R F I Np Ut An D O U Tp Ut Co Nn E Cto; O Ne P Ort D Up Lex - Viavi 3900 Series Operation Manual

3.11.2 . RF I np ut an d Ou tp u t Co nn ect or s
Th e rou tin g o f s ign als w ithi n th e T e st S e t to a n d fr om th e R F in pu t an d ou tpu t c on ne ct ors
is c o ntro lle d f rom the se le cte d Te st Sy ste m . T he re is an L ED a bo ve e ac h co nn ec to r th at
ind ic ate s w h en a co nn e cto r h as b ee n s el ec ted ; th e LE D do e s n ot ind ica te w he n the
co nn e cto r is O N.
G oo d qu alit y, c or rec tly fitte d ca ble s s h ou ld b e us ed to e sta blis h RF o ut pu t co n ne ctio n s.
Wor n c on n ec tor s a nd d am a ge d or kin ke d c a ble s m a y ca us e h ig h le ve ls of refl ec ted
po w er, re su ltin g in m is lea din g res u lts a n d p os sib le da m ag e to the tra n sm itte r.
R e f e r to 39 00 P lat for m Sp e cific at ion s fo r a d d it io n a l i n fo r m a t io n .
3. 11. 2 .A Au di b le a nd V is ua l O ver lo ad Wa rn in g
If th e R F S ig na l a pp lied to th e AN T (A nt en na ) C o nn ec tor ex ce e ds the s afe m a xim u m
lev el , an a ud ible a nd vi su al w a rni ng is t rigg e red . T he o ve rlo ad w arn in g is a lso trig ge re d i f
ex ce ss ive re ve rs e p ow e r is a pp lied to th e G E N (G e ne ra tor ) C on ne ct or. Th e O ve rloa d
War nin g is r es et o n the U se r C a lib rati on Ti le a nd O p era tio na l S ta tus T ile .
CAUTION
WARNING
3.11.3 . On e Po rt D up lex
Th e O ne P ort D up lex a rra ng em e nt us es th e T /R C on n ec tor for R F i np ut an d R F o utp ut .
Th is arr an ge m en t is ty pic all y u se d for tes tin g m o bi le r ad ios u sin g a s ing le dire ct
co nn e ctio n to t he un it u n de r te st.
Th is a rra ng em e nt c an a lso b e u se d fo r o ve r-t he -a ir t es ting w h en o n ly a sin gl e an te nn a is
av ail ab le, or for tes tin g B a se st atio ns th at us e a c om b ine d R x/T x a n ten na s ys tem .
Te st Se t O p er at ion
IF TH E A UD IB L E WAR N IN G T RI GG E R S , R ED U C E PO WE R
IM M ED IA T EL Y . D O N O T P O WE R D OW N T H E TE S T SE T A S TH IS
DO E S N O T R E M O VE T H E O VE R LO A D P O WER F R O M TH E
CO N N E CT IO N .
DO N O T D IS CO N N E CT T H E R F C A BL E F RO M T H E TE S T SE T A S
TH IS M A Y C AU S E BU R N S TO T H E H AN D S .
RF Out = T/R
RF In = T/R
F ig. 3-2 8 O ne P or t D up lex T es t S etu p
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