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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.
f
Press the DL Symbols soft key to set the number of downlink symbols.
g
Enter a value by using the numeric keys, and then press the Enter soft key.
h
Press the UL Symbols soft key to set the number of uplink symbols.
i
Enter a value by using the numeric keys, and then press the Enter soft key.
3
To set the start/stop symbols, complete the following steps:
a
Press the Start/Stop Symbol soft key.
b
Enter a value by using the numeric keys, and then press the Enter soft key.
4
Toggle the Preamble Index soft key and select the preamble search method: Auto or Manual.
5
Toggle the Search Type soft key and select Full or Window.
6
Optional. Press the Miscellaneous soft key, and then do the following as needed:
–
To select the detect mode, press the Detect Mode soft key and then select the option:
Auto, QPSK, 16 QAM, or 64 QAM.
–
To select the downlink zone, press the DL Zone soft key and then select the permutation
zone option: Auto, PUSC for partial usage of subcarrier channels, FUSC for full usage of
subcarrier channels, or AMC2X3 for adaptive modulation and coding.
NOTE
The permutation zone, which is a number of contiguous OFDMA, symbols in downlink
that use the same permutation. The DL subframe may contain more than one
permutation zone. The maximum number of DL zone is 8 in one DL subframe.
–
To set the delay, complete the following steps:
a
Press the Delay soft key to set the amount of delay in µs.
b
Enter a value by using the numeric keys. You can also use the rotary knob.
c
Press the µs soft key.
NOTE
The Delay setting is used only when there is a time offset in the signals to be measured.
JD700B Series User's Guide
Chapter 13 Using Mobile WiMAX Signal Analyzer
435
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