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

range

Signal must be within ± 3 T (bit periods) of test

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

implementation

Performed using a five-pole, synchronous-

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 capability

Measurement of one user-specified timeslot

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