Chapter 8
Using LTE-FDD Signal Analyzer
JD700B Series User’s Guide
217
Procedure
1
Press the
AMP/SCALE
hard key.
2
Toggle the
Preamp
soft key and select
On
or
Off
as needed.
NOTE
You can turn the Preamp on when the input attenuation range is from 0 dB to 10 dB. If
the attenuation value is manually set to greater than 10 dB, the instrument will
automatically turn off the pre-amplifier to display low-level signal properly on the chart.
External offset
You can turn the
External Offset
on and manually set the external offset value. An offset consists of a cable
loss and a user offset and the measurement result shows the value reflecting both offset values. When the
external offset value is set at 40 dB in the Spectrum mode, the measurement result compensates 40 dB at
both the Spectrum Analyzer and Signal Analyzer modes.
Procedure
To set the external offset:
1
Press the
AMP/SCALE
hard key.
2
Toggle the
External Offset
soft key and select
On
.
3
Enter a value by using the numeric keys.
4
Press the
dB
soft key to complete the entry.
To turn the external offset off:
1
Press the
AMP/SCALE
hard key.
2
Toggle the
External Offset
soft key and select
Off
.
Setting average
You can set the number of measurements to be averaged for the trace presentation. A maximum of 100
times of averaging can be set. When the averaging reaches to your setting, a new measurement value
replaces the measurement value in sequence from the earliest.
Procedure
1
Press the
BW/AVG
hard key.
2
Press the
Average
soft key.
3
Enter a value between 1 and 100 as needed by using the numeric keys.
4
Press the
Enter
soft key.
Setting sweep mode
The default setting is
Continue
to sweep continuously for most on-going measurements. If you want to hold
the measurement or get a single sweep, you can change the sweep mode.
Procedure
To select the single sweep mode:
1
Press the
SWEEP
hot key.
2
Toggle the
Sweep Mode
soft key and select
Single
. You can also use the
HOLD
hot key.
The letter
HOLD
in red appears and the sweeping is paused.
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 ...