User`s guide

Agilent PXT Wireless Communications Test Set
User’s Guide
208
2. Set the trigger delay = 2 ms by pressing Func Setup > Trigger> Internal Trigger > Trigger Delay,
2, ms.
Measurement Setup
The frequency span of the measurement is fixed for a given system bandwidth.
Access the Carrier Setup menu, by selecting the Meas Setup front-panel key.
One or two carriers can be specified using the Number of Carriers setting. If two carriers are specified,
either one can be selected as the Reference Carrier for the measurement. The carriers are specified in
terms of a Carrier Spacing from the center frequency and an Integration Bandwidth. These parameters
can be set for both carriers by first setting Select Carrier to the index of the carrier to be modified.
Access the Offset Setup menu by selecting the Meas Setup front-panel key.
Up to five offset pairs can be enabled using the Number of Offsets setting. Offset pairs are located
symmetrically about the center frequency. An offset pair must be selected using the Select Offset setting
in order to modify it. The offsets are specified in terms of an Offset Spacing from the center frequency and
an Integration Bandwidth. Limit testing is specified separately for each offset pair using the Fail Source
setting. The limit testing may be Absolute (where the absolute power in the integration BW for the offset
is compared to an absolute limit value), Relative (where the power ratio of Offset Power to Channel Power
is compared to a relative limit value) or None. Repeated key presses of the Fail Source menu key cycles
through the limit testing options. Absolute Limit and Relative Limit values may be set for each offset pair.
Making Measurements Requiring Demodulation
The general settings described above together with the settings described below are required for making
measurements requiring demodulation. The following description assumes that the frequency, reference
level, and system bandwidth have been correctly set. It also assumes that the trigger source is Internal
and that the trigger delay is 0ms.
Auto Config
Key Path: Mode > SA > LTE > Mode Setup
This setting enables you to make UE uplink measurements easily when a call is in progress. The
measurement settings shown below are automatically configured, without having to select them manually.
There are some important functional details that must be kept in mind when using this feature:
• When SA:LTE:AUToconfig = On
all the parameters listed in the tables below are populated
based on the setting of those parameters in BSE Mode.
- This setting is only available when you are making measurements on a call.
- Parameter settings are not configurable by remote command when
SA:LTE:AUToconfig = On.
• When SA:LTE:AUToconfig = Off
all the parameters can be overwritten to different values if
desired.
- This setting is used, for example, in a non-call processing test mode setup up in
which you know the parameters of the UL transmission and wish to capture the
expected signal.
• The default setting for SA:LTE:AUToconfig is On
.