Viavi 3900 Series Operation Manual page 172

Radio test set
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6. 3. 3. C
(Fr eq ue nc y) M od e S oft Ke y
Th e M od e S o ft K e y d efi ne s th e C ha nn el An al yze r C e nt er F re qu e nc y in re lat ion to th e R F
An a lyz er Fre q ue nc y. Whe n LO C K M od e is s ele ct ed , ch a ng ing th e Ch a nn el A n aly ze r
C en ter Fr eq ue n cy ch an ge s the R ec ei ve Fr eq ue nc y on th e R F A na lyz er Til e to th e sa m e
va lue . Wh e n U N LO C K E D is s ele ct ed , c ha ng ing th e Ch a nn el A n aly ze r C e nte r F re qu e nc y
up da te s t he tra ce to a po sit ion va lu e r ela tive to th e RF A na lyz e r R ec eiv e Fre q ue nc y.
NOTE
R a di o T e st Ins tru me nt s
Wh e n ch an g ing t he C e nt er F req u en cy , the va lue m u st b e w ith in ±2 .5
M H z of the R F An al yze r F re qu e nc y.
Adjust Center/Start Frequency
F ig. 6- 17 C ha n ne l A na lyz er St art an d Sto p Fr eq ue n cy Se ttin g
6 - 14
Adjust Span

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