Protocol Settings
R&S
®
EX-IQ-BOX
170
User Manual 1409.5570.32 ─ 05
RE Reset
Set or clear the bit on the downlink connection which requests the RE to reset.
Remote command:
7.2.9 Downlink and Uplink
The
Downlink
and the
Uplink
tabs contain the settings for the CPRI basic frame. Down-
link and uplink parameters are similar; they both define the signals I/Q data and its dis-
tribution inside the CPRI basic frame container (AxC allocation).
The CPRI basic frame contains 16 words. The first word, the control word, contains con-
trol information, like synchronization, timing, slow or fast C&M, or vendor specific data.
The remaining words carry the I/Q data.
Terms used in the description and familiar synonyms
UL (Uplink)
: The UL defines the direction from a mobile device to a base station. A
synonym to UL is RL (Reverse Link).
DL (Downlink)
: The DL defines the direction from the base station to the mobile device.
A synonym to DL is FL (Forward Link).
Depending on the CPRI test mode, the R&S
EX-IQ-BOX works either as a transmitter
(Tx) or receiver (Rx), as shown in the following diagrams.
●
In
CPRI RE
test mode, the R&S
EX-IQ-BOX works in the DL (downlink) as a trans-
mitter (Tx) and in the UL (uplink) as a receiver (Rx).
DUT
CPRI RE
EX-IQ-BOX
EXBOX
B85
Downlink
Uplink
RX
TX
Fig. 7-65: CPRI RE test - schematic representation
●
In
CPRI REC
test mode, the R&S
EX-IQ-BOX works in the DL as a receiver (Rx) and
in the UL as a transmitter (Tx).
DUT
CPRI REC
EX-IQ-BOX
EXBOX
B85
Downlink
Uplink
RX
TX
Fig. 7-66: CPRI REC test - schematic representation
CPRI
Summary of Contents for EX-IQ-BOX
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