Viavi 3900 Series Operation Manual page 251

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7. 5. 1. E . 9
Hu m & Noi se Ref Lo ck S o ft Key
Se ts a ref ere nc e loc k t o th e cu rre nt H um & N oi se M ete r r ea din g . Th is so ft k ey is on ly
av ail ab le w h en H um & N o ise S N R is s ele ct ed on th e SN R M e ter or AF M e ter S oft Ke y.
7. 5. 1. E . 10
Ge n F req = An a Fr eq + Dx O ffset S o ft K ey
Th e G en F req = A na Fr eq + D x O ffs et S oft Ke y se ts t he R F G e ne ra to r fre qu e nc y to a
va lue s pa ce d fro m the R F An a lyz er freq u en cy as s et i n th e Dx O ffs et fiel d o n the
G en er ato rs Til e.
7. 5. 1. E . 11
I NC/ DE C S o ft K ey
O pe ns a so ft k ey su b -m en u tha t in cr em e nts o r d ec rem e nt a sp ec ific se ttin g.
7. 5. 1. E . 12
I NC Ge n F req / DE C Ge n F req S oft Ke y
Ea c h pr es s o f the so ft ke y c au se s th e R F G e ne ra tor f req ue n cy t o in cre m en t or d e cre m en t
by th e v al ue se t in th e F re q Inc fie ld on th e G e ne ra tor s T ile .
7. 5. 1. E . 13
I NC Ge n L eve l/ DE C G en L ev el S oft Ke y
Ea c h p re ss of the s oft ke y c au se s the R F G en era to r le ve l to in cre m en t o r d ec re m en t b y
th e v alu e se t in th e L ev el Inc fie ld on th e G e ne ra to rs T ile .
7. 5. 1. E . 14
I NC An a Fr eq /D EC A na F re q S o ft Key
Ea c h p re ss of the s oft ke y c au se s the R F An a lyz er f req u en cy to inc re m en t o r d ec rem e nt
by th e v al ue se t in th e F re q Inc (A n aly ze r) fi eld on th e An a lyz ers T ile.
7. 5. 1. E . 15
Retu rn S oft Ke y
R etu rn s to th e top le ve l so ft ke y fu n ctio ns fo r th e RF G e ne ra tor s T ile.
A n al og D up le x S y st em
7 - 41

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