E1968A Datasheet, PDF (6/22 Pages) Keysight Technologies – GSM/GPRS/EGPRS Test Application

06 | Keysight | E1968A GSM/GPRS/EGPRS Test Application - Technical Overview
Operating Modes
Active cell GSM, GPRS, or EGPRS
A BCH is generated on the downlink. Attach and detach
procedures, voice and packet data transfers on the uplink(s), and
downlink(s) can be executed. TCH and PDTCH band and channel,
GSM timeslot, GSM channel mode, GPRS and EGPRS multislot
configurations, GPRS coding scheme, EGPRS uplink and
downlink modulation coding schemes, and downlink and uplink
power level(s) can be changed. All transmitter measurements can
be made. GSM, GPRS, or EGPRS is used as the serving cell.
Six connection types are available in the active cell operating
modes as follows:
(E)GPRS connection type Test mode A as defined in ETSI 04.14 or 3GPP
ETSI type A
44.014; the downlink is terminated once the
uplink has been established
(E)GPRS connection type Test mode B as defined in ETSI 04.14 or 3GPP
ETSI type B (unack)
44.014 with MS in RLC acknowledged mode;
downlink PDTCH(s) data is generated and the
mobile loops back the downlink data on the
uplink(s); BER and BLER measurements can be
made
(E)GPRS connection type Test mode B as defined in ETSI 04.14 or 3GPP
ETSI type B (ack)
44.014 with MS in RCL acknowledged mode;
downlink PDTCH(s) data is generated and the
mobile loops back the downlink data on the
uplink(s); BER and BLER measurements can be
made
(E)GPRS connection type Keysight-proprietary data connection with the
BLER
primary purpose of calculating BLER
Connection type auto
A GSM voice call or GPRS or EGPRS data
connection can be initiated by the mobile; the
test set can initiate a GSM voice call; if a voice
call is in progress, data transfer requests are
ignored; network-initiated GSM voice call while
a GPRS or EGPRS data transfer is in progress
causes the data connection to be terminated
EGPRS connection type An EGPRS Layer 1 loopback mode for testing
SRB loopback
BER as defined in ETSI 04.14 or 3GPP 44.014
Cell off
All signaling and RF power output is discontinued; this mode is
used mainly for adjusting cell parameters that cannot be changed
when a live cell is operating.
The following six operating modes use limited signaling for call
setup. Protocol is used only to maintain a link established by the
mobile station. Over-the-air signaling and capability to demodu-
late and decode uplink random access channel (RACH) bursts are
not available.
GSM BCH
GSM BCH+TCH
GPRS BCH
GPRS BCH + PDTCH(s)
EGPRS BCH
EGPRS BCH+PDTCH(s)
CW
Fast device tune
A broadcast channel (BCH) without a traffic
channel (TCH) is generated on the downlink
and mobile station level information is carried
on the broadcast control channel (BCCH)
A BCH and TCH are generated on the downlink;
mobile station level information is carried on
the BCCH and the downlink slow associated
control channel (SACCH); timing advance
changes are sent on the downlink SACCH; a
call can be established by manually syn-
chronizing the mobile station with the TCH
and turning on the mobile station’s TCH at
the same absolute radio frequency channel
number (ARFCN) and timeslot as the test set’s
TCH; during a call, demodulation and channel
decoding of the uplink are available, although
no messages are decoded
A BCH is generated on the downlink, but no
uplink demodulation occurs
A BCH and PDTCH(s) are generated on the
down link and the downlink multislot config-
uration can be changed; a forced call can be
established if the mobile is manually syn-
chronized to the test set’s downlink and the
mobile’s uplink PDTCH(s) uses the same ARFCN
and timeslot(s) as the downlink; when a forced
call is established, BER and BLER measure-
ments can be made and demodulation and
channel decoding of the uplink are available,
although no messages are decoded
A BCH is generated on the downlink, but no
uplink demodulation occurs
A BCH and PDTCH(s) are generated on the
down link and the downlink multislot config-
uration can be changed; a forced call can be
established if the mobile is manually syn-
chronized to the test set’s downlink and the
mobile’s uplink PDTCH(s) uses the same ARFCN
and timeslot(s) as the downlink; when a forced
call is established, BER and BLER measure-
ments can be made and demodulation and
channel decoding of the uplink are available,
although no messages are decoded
Under CW mode, an unmodulated continuous
wave (CW) or a FM signal can be generated
on the downlink; the level and frequency of
the CW signal can be changed; for FM signal,
besides the level, frequency, some other FM
related parameters such as FM deviation and
modulation frequency are also settable; no
uplink demodulation or channel decoding is
available with CW mode; in the latest firmware,
reduced single channel GPS source signal can
be generated under CW mode. The power level,
satellite ID and data patterns can be changed
With this special operating mode, a downlink
GSM/GPRS signal sequence based on GSM/
GPRS burst and frame structure can be gener-
ated for mobile phone Rx calibration; simulta-
neously, a measurement uplink test sequence
also can be configured for mobile phone Tx
calibration. Thus, the phone calibration time
will be reduced significantly