TriPoint VertexRSI 7200, Руководство по эксплуатации и обслуживанию

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7 2 0 0 OPERA TIO N
5 - 1 6
target i s f i xed for durat i on of steptrack operat i ons.
TAB L E 5-3 STE P T R ACK P A R AMETE R S ( c ont i nu e d )
P A R AMETE R DEFAU L T DESC R I P T I ON
Cyc l e to start
rate est i mates
3 Sets the cyc l e at w h i ch rate est i mates w ill be made dur i ng step-
track operat i ons. The rate est i mates are on l y made w hen no OPT
so l ut i on ex i sts for the target be i ng tracked. If an OPT so l ut i on i s
ava il ab l e, the rates used by steptrack are obta i ned from OPT. The
nom i na l va l ue i s 3, but shou l d be decreased to 2 for a very fast
target. For a stat i onary target, the va l ue shou l d be set to 5.
Peak i ng
correct i on li m i t
(%BW)
30 Sets the max i mum beam rad i a l d i stance steptrack w ill ad j ust the
antenna po i nt i ng i n one cyc l e. The va l ue i s g i ven i n percent of -3
dB beam w i dth. Nom i na l va l ue i s 30 % -- th i s can be l o w ered to
10 % to li m i t the steptrack w ork i ng area but w ill i nh i b i t the ab ili ty
of steptrack to peak on a h i gh l y i nc li ned sate lli te.
W e i ght
ad j ustment va l ue
1.00 The steptrack a l gor i thm comb i nes data together by a w e i ght i ng
system w h i ch i s determ i ned automat i ca ll y. Th i s parameter can be
used to magn i fy the i nterna l w e i ght i ng under spec i a l s i tuat i ons.
The nom i na l va l ue i s 1.0 and shou l d not be changed un l ess
d i rected by V ertex personne l . Increas i ng th i s va l ue decreases the
respons i veness of steptrack.
Lo w track i ng
s i gna l l eve l [dB]
-7.00 dB Def i nes the l o w est s i gna l l eve l w i th w h i ch steptrack can w ork to
perform i ts operat i ons. If the s i gna l fa ll s be l o w th i s l eve l w h il e
steptrack i ng, the A CU w ill d i sp l ay a Lo w track i ng s i gna l l eve l
message and w a i t unt il the s i gna l r i ses above th i s l eve l before
attempt i ng another steptrack cyc l e. NOTE: S e tt i ng th i s v a l u e too
c l os e to 0 dB w ill i nt e r f e r e w i th p r op e r st e pt r ack op e r a t i on.
S i gna l thresho l d
[dB]
15.00 dB Wh il e the A CU i s w a i t i ng for the cyc l e t i me to exp i re (to beg i n a
ne w steptrack cyc l e), i f the s i gna l fa ll s by th i s many dB be l o w the
most recent l y acqu i red peak, i t w ill do a steptrack cyc l e
i mmed i ate l y. If the s i gna l thresho l d i s set be l o w the Lo w track i ng
s i gna l l eve l [dB], i t w ill on l y do steptrack cyc l es at i nterva l s g i ven
by Cyc l e t i me.
A x i s to peak f i rst E l evat i on A ll o w s se l ect i on of w h i ch ax i s i s peaked f i rst dur i ng steptrack
cyc l e. Norma ll y, the ax i s for w h i ch the sate lli te has the greatest
apparent mot i on i s peaked f i rst. Se l ect A Z i f the requ i red mot i on
for fo ll o w i ng the sate lli te i s more A Z than EL. Otherw i se, set th i s
parameter to EL.
# of samp l es 30 Sets the number of s i gna l read i ngs taken at each pos i t i on dur i ng
steptrack operat i ons. The va l ue shou l d be bet w een 10 and 150.
Sun outage
protect
i on
Enab l ed Sun outage protect i on w orks by i nh i b i t i ng steptrack w henever the
current l ook ang l es are w i th i n a spec i f i c ang l e from the center of
the sun. The ang l e used i s the 3 Db beam w i dth p l us the rad i us of
the sun’s d i sk. A de l ay of up to 10 m i nutes may resu l t. The A CU
must conta i n the correct s i te and t i me i nformat i on for th i s
parameter to funct i on.