Chapter 6
Using GSM/GPRS/EDGE Signal Analyzer
JD700B Series User’s Guide
159
6
Set the lower threshold:
Press the
Low Limit
soft key.
Enter a value for the lower limit.
Press the
dBm
unit soft key.
7
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.
8
Optional
. Go to
SAVE/LOAD > Save
, and then select
Limit
to save the limit settings.
See “Using save” on page 35 for more information.
Measurement example
Figure 77 Power vs. time (frame) measurement with GSM signal analyzer
Conducting constellation measurements
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 145, 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
Press the
Time Slot
soft key to assign a time slot with which performs measurements, and then
select your desired time slot number from
0
to
7
.
3
Press the
Detect Mode
soft key, and then select the signal standard option:
Auto
,
GSM
, or
EDGE
.
Auto is set by default. The instrument applies a mask automatically based on the selected mode.
4
Toggle the
PSK Constellation
soft key between
On
and
Off
to enable or disable the PSK
constellation observation.
Содержание CellAdvisor JD700B Series
Страница 2: ...CellAdvisorTM JD700B Series FW3 120 User s Guide ...
Страница 105: ...Chapter 4 Using Spectrum Analyzer 104 JD700B Series User s Guide Figure 44 PIM detection for multiple carriers ...
Страница 406: ...Chapter 11 Using EV DO Signal Analyzer JD700B Series User s Guide 405 3 Pilot 4 MAC 64 5 MAC 128 ...
Страница 734: ...Chapter 18 Perfroming BBU Emulation JD700B Series User s Guide 733 Figure 441 Example of verification of link status ...
Страница 763: ...Chapter 21 Performing Fiber Inspection 762 JD700B Series User s Guide Figure 461 Fiber inspection report ...
Страница 808: ...Appendix JD700B Series User s Guide 807 JD740B series ...
Страница 811: ...Appendix 810 JD700B Series User s Guide Figure 470 Append keywords window ...