Fdd Test Operating Mode; Ue (Mobile Station) Control During Fdd Test Mode - Agilent Technologies 8960 Series Reference Manual

FDD Test Operating Mode

FDD Test Operating Mode
During frequency division duplex (FDD) test mode operation, call processing operations, such as base station
origination (paging) and location registration, are not available to establish a connection between the test set
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and the UE (mobile station). Instead, when FDD test mode is selected, the test set immediately starts
transmitting a downlink signal containing a dedicated physical channel (DPCH) that is configured as a
12.2 kbps reference measurement channel (RMC). The downlink signal also contains the overhead channels
required to allow the UE to synchronize to the test set and decode transmitted data; the primary common pilot
channel (CPICH), primary common control physical channel (P-CCPCH), and the synchronization channel
(SCH). The paging indicator channel (PICH) is also included, and OCNS and AWGN are available if desired
(see "Noise Sources on the Downlink" ).
To synchronize with the test set's downlink signal, the UE must be manually controlled by the operator to
place it in the correct configuration for it to receive the downlink signal. After the UE has synchronized to the
test set, the UE must be controlled by the operator to begin transmitting a corresponding uplink signal that
also consists of a dedicated physical channel (DPCH) configured as a 12.2 kbps RMC (described in 3GPP TS
25.101, Annex A.2.1, UL Reference Measurement Channel (12.2 kbps).
The test set can perform thermal power, channel power, waveform quality, and adjacent channel leakage ratio
(ACLR) measurements on the uplink signal. Loopback bit error ratio (BER) can be tested if the UE provides a
loopback mode that conforms to 3GPP TS 34.109, section 5.3.2.6.2, Loopback of RLC SDUs. For either the
loopback BER or modulation quality measurements to function, the uplink dedicated physical data channel
(DPDCH) spreading factor must be the minimum allowed for the channel type; which is 64 for the 12.2 kbps
reference measurement channel. Additionally, for the loopback BER measurement, the uplink DPDCH
transport format must be set so both the dedicated traffic channel (DTCH) and dedicated control channel
(DCCH) are present (however, the test set will ignore the contents of the DCCH so the actual content of this
channel is not relevant).
The test set ignores transport format combination indicator (TFCI) and transmit power control (TPC) bits sent
on the uplink.
The following example selects FDD Test operating mode via GPIB:
OUTPUT 714;"CALL:OPERating:MODE FDDT"

UE (Mobile Station) Control During FDD Test Mode

In FDD Test operating mode, the test set does not negotiate with the UE to set up a call, or provide any other
form of interactive control of the UE. User-selected patterns of power control (TPC) or transport format
indication (TFCI) commands can be sent to the UE on the downlink, but the test set does not assume or verify
that the UE responded.
Synchronizing the UE to the Test Set's Downlink to Make Measurements
When the test set and the UE are synchronized, the UE uplink frame starts 1024 chips after the receiving the
corresponding downlink frame. Measurements that require synchronization will not trigger correctly (or at all)
if this timing relationship does not exist. The following test set controls must match your UE configuration to
be able to get it to synchronize to the test set's downlink and transmit an uplink signal that the test set can
1. UE stands for User Equipment, and is the term used in the 3GPP standards. This may be a mobile station (cellular phone) or any
other transceiver device using the W-CDMA protocols.
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