Viavi 3900 Series Operation Manual page 185

6. 4. 5. H S we ep T i me S oft Ke y
Th e Sw e ep T im e s e tting d ef ine s h ow q u ick ly tr ac e d a ta i s a cq uir ed a nd up d ate d to t he
dis pl ay . T his se ttin g m us t b e fa s t en o ug h t o p ro vid e qu ick m e as ure m en t r es ults , b ut slo w
en ou g h t o a llo w t he p ow er va lu es at ea ch p oin t to b e m e as ur ed . Wh en s et t o A U TO , the
Te st Se t o pt im ize s th e Sw e ep T im e. Whe n se t to M AN U A L, a d ef ine d S w e ep Ti me s ett ing
ca n be se le cte d f rom the d rop -d ow n m en u or an ar bitr ary v alu e ca n b e en ter ed b y
se lec tin g t he S we e p T im e da ta fie ld.
Whe n S w ee p Tim e i s s e t to 1 s ec o nd o r lo n ge r, a wh ite p ro gre s s b a r is s ho w n ac ro ss th e
bo tto m of th e g ra ph fie ld wh ile the s we e p is a cc um u lati ng as s ho wn b elo w . T he ye llo w
pr og res s b ar a t the up pe r rig ht co rn er o f the gra p h fie ld is th e a ve ra ge p ro gre s s ind ica to r.
6. 4. 5. I M ark er F ie ld s an d S o ft Key s
Th e S p ec tru m A n aly ze r su pp o rts s ix ve rtic al m a rk ers (M ar ke rs 1 t o 6) a n d tw o h or izo nta l
m ar ke rs (M a rke rs 7 an d 8 ) a s s ho w n in F ig. 6 -3 0. M a rke rs 1 t o 6 c an b e p os itio ne d a t an y
po in t a lon g th e gr ap h's S p an s et ting . M ark er 7 a nd 8 ca n be p o sitio ne d a t a n y po int a lon g
th e g ra ph s v er tica l s ca le.
M ar ke r fun cti on alit y is d es crib ed in th e s ec tio n title d M a rke rs lo ca te d a t t he be gin ni ng o f
th is c ha pt er.
R a di o T e st Ins tru me nt s
F ig . 6 -30 S p ec tru m An a lyz er - A ll M ar ke rs En ab le d
6 - 27