Viavi 3900 Series Operation Manual page 315

8. 3. 7. B Ho w to U se S el ec tiv ity Gen er ato r
Th is ex am p les d es crib e s h ow to u se th e S e lec tiv ity G e ne ra to r T ile t o p er for m a t yp ica l
se ns itiv ity te st. T h is ex am p le ju st o ne of th e w a ys in wh ic h th e S ele cti vity G e ne ra to r c a n
be u se d t o m e as ur e r ec eiv er se lec tiv ity.
ST E P
1. C on fig ure h ard w ar e a s s h ow n in F ig . 8 -33.
2. S ele ct the S IN AD M e te r o n th e M ete rs Ti le ( No ise M e ter s S o ft K ey o n th e
A na lyz ers o r M e ter s T iles ).
3. S et th e Te st S e t's R F G en er ato r Fr eq ue n cy to t he R e ce ive r's o pe ra tin g fre qu en cy .
4. In cre as e the T es t S et' s R F G en er ato r L ev el un til th e m ea su rin g d e vic e d isp la ys
th e re fe re nc e s en sit ivity (ty pi ca lly + 1 2 d B SI NA D ).
5. P res s t he S et C e nt er Fre q or Ce n ter Bu tto n on th e S e lec tivi ty G e ne ra tor Ti le.
6. In cre as e the R F Ge n era to r L ev el by +6 d B.
7. In cre as e the R F Ge n era to r F re qu en cy un til the mea s urin g de vic e dis pla ys th e
re fer en ce se ns itiv ity (typ ic ally + 12 dB S IN A D) .
8. P res s t he S et H ig h Fre q or H igh B utt on on th e Se le ctiv ity Ge n era to r T ile.
9. D ec rea se th e RF G e ne ra tor Fr eq ue nc y un til th e m ea su rin g d ev ice d isp la ys the
re fer en ce se ns itiv ity (typ ic ally + 12 dB S IN A D) .
10 . P res s t he S et L o w Fre q or Lo w B utto n on th e S e lec tiv ity G e ne ra to r T ile.
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3 90 0 O pti on al Fu n cti on s
P ROC EDU RE
50 Ohm
F ig . 8 -33 S e lec tivit y G e ne ra tor Te st Se tu p D ia gr am
8 - 31
Receiver
(UUT)
ANT In
Rx Spkr Out