JD780A Series Analyzers
Using Cable and Antenna Analyzer
503
a.
Toggle the
Bias Tee
soft key and select
On
.
b.
Enter a value between 12 and 32 with 0.1 V step.
c.
Enter the
V
soft key.
NOTE
The instrument’s built-in bias tee function (option 002) supplies 12-32 VDC bias to active
devices through the
RF In
port, eliminating the need of an external power supply.
5.
Optional
. To select the output power, toggle the
Output Power
soft key between
0 dBm
and
-30
dBm
.
NOTE
When an amplifier’s reflection is measured, it is recommended that you change this
output power level to -30 dBm and then re-calibrate. Changing to -30 dBm may result in
reduced measurement dynamic range.
6.
Optional
. To turn the interference rejection on, toggle the
Interference Rej
soft key between
On
and
Off
to enable or disable the feature.
NOTE
It is recommended that you use this feature only when you suspect interfering signals in
the area as turning this on slows down the measurement.
Measurement example
Figure 255
Reflection measurement in return loss scale
NOTE
You can use the
LIMIT
hot key to analyze your measurements with the user-definable
limit and Pass/Fail indication. See
“Setting limit for cable and antenna analyzer” on page
516 for more information.
NOTE
You can go to
MEASURE SETUP
> Zoom
to view your measurements in detail with the
user-definable zoom zones. See
“Setting zoom zones” on page 515 for more information.
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...
