LTE Signaling
R&S
®
CMW-KM5xx/-KS5xx
60
User Manual 1173.9628.02 ─ 16
TDD
Band
F
Offset
[MHz]
N
Offset
Channel No N
F [MHz]
43
3600
43590
43590 to 45589
3600 to 3799.9
44
703
45590
45590 to 46589
703 to 802.9
2.2.17 Trigger Signals
The LTE signaling application provides trigger signals that can be used by other
R&S
CMW applications to synchronize to the generated LTE downlink signal.
To address the trigger signals in remote commands, use the following strings, with <i>
replaced by the instance number of the signaling application:
●
"LTE Sig<i>: FrameTrigger"
●
"LTE Sig<i>: PRACH Trigger"
●
"LTE Sig<i>: TPC Trigger"
Frame Trigger
Trigger event at the beginning of each radio frame.
This signal can be used to trigger LTE "Multi Evaluation" measurements (option
R&S CMW-KM500 / -KM550).
PRACH Trigger
Trigger event for each received PRACH preamble. When a preamble has been suc-
cessfully received and detected by the "LTE Signaling" application, a trigger signal is
generated. It is aligned to the beginning of the fourth subframe after the subframe in
which the preamble has started. The following figure illustrates this timing for preamble
format 3.
Fig. 2-20: PRACH trigger timing
The PRACH trigger signal can be used to trigger LTE "PRACH" measurements (option
R&S CMW-KM500 / -KM550). When the measurement receives a trigger event, it eval-
uates already measured data to provide results for the preamble.
TPC Trigger
Trigger event generated when a single TPC pattern is executed ("Single Pattern" or
"User-defined Single Pattern").
This signal can be used to trigger a single shot power measurement using the LTE
"Multi Evaluation" measurement (option R&S CMW-KM500 / -KM550).
General Description
深圳德标仪器
135-1095-0799
