TM   11-5820-890-10-1 TRANSMITTER Item  When Equipment  not no. B    A PROCEDURE ready/available if:  (See  Maint) 5     l a.  Set  COMSEC  switch  to b.  Set  RF  PWR  switch  to  LO. c.  Set  MODE  switch  to  SC. d.  Set  FCTN  switch  to Good  is  not shown. e.  Set  FCTN  switch  to 30000 is not SQ ON, and CHAN to MAN. shown. f.  Watch  Sig  display.  Press  handset  push- Sig  display  does to talk. Sig display must be at LO. not light at LO. MOUNTING  ADAPTER  AND  MOUNTING  BASE,  OR  POWER  SUPPLY  ADAPT- ER AND SINGLE RADIO MOUNT (vehicular and vehicular dismount radios) item   When Equipment  not no.     B     A PROCEDURE ready/available if:  (See  Maint) 6     l a.  Make  sure  cables  are  connected  correctly. (See Chap 2, Vehicular Radio Assembly.) b.  Set  MODE  to  SC. c.  Make  sure  audio  device  (handset,  headset, loudspeaker,   intercom)   is   correctly   con- nected   to   mounting   adapter. d. Set FCTN to SQ OFF. Noise is not e.  Note  noise  level  in  audio  device. f.  Set  FCTN  to  SQ  ON. heard. g.  Note  noise  level  in  audio  device.  Level  must   Noise level does be lower than noted in step e. not  decrease. 5-5