E1968A Datasheet, PDF (16/22 Pages) Keysight Technologies – GSM/GPRS/EGPRS Test Application

16 | Keysight | E1968A GSM/GPRS/EGPRS Test Application - Technical Overview
Burst timing error measurement
Burst timing error measurement result is available on call setup screen.
Types of signals
measured
Normal GMSK or 8PSK bursts, RACH bursts for
a single uplink timeslot only
Measurement capture Signal must be within ± 3 T (bit periods) of test
range
set’s expected position
Minimum input level
Signal at test set’s RF IN/OUT must have
transmit power ≥ –30 dBm and ≤ 20 dB
difference in levels of adjacent timeslots
Numerical result
Burst timing error
Concurrency capabilities Burst timing error measurements can be made
concurrently with all other measurements,
but burst timing result is not available when
PDTCH(s) are not active
Supplemental characteristics
Typical measurement
repeatability
< ± 0.25 T (0.923 μs)
Measurement resolution 0.25 T (0.923 μs)
Multislot-tolerant output RF spectrum (ORFS)
measurement
All specifications for the multislot-tolerant ORFS measurement
are valid between +20 and +55 °C. GSM/GPRS/EGPRS multislot
transmit power measurement or EGPRS multislot-tolerant trans-
mit power measurement accuracy specifications apply to output
power result. These specifications apply to E5515C mainframes
with Option 002 supplied after serial number GB46040001
January 2006, or E5515E.
Modulation measure-
ment implementation
Performed using a five-pole, synchronous-
ly-tuned 30 kHz RBW filter averaged over 40
bits
Switching measurement Performed using a five-pole, synchronous-
implementation
ly-tuned 30 kHz RBW filter with peak hold
during the whole burst
Types of signals
measured
GMSK or 8PSK normal bursts
Multislot input signal
conditions
≤ 30 dB difference in power level between
adjacent timeslots
Multislot signal
Measurement of one user-specified timeslot
measurement capability transmitted as a single timeslot or four adja-
cent timeslots
Frequency capture range Signal must be within ± 200 Hz of test set’s
expected frequency for warranted performance
Minimum input level
Signal at test set’s RF IN/OUT must have
transmit power ≥ –10 dBm for warranted
performance
Filter options
Digital, analog, and auto
Trigger sources
RF rise, protocol, immediate, auto, external
Trigger delay
Settable between ± 2.31 ms
Burst synchronization RF amplitude for GSM or GPRS signals,
midamble for EGPRS signals
Measurement offsets
22 modulation and 8 switching offsets from
carrier are definable
Pass/fail limits
ETSI or user-defined
Numerical results
Modulation and switching results at each
selected offset, output power, transmit power
in 30 kHz bandwidth, modulation and switching
pass/fail indicators, modulation type
Displayed graphical
results
Fixed dB versus frequency views of modulation,
switching, or both modulation and switching,
settable marker and pass/fail limits, modula-
tion and switching pass/fail indicators, variable
frequency and amplitude axes
Multi-measurement
capabilities
1 to 999 measurements; average modulation
result, maximum switching result
Concurrency capabilities Multislot-tolerant ORFS measurements can
be made concurrently with all other measure-
ments
Supplemental characteristics
Modulation dynamic
range
–– –74 dBr digital filter-type for full spectrum,
power 0 dBm or greater
–– –74 dBr analog filter-type for full spec-
trum, power +10 dBm or greater
Typical switching
dynamic range
–70 dBc/–60 dBm (whichever is greater) at
600, 1200, and 1800 kHz offsets, power
+10 dBm or greater