Anritsu 3GPP, Руководство по измерениям

Страница: 185 / 244

TD-LTE Signal Analyzer 6-11 Setup Menu
3GPP MG PN: 10580-00234 Rev. Y 6-33
Sync Menu
Key Sequence:
Setup > Sync
Trigger Menu
Key Sequence:
Setup > Trigger
Sync Type: Press to choose between the Normal (SS) or RS (Reference
Signal) Sync Type. Only choose RS when there is no sync signal present
in the transmitter under test. If RS is chosen and a sync signal is present,
no modulation measurements will be available.
Cell ID: Identifying information sent by the transmitter in the sync signal. If
Normal (SS) is selected as the Sync Type, the Cell ID is extracted
automatically from the Sync Signal. The Cell ID must be entered manually
when RS Sync Type is selected. For user convenience, the Cell ID is
automatically populated from the last measured signal with an SS.
Select noSS Antenna: Select the antenna (1 through 3) in a 4x4 MIMO
system that does not receive a sync signal. Antenna 0 must receive a sync
signal. This selection is applicable only in RS Sync Type.
Back: Press this submenu key to return to the “Setup Menu” on page 6-32 .
Figure 6-26. TD-LTE Sync Menu
Trigger Source: Press this key to choose between No Trig or External
(Ext). When Ext is chosen, the instrument uses an external trigger input to
determine frame start timing for data acquisition. The internal algorithms
will search for a frame sync and use the delta between the external timing
reference and internal sync to compute a ‘Timing Error’ measurement.
Trigger Polarity: Select the desired edge of the external trigger source to
use for reference.
Back: Press this submenu key to return to the “Setup Menu” on page 6-32 .
Figure 6-27. TD-LTE Sync Menu
Sync
Sync Type
Normal (SS) RS
Cell ID
0
Back
Select noSS Antenna
1
Back
Trigger
Trigger Source
No Trig Ext
Trigger Polarity
Rising Falling