Chapter 9
Using LTE-TDD Signal Analyzer
JD700B Series User’s Guide
307
3
Enter the resource block number by using the numeric keys.
4
Press the
Enter
soft key.
The marker appears on the selected resource block.
5
Toggle the
Marker View
soft key between
On
and
Off
to display or dismiss the result of the
selected resource block.
Control channel
The Control Channel measures the constellation for the specified control channel as well as modulation
accuracy of the control channel at the specified subframe.
Setting measure setup
After configuring test parameters as described in the “Configuring test parameters” on page 283, you can
continue your measurement. The measurement settings can be saved and recalled as a file. You can also
use JDViewer, PC application software to configure a measure setup, save as a file, and load the file on to
the instrument.
Procedure
1
Press the
MEASURE SETUP
hot key.
2
To set the nominal channel bandwidth to be measured, complete the following steps:
Press the
Bandwidth
soft key.
Select the bandwidth option from the choices:
1.4 MHz
,
3 MHz
,
5 MHz
,
10 MHz
,
15 MHz
,
and
20 MHz
.
3
To select the subframe number to be measured, complete the following steps:
Press the
Subframe No
soft key.
Enter a value by using the numeric keys. You can also use the rotary knob.
NOTE
For MBMS testing, this subframe number must be neither 0 nor 5 as these subframes 0
and 5 are not available for MBMS and it must be set to the MBMS transmitted channel’s
subframe number.
Press the
Enter
soft key.
4
Optional
. Toggle the
Physical Cell ID
soft key and select
Auto
or
Manual
as desired:
Auto:
Lets the instrument detect the Physical Cell ID for the LTE signal automatically.
Manual:
Sets a specific Physical Cell ID for the LTE signal manually in order to speed up
the synchronization with a BTS.
5
Optional
. Toggle the
CFI
soft key and select
Auto
or
Manual
as desired:
Auto:
Lets the instrument set the number of OFDM symbols used for transmitting PDCCHs
in a subframe.
Manual:
Sets the number of OFDM symbols manually. The set of OFDM symbols that can
be used for PDCCH in a subframe is given by
0
,
2
,
3
or
4
in 1.4 MHz bandwidth and
1
,
2
, or
3
in other bandwidths.
6
Optional
. Press the
PHICH Ng
soft key, and then select the option for the number of PHICH
groups (Ng):
1/6
,
1/2
,
1, 2
,
E-1/6
,
E-1/2
,
E-1
,
or
E-2
.
7
Toggle the
EVM Detection Mode
soft key and select
Single
or
Combine
as desired:
Single:
Testing on one single antenna connected to your JD700B series with a cable.
Combine:
Testing on multiple antennas connected to your JD700B series with a 2x1 or 4x1
combiner or an antenna.
8
Press the
Uplink-Downlink Configuration
soft key, and then select the number of
uplink/downlink between one and six.
9
Optional
. Press the
Miscellaneous
soft key, and then do the following as needed:
To select the number of antenna ports, toggle the
MIMO
soft key and select
2x2
or
4x4
.
Содержание CellAdvisor JD700B Series
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