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JD780A Series Analyzers
214
Using LTE - FDD Signal Analyzer
–
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.
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 030 LTE-
Advanced FDD 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 030 LTE-Advanced FDD 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, either PMCH or
PDSCH appears on the screen depending on the detected channel.
–
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 select the cyclic prefix, toggle the
Cyclic Prefix
soft key and select
Normal
or
Extended
. See
“Appendix E – Cyclic prefix table” on page 575 for OFDM parameter details
by different bandwidth.
–
Press the
PDSCH Modulation Type
soft key, and then select the modulation type option:
Auto
,
QPSK
,
16 QAM
,
64 QAM
,
E-TM3.3
,
E-TM3.2
,
E-TM3.1
,
E-TM2
,
E-TM1.2
, and
E-
TM1.1
. If two or more modulation types are used in a frame, select
Auto
. If the PDSCH
uses the same modulation type in a frame or in a subframe, select a specific modulation
type to get more accurate EVM.
–
To set the threshold for PDSCH, complete the following steps:
a.
Press the
PDSCH Threshold
soft key.
b.
Enter a value by using the numeric keys.
c.
Press the
dB
soft key.
–
Toggle the
PDSCH Precoding
soft key between
On
and
Off
to enable or disable the
PDSCH precoding.
Содержание CellAdvisor JD780A Series
Страница 52: ...JD780A Series Analyzers 52 Getting Started Figure 6 Example of Web remote on Chrome...
Страница 91: ...JD780A Series Analyzers Using Spectrum Analyzer 91 Figure 23 PIM detection for multiple carriers...
Страница 254: ...JD780A Series Analyzers 254 Using LTE FDD Signal Analyzer 3 RS SINR 4 S SS RSSI 5 P SS Power...
Страница 323: ...JD780A Series Analyzers Using LTE TDD Signal Analyzer 323 3 RS SINR 4 S SS RSSI 5 P SS Power...
Страница 390: ...JD780A Series Analyzers 390 Using EV DO Signal Analyzer 3 Pilot 4 MAC 64 5 MAC 128...
Страница 525: ......
Страница 590: ...JD780A Series Analyzers 590 Appendix Figure 306 Append keywords window...