Chapter 7
Using WCDMA/HSPA+ Signal Analyzer
186
JD700B Series User’s Guide
Spectrum emission mask
Spectrum Emission Mask
(On/Off only)
ACLR
ACLR
(On/Off only)
Multi-ACLR
Multi-ACLR
(On/Off only)
Spurious emissions
Spurious Emissions
(On/Off only)
4
Optional
. You can enable alarm sound that goes off if the measurement falls outside of the limit.
Toggle the
Beep
soft key between
On
and
Off
to enable or disable the beep sound.
5
Optional
. Go to
SAVE/LOAD > Save
, and then select
Limit
to save the limit settings.
See “Using save” on page 35 for more information.
Conducting modulation measurements
Constellation
The Constellation is used to observe some aspects of modulation accuracy and can reveal certain fault
mechanisms such as I/Q amplitude imbalance or quadrature imbalance. It displays constellation diagram by
modulation types.
Setting measure setup
After configuring test parameters as described in the “Configuring test parameters” on page 173, you can
continue your measurement. The measurement settings can be saved and recalled as a file.
Procedure
1
Press the
MEASURE SETUP
hot key.
2
To set the scramble code, complete the following steps:
Toggle the
Scramble
soft key between
Auto
and
Manual
.
Enter a value by using the numeric keys to set manually.
Press the
Enter
soft key.
3
Press the
Detect Mode
soft key, and then select the signal standard option:
WCDMA
,
HSDPA
,
or
HSPA+
. HSDPA is set by default.
4
To set the threshold, complete the following steps:
Press the
Threshold
soft key.
Enter a value by using the numeric keys.
Press the
Enter
soft key.