Lo W Er Lim; O Ffse - Viavi 3900 Series Operation Manual

3.9.2. Lo wer Li mit
Whe n a m e a su red le ve l d rop s be low t he en a ble d L O WE R LIM I T, t he M et er Ba r a nd
re ad ing b ac kg ro un d o f th e M ea su re m en t T iles tu rn s B L UE .
Whe n re ad ing s are w ith in e n ab led U pp e r a nd Lo w er lim its, th e M e te r B ar an d r ea din g
ba ck gr ou nd o n t he M ea su re m en t T ile s tu rn s G R E EN .
A Lo w er Lim it va lue m us t b e les s th a n th e va lue d efi ne d i n th e Up p er Lim it field , e ve n if
th e U p pe r L im it is no t e na b led .
Fo r e xa m pl e, i f th e T /R In ba nd P o we r U p pe r a nd L ow e r Li mi t va lu es on th e RF L im its
C on figu ra tio n T ile a re bo th 0 .0 dB m (d efa u lt va lue s) , to s et T /R In ba nd P ow er Lo we r L im it
va lue to 5 .0 dB m :
ST E P
1. S et T /R In ba n d U p pe r L im it V al ue to a v a lue gr ea te r th an 5 .0 d B m , fo r th is
ex am p le us e 1 0 .0 dB m .
2. S et T /R In ba n d L ow e r L im it V al ue to 5.0 d Bm .
3 .1 0 O FF SET S
39 00 Te st S ys tem s c on ta in va rio us O ffs et s tha t allo w th e us e r to c o mp e ns ate f or th e us e
of ex ter na l e qu ipm e nt su ch a s a n atte n ua tor . Wh en a n O ffs e t is en ab led , a n ind ica to r is
dis pl ay ed ne xt to the c orr es po nd in g f ield o n v ar iou s t es t tile s.
Te st Se t O p er at ion
T hi s s ym b ol i nd ica tes w he n an o ffse t is e na ble d for a pa rtic ula r p ar am e ter .
Fig . 3 -2 6 G e ne ra to r an d A na lyz er O ffse t In d ica tor s
P ROC EDU RE
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