Viavi 3900 Series Operation Manual page 165

6. 2. 5. E M kr 1 (o r 2) S ets C F S of t K ey
Se ts th e C e nte r f req ue n cy to the re ad in g a t M a rke r 1 o r M a rke r 2 . T his s oft ke y is
ac ce ss ed b y p re ss ing th e M k r 1 /M kr 2 So ft K e y.
6. 2. 5. F M kr 1 (o r 2) S ets R ef S oft Ke y
Th e M kr to R e f S of t K ey se ts the R ef Le ve l to th e va lue o f M ar ke r 1 or 2 l ev el
m ea su re m en t, w ith n o h ea d roo m o r o ffse t v alu e . Th is so ft k ey is ac ce ss ed b y p re ss ing
th e M k r 1 /M kr 2 S o ft K ey .
6. 2. 5. G M kr 1 (o r 2) to N ext L eft P eak
Th e M a rk er t o N ex t L eft P e ak So ft K e y m ov e s M ar ke r 1 o r 2 to th e ne xt p ea k t o th e le ft o f
th e p re se nt M ark er 1 or 2 p o sitio n. Th is so ft k ey is ac ce ss ed b y p re ss ing th e M kr 1 /M k r 2
So ft Ke y.
6. 2. 5. H M kr 1 (o r 2) to N ext Ri g ht P ea k
Th e M a rk er to Ne xt R ig ht P ea k S o ft Ke y m o ve s M a rke r 1 o r 2 to t he n e xt p ea k to t he righ t
of th e pre se n t M a rke r 1 or 2 po sit ion . T h is so ft k ey is a cc es se d by p re ss ing th e M kr 1 /M kr
2 So ft K e y.
6. 2. 5. I M krs S e t S ta rt-S to p S o ft K ey
Th e M kr to S ta rt/S to p So ft K e y s et s th e left ed ge o f th e trac e to the fre q ue nc y v al ue of
M ar ke r 1 an d the rig ht ed ge o f th e trac e to the fre q ue nc y v alu e of M ark er 2. Th is so ft k ey
is a c ce ss ed by p res sin g the M k r 1 /M kr 2 S o ft K ey .
6. 2. 5. J To g gl e M ar ker S o ft Key
Th e To gg le M ar ke r S oft K ey ch an ge s foc us b etw e en M a rke r 1 a nd M ar ke r 2 w he n b o th
m ar ke rs a re e na ble d. Th e To gg le M ar ke r S oft Ke y als o co ntr ols th e m a rke r r ea din g s
dis pl ay ed a t th e top of th e m in im ize d tile . Ea c h pr es s of th is S of t K e y ch an g es th e s ou rc e
of the m e as ure m e nts th rou g h M k r1 , M kr 2 a nd D el ta r ea do u ts.
Th e To gg le M ark er So ft K e y is on ly a va ila ble on s om e tile s w he n the tile is m in im ize d , as
sh ow n fo r th e C h an n el A n aly ze r in F ig. 6-8 .
R a di o T e st Ins tru me nt s
F ig . 6- 8 To gg le M ark er S oft Ke y
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