JD780A Series Analyzers
290
Using LTE
– TDD Signal Analyzer
Procedure
1.
Press the
MEASURE SETUP
hot key.
2.
To set the nominal channel bandwidth to be measured, complete the following steps:
a.
Press the
Bandwidth
soft key.
b.
Select the bandwidth option:
1.4 MHz
,
3 MHz
,
5 MHz
,
10 MHz
,
15 MHz
, or
20 MHz
.
3.
To select the subframe number to be measured, complete the following steps:
a.
Press the
Subframe No
soft key.
b.
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.
c.
Press the
Enter
soft key.
4.
Optional
. Toggle the
Cell ID
soft key and select
Auto
or
Manual
as desired:
–
Auto
: to let the instrument detect the Cell ID for the LTE signal automatically.
–
Manual
: to set a specific 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
: to let the instrument set the number of OFDM symbols used for transmitting PDCCHs
in a subframe.
–
Manual
: to set 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 JD780A series with a cable.
–
Combine:
Testing on multiple antennas connected to your JD780A 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(s) as needed:
–
To select the number of antenna ports, toggle the
MIMO
soft key and select
2x2
or
4x4
.
This MIMO (Multiple Input Multiple Output) setting is activated only if the option 031 LTE-
Advanced TDD is installed with a license number. If not, the instrument sets this option to
2x2 by default. A 2x1 or 4x1 RF combiner is also required to able to test on MIMO
channels.
–
To assign a antenna port number automatically or manually, press the
Antenna Port
soft
key and select the option:
Auto
,
0
,
1
,
2
, and
3
. If the option 031 LTE-Advanced TDD is not
installed or if the MIMO is set to 2x2, the antenna ports 2 and 3 are disabled.
–
To turn the Multimedia Broadcast Multicast Service (MBMS) feature on or off, toggle the
MBMS
soft key and select
On
or
Off
. For proper MBMS testing, you need to set the
Subframe No
with the same PMCH subframe number. If this setting is on, the
measurement item
“MBSFN RS” appears in the result table.
–
To set the Multicast Broadcast Single Frequency Network (MBSFN) detection automatically
or manually for MBMS testing, toggle the
MBSFN
soft key and select
Auto
or
Manual
. An
automatically detected or manually entered MBSFN ID appears on the screen.
–
To set the delay, complete the following steps:
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...
