JD780A Series Analyzers
126
Using GSM/GPRS/EDGE Signal Analyzer
b.
Select the band to be measured by using the rotary knob, the arrow keys, or the
Page
Up/Page Down
soft keys.
c.
Press the
Select
soft key or the rotary knob to confirm the selection.
4.
Press the
Channel Number
soft key.
5.
Enter a value by using the numeric keys. You can also use the rotary knob.
6.
Press the
Enter
soft key.
The instrument automatically displays the corresponding center frequency value for the selected
channel number.
7.
Optional
. To define the amount of channel increment for the rotary knob, complete the following
steps:
a.
Press the
Channel Step
soft key.
b.
Enter a value by using the numeric keys. You can also use the rotary knob.
c.
Press the
Enter
soft key.
NOTE
This frequency setting is not used in the Spurious Emissions mode.
Setting amplitude
Reference level and attenuation
You can set the reference and attenuation levels automatically or manually to optimize the display of
the traces measured, as you desire.
Procedure
To automatically set the reference and attenuation level:
1.
Press the
AMP/SCALE
hard key.
2.
Press the
Auto Scale
soft key.
Each time you press this key, both of the Y-axis scale and input attenuation level change to be
optimized with some margin.
To set the reference or attenuation level manually:
1.
Press the
AMP/SCALE
hard key.
2.
To set the maximum reference value on the Y-axis manually, complete the following steps:
a.
Press the
Reference Level
soft key.
b.
Enter a value by using the numeric keys or the rotary knob with 10 dB increments.
c.
Press the unit soft key or the
ENTER
hard key.
3.
To set the attenuation option, select one from the following choices:
–
To set the input attenuator
’s level automatically, select
Attenuation > Auto
.
NOTE
It is recommended that you set the
Attenuation
to
Auto
in most situations so that the
level of the input attenuator can be set automatically according to your input signal level.
–
To set the input attenuation manually up to 55 dB to optimize S/N, complete the following
steps:
a.
Select
Attenuation > Manual
.
b.
Press the
Attenuation Value
soft key to set the level.
c.
Enter a value between 0 and 55 in fives by using the numeric keys.
Summary of Contents for CellAdvisor JD780A Series
Page 52: ...JD780A Series Analyzers 52 Getting Started Figure 6 Example of Web remote on Chrome...
Page 254: ...JD780A Series Analyzers 254 Using LTE FDD Signal Analyzer 3 RS SINR 4 S SS RSSI 5 P SS Power...
Page 323: ...JD780A Series Analyzers Using LTE TDD Signal Analyzer 323 3 RS SINR 4 S SS RSSI 5 P SS Power...
Page 390: ...JD780A Series Analyzers 390 Using EV DO Signal Analyzer 3 Pilot 4 MAC 64 5 MAC 128...
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Page 590: ...JD780A Series Analyzers 590 Appendix Figure 306 Append keywords window...
