Anritsu Spectrum Master MS2720T, Руководство пользователя

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3-3 EVDO Measurement Setup EVDO Signal Analyzer
3-2 PN: 10580-00235 Rev. D 3GPP2 MG
3-3 EVDO Measurement Setup
The instrument can measure EVDO performance over the air (OTA) with an antenna, or by
connecting the base station directly to the instrument.
To measure an EVDO signal over the air, connect the appropriate frequency band antenna to
the
RF Input
, and connect a GPS antenna to the
GPS
connector.
PN Select Setup
The instrument needs a timing reference in order to determine PN Offset and timing errors.
This reference comes from the base station when it is connected to the instrument, or it can be
recovered from GPS when a GPS antenna is connected.
The setup menu for this function is:
1. Press the
Setup
main menu key.
2. Press the
PN Setup
submenu key to open up the PN Setup menu.
3. Press the
PN Trigger
submenu key to toggle through
No trigger
,
GPS
, or
External
.
4. Press the
PN Search Type
submenu key to toggle between
Auto
or
Manual
. In Auto mode,
the instrument automatically detects the strongest pilot, while in Manual mode it
searches only for the specified PN.
5. Press
Back
to return to the previous menu.
No Trigger: If both GPS and external timing are unavailable, then you may
choose No Trigger for the PN search.
GPS: Uses GPS as the timing reference.
External: The instrument uses an external, even-second time mark as the
timing reference. The time mark is usually available at the base station on a
BNC connector labeled “ESTM” or “PP2S”. ESTM must be connected to the
External Trigger In connector on the instrument.
Figure 3-1. PN Setup
Note
If Manual Search Type is selected, then press Manual PN Offset and enter the
desired PN value.
PN Setup
PN Trigger
No Trig GPS Ext
Back
PN Search Type
Auto Manual
Manual PN Offset
N/A
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