Viavi 3900 Series Operation Manual page 188

6. 4. 5. R Tr ig g er S o ft Key
Th e Tr igg er So ft K e y a cc e sse s fea tu re s to c on tro l ho w th e t rac e is tr igg er ed .
6. 4. 5. S Rep ea t S o ft Key
Whe n R ep e at So ft K ey is s ele cte d th e tra ce r un s rep e ate dly . Th e R ep ea t an d Si ng le So ft
Ke y s d efi ne th e tr ac e d is pla y a ve ra gin g ca lcu la tion s.
Whe n A ve ra ge S o ft K e y is se t to O N, p re ssi ng R e pe at cle a rs th e las t a ve ra ge d tra c e an d
init iate s a n e w a v era ge d tra ce . T his so ft k e y is ac ce ss ed b y p re ss ing th e Trig g er So ft
Ke y .
6. 4. 5. T S in g le S o ft Key
Th e Sin g le S o ft K e y p lac es th e trac e in S in gle S w ee p M od e. If A ve ra ge S oft Ke y on th e
Tr ac e D is pla y Tile is se t to O N , an d Sin g le is s ele cte d , a sin gle tra ce is ini tiate d w he n t he
trig ge r c on d ition s are m e t. T his so ft ke y is ac ce ss e d b y p re ss ing th e Tri gg er So ft K e y.
R a di o T e st Ins tru me nt s
Fig . 6 -3 2 Sp ec tru m A na lyz er w ith Liv e T ra ce
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