Viavi 3900 Series Operation Manual page 290

8. 2. 1. D. 17 P eak H ol d S o ft Key
Whe n P e ak H old O N is se lec te d, th e m a xim u m va lue at ea ch fre qu en cy po in t is d isp lay ed
to pro d uc e t he R ED M a x H o ld tra ce . T his tra ce is cle ar ed by s ele ctin g P ea k H o ld O F F .
Pe a k H o ld m u st be re se t (t og gle d O N/ OF F ) w he n Av er ag e rea d ing s a re E na ble d /
D isa ble d. Th e wh ite L ive tra ce is als o dis pla ye d an d ca n b e av era g ed de p en din g on th e
cu rre nt se ttin g. Th is so ft k ey is a cc e sse d by p res sin g the T ra ce So ft Ke y.
8. 2. 1. D. 18 Ave rag e S o ft K ey
Whe n the A ve ra ge S of t K ey is O N , t he tra ce is ca lcu la ted b y a ve ra gin g the n um b er of
m ea su re m en ts d efin e d in th e A ve ra ge s fie ld. T he c al cu late d v alu e is a r ollin g a ve ra ge o r
a on e-s ho t a ve ra ge a s d ef ine d on th e T rig ge r T ile us ing th e Re p ea t S of t K ey an d Sin g le
So ft Ke y. A ye llow p ro gre ss in dic at or i s d isp la ye d in th e up pe r ri gh t co rn er of the g rap h
fie ld w h ile the a ve ra ge re ad in g is a cc um u latin g . T his so ft ke y is a cce s se d b y pre ss in g th e
Tr ac e S o ft K ey .
8. 2. 1. D. 19 S tor e Tr ace S o ft Key
Th e St ore T ra ce So ft Ke ys o pe ns a dia log b ox th at allo w s a u se r to sa ve a ca pt ure d
sig na l tr ac e. Th e sig na l m us t b e in " Ca p ture d " st ate b efo re it c an b e s av e d u sin g the
St ore T rac e f un ctio n . R efe r to the C ap tu re S o ft K ey for info rm a tio n o n c ap tu ring a sig na l
tra ce .
8. 2. 1. D. 20 Rec al l T ra ce S oft Ke y
Th e Re c all T ra ce S oft K ey op en s a d ia log b ox tha t a llo ws th e us er to lo a d s to red tra c e
da ta .
3 90 0 O pti on al Fu n cti on s
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