E1999A Datasheet, PDF (3/6 Pages) Keysight Technologies – E1999A-202 Enhanced Fast Device Tune

GSM/GPRS/EGPRS Fast
Device Tune
For GSM/GPRS/EGPRS, Fast Device Tune
is based on GSM burst and frame
structure.
For RX calibration, 6 timeslots can be used
within a frame. These timeslots can be set
to 4 different power levels. For receiver
testing, the first several frames are used
for synchronization (FCH for Frequency
Synchronization, SCH for Time
Synchronization), and subsequent
timeslots are used to send different levels
to the device. Each GSM frame can be
retuned to a new frequency, and once the
frequency and power profile are complete,
it can be redone at a new band. For TX
calibration, you can configure the mobile
station to send up to 7 uplink bursts in one
TDMA frame. The TXP measurement is
able to simultaneously measure the 7
uplink bursts with a single capture on a
TDMA frame. Both GMSK (GSM/GPRS)
and 8PSK (EGPRS) signals can be
measured.
GSM/GPRS/EGPRS Fast Device Tune uses
test sequences, DTS (downlink Test
Sequence) and UTS (uplink Test Sequence)
to implement phone calibration. A DTS is
comprised of a series of Downlink
Sequence Steps (DSS) where each
sequence step corresponds to one or more
downlink TDMA frames. Many parameters,
such as Frequency, number of active
bursts, burst power level, burst type and
repeat count number can be set to
configure the DTS. The maximum number
of steps per DTS is 50. The repeat count
for any DSS can be up to 1000 times.
Similarly, An UTS is comprised of a series
of Uplink Sequence Steps (USS). Each
sequence step corresponds to a
measurement make over a number of
TDMA frames. The mobile station must
output the correct number of TDMA
frames for each USS. The maximum
number of active bursts in Fast Device
Tune operating mode allowed per uplink
TDMA frame is 7. The maximum number of
steps per UTS is 50.
GSM/GPRS/EGPRS Fast Device Tune
requires a chipset that can generate the
expected waveform, and a test mode by
the manufacturer to control the chipset as
well as the 8960.
Figure 2: GSM/GPRS/EGPRS Fast Device Tune
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