in the top line on the left next to the ac ti ve
fre quen cy dis play dis ap pe ars when the trans mis si on but ton is re lea sed.
IN STAL LA TI ON AND OPE RA TI ON
AR 4201 - ( )
Page 3-19
23-10-01 De cem ber 15/98
To Next Page
Loading...
