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JD780A Series Analyzers
484
Using Mobile WiMAX Signal Analyzer
Measurement example
Figure 241
Preamble scanner measurement with Mobile WiMAX OTA signal analyzer
Multipath profile
The Multipath Profile enables the user to determine RF environmental conditions of testing area. It
indicates the multipath power with time delay in us up to six.
The multipath profile is the result of portions of the original broadcast signal arriving at the receiving
antenna out of phase. This can be caused by the signal being reflected off objects such as buildings,
or being refracted through the atmosphere differently from the main signal.
Setting measure setup
After configuring test parameters as described in the
“Configuring test parameters” on page 456, you
can continue your measurement.
Procedure
1.
Press the
MEASURE SETUP
hot key.
2.
Press the
System Config
soft key, and then do the following:
a.
Press the
Bandwidth
soft key, and then select the nominal channel bandwidth to be
measured from the following choices:
–
7 MHz (8/7):
Sets the channel bandwidth to 7 MHz with sampling factor 8/7. In
conjunction with nominal channel bandwidth
–
8.75 MHz (8/7):
Sets the channel bandwidth to 8.75 MHz with sampling factor 8/7
–
10 MHz (28/25):
Sets the channel bandwidth to 10 MHz with sampling factor 28/25
b.
Toggle the
Frame Length
soft key and select
5 ms
or
10 ms
.
c.
Press the
TTG (RTG)
soft key to set the transmit/receive transition gap between the last
sample of the downlink burst and the first sample of the subsequent uplink burst.
d.
Enter a value by using the numeric keys, and then press the
Enter
soft key.
e.
Press the
CP Ratio
soft key, and then select the cyclic prefix ratio option:
1/4
,
1/8
,
1/16
, or
1/32
.
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...
Page 525: ......
Page 590: ...JD780A Series Analyzers 590 Appendix Figure 306 Append keywords window...