Ann Ounced Type 2 Ce Ll R E-Sele Ction And C All Rest Orat Ion; Ana L Ys Is Of S I Gna Li Ng Me S Sa Ge S; Mo Bil E A Udio Te S T Ing - Aeroflex 3900 Series Option Manual

A n n o u n c ed T y p e 2 C el l R e - se l ec t i o n and C al l R es t o r a t i o n
The proced ure for test ing A nnoun ce d Type 2 C ell Re- selecti on is the sa me as f or Type 3 , t he
diff eren ce being due t o the cap abilit y o f the mobi le under test, Type 2 bein g an opti onal re quire me nt
for TE TR A Mob iles. A Type 2 capabl e mobile per for ms backgro und scan ning o f t he int ended
neighb or ce ll ( other Te st S et) wh ile it is e ngaged in t he call on the se rving cell ( the curr ently used
Test S et) , and has acquir ed the necessar y syn c hroni zation and syste m inf ormat ion fr om t he neighb or
cell ( othe r T est S et) bef ore announ cing C ell Re- s electio n of the ident ified neigh bor cell on the
servin g cell. T he cur rent ly used Test Set indi cates Mob ile R e- Select ed C ell (Type 2) in t his case.
The brea k in t he au dio pa th sho uld b e shor ter fo r a type 2 re- select ion, which can b e obser ved b y
sett ing bo th T est S ets to T est T one.
A n al y si s o f S i g n al i n g M e ss ag es
The Pr otocol Hist ory Til e
includi ng ti me stamp i nfor ma tion. T his inf ormat ion can be used t o check t he con figur atio n of a mobi le
under te st, p art icularl y the values of an y fixed number s fo r cal l set- up o r t he du rati on of timer s . This
info rmatio n i s pr esent ed at a high level cor respon ding to act ions on the mobile an d t he Test S et, so you
do n ot ne ed t o be a TE TR A p roto col expe rt to u nderst and i t. Us e of the Pro tocol featu re is descr ibed
under th e secti on ti tled
A detail ed low -l evel r ecord of the infor m ation tr ansmitte d by t he mob ile un der test can be obta ined b y
using Dat a Display Mode. A fter ini tiati ng a Da ta D ispla y captu re, ret urn to Manual Tiled D isplay Mod e to
perf orm the requi red signaling oper atio ns. When signaling oper atio ns ar e complet e, retu rn t o D ata
Disp lay Mode to st op t he cap ture and view the data wh en r equir ed. Ref er t o sect ion t itled
Mode i n C hapter 2, C ommon TE TR A Ope rati on
M ob i l e A u d i o T es ti n g
Aud io pe rfor mance testi ng al lows for a subject ive t est of t he audio perf orman ce of a mobile and may be
used t o conf irm corr ect op erat ion o f th e aud io compon ents w ith in it . It is also a usef ul aid to fault
diagno sis to audio component s w ithin the mobile.
Aud io per for m ance t esting is achi eved in the Test Se t by st orin g speech recei ved fr om t he mobi le and
sending it ba ck to th e mobi le a fter a 2 s delay (s omet imes r efer red to as Talkba ck or S peech Loopb ack).
I n a dupl ex call , sp eech is cont inuousl y fe d ba ck to th e mobi le's ear piece; soun ds en ter ing the mobile's
microph one sho uld be hear d f rom t he mobi le's ea r pi ece af ter a de lay of 2 s.
In a simplex call, sounds e nter ing t he mobi le's micr ophone wh ile t he P TT is pr essed shou ld be hear d
fr om t he mobile' s spe aker w hen the P TT is r eleased; this is best ach ieved by speaking i nto the mob ile's
microph one br ief ly, t hen immed iately relea sing t he P TT. Th e last 2 s of st ored speech are sent to t he
mobile repe atedly, if the
fr om anot her mobile.
The T est S et can send a T est T one to the mob ile, w hich is useful in ascer tain ing w hethe r a f ault is in t he
audio input or audio out put se ct ion of t he mobi le if the talkb ack test fai ls. The T est S et can al so send
Sile nce to the mobile, usef ul in locat ing t he sour ce of noise in t he a udio syst em.
T E T R A M S S y s t e m
re cords the e vents a nd associa ted paramet ers durin g signa ling o perat ions,
Pr otocol Tiles .
Test Set Tr ansmit Mo de
for info rmati on on vario us TE ST Disp lay Modes.
is C ontin uous, to simul ate a cont inuing tra nsmission
5-65
Da ta Display