Viavi 3900 Series Operation Manual page 248

7. 5. 1. D. 5 Un its
Se le cts th e u n it o f m ea su re fo r th e Le ve l re ad in g. A v aila bl e v alu e is lim it ed b y s ele cte d
au di o in pu t S o urc e . Fo r e xa m p le, the B ala nc e d a ud io inp u t S ou rce c an b e s et to eith er
dB m o r dB r: V is no t a va ilab le as an op tio n. Wh e n V is s ele c ted , a sc alin g v alu e ind ica to r
(m V ) is dis pla y ed be si de th e L ev el rea d ing fie ld on th e G e ne ra tor s T ile .
7. 5. 1. D. 6 S ou rc e
Se le cts th e A u dio in pu t so u rce fo r b as e b an d rec e ive m ea su re m en ts a n d T o ne D ec od ing .
7. 5. 1. D. 7 I nt L oad
Se le cts e ithe r th e 10 k Oh m o r 6 00 O hm i nte rn al l oa d t o b e ap plie d at the A ud io 1 o r
Au d io 2 In pu t. Re m ot e C o m m an ds
7. 5. 1. D. 8 E xter na l L oa d
Th e E xt L o ad to gg le bu tto n en ab le s/d isa bl es th e u se o f a n ex te rna l lo ad . T h e 3 9 00 a llow s
th e us er to de fin e a n ex te rna l loa d v alu e w hi ch is ap plie d a t the Au d io 1 o r Au di o 2 In pu t
po rts . T he e xte rn al lo a d v alu e is a p plie d to A F L ev el d B m or Wat t m ea su re m en ts w he n
th e E xt ern a l Lo ad is en a ble d.
Ex te rna l L oa d is d is ab led w he n Ba la nc ed is se lec te d a s the A ud io Inp u t S ou rce .
7. 5. 1. D. 9 Lo u ds pea ker
Th e Lo ud sp e ak er dro p -do w n m e n u s ele ct s th e so ur ce an d rou tin g o f t he de m od /a ud io
sig na l a pp lie d t o th e lou d sp ea ke r w ith in the T es t S et.
7. 5. 1. E S oft Ke y Defi n iti o ns
7. 5. 1. E . 1 An al yzer S oft Ke y
Th e A n aly ze r S oft K ey se lec ts th e m e th od of s ettin g t he R F inp ut f req ue n cy ( Au to tun e o r
M an ua l). Whe n Au to tun e is s ele c ted th e T e st S e t lo ck s o n to t he st ron g es t sig n al. On ce
th e T es t S e t loc ks o n t o a fre q ue nc y, it m on ito rs the In ba n d/B ro ad b an d P o we r M e te r
de pe n din g on th e s ele ct ed R F Inp ut co nn ec to r.
T/ R Co n ne ct or
Whe n th e T /R C o nn ec to r is se le cte d Au to tun e m on ito rs the In b an d a n d B ro a db an d Po w er
M ete r. If In ba nd P o we r d ro ps be lo w the d B t hre sh o ld d e fine d on th e R F M e as ure m en ts
C on figu ra tio n T ile , a nd B roa d Ba nd P ow e r e xc ee ds 3 dB m , a s ea rch is trig ge re d an d t he
Te st Se t a g ain se a rch es fo r th e stro n ge st sig na l w ith a p o we r le ve l a bo ve th e de fin ed
th res ho ld .
A NT C o nn ec to r
Whe n the A N T Co nn e cto r is se le cte d Au to tun e m on itor s th e In ba nd P ow e r M e ter. If
In ba nd P ow e r d rop s be low th e dB th re sh old d efi ne d o n the R F M ea su re m en ts
C on figu ra tio n Ti le, a s ea rch is tig ge re d an d th e T es t S e t a g ain s ea rc he s fo r the s tro ng e st
sig na l w ith a po w er lev el ab ov e t he de fin ed th re sh old .
7. 5. 1. E . 2 RF I n S oft Ke y
Th e RF In S of t K ey co n trol s th e RF In p ut s ig na l ro utin g . S ele ct eith e r th e T /R C o nn ec tor
or AN T (A n ten na ) C o nn ec to r a s th e R F In p ut p o rt.
7. 5. 1. E . 3 An a Offs et S oft K ey
Ap p lies o r re m ov es a lev el offs et va lue to th e an aly ze r in pu t. With the O ffs et va lue O N
th e in pu t p ow e r le ve l re ad in gs ar e a d jus ted to in clu de th e offs et va lue . T h is v alu e is s et
on th e Of fse ts Co n figu ra tion T ile an d An al yze rs T ile.
A n al og D up le x S y st em
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