E1968A Datasheet, PDF (11/22 Pages) Keysight Technologies – GSM/GPRS/EGPRS Test Application

11 | Keysight | E1968A GSM/GPRS/EGPRS Test Application - Technical Overview
Transmitter measurement specifications
Unless otherwise specified, transmitter measurements can be
performed in active cell (GSM), active cell (GPRS), and active cell
(EGPRS) operating modes.
GMSK multislot-tolerant phase and frequency
error measurement
Types of signals
measured
Normal GSMK bursts from GPRS or EGPRS
signals, RACH bursts for a single uplink
timeslot only
Multislot input signal
conditions
Multislot signal
measurement capability
≤ 30 dB difference in power level between
adjacent timeslots
Measurement of one user-specified timeslot
transmitted as a single timeslot or four adjacent
timeslots
GPRS frequency capture Signal must be within ± 100 kHz of test set’s
range
expected frequency for warranted performance
EGPRS frequency
capture range
Signal must be within ± 1 kHz of test set’s
expected frequency for warranted performance
Minimum input level
Signal at test set’s RF IN/OUT must have
transmit power ≥ –15 dBm for warranted
performance
Frequency error
< ± 12 Hz plus timebase accuracy for normal
measurement accuracy bursts, < ± 18 Hz plus timebase accuracy for
RACH bursts
When using the RF generator as the RF refer-
ence frequency for the mobile, the RF generator
frequency error relative to the timebase refer-
ence must be added
rms phase error
< 1 degree
measurement accuracy
Peak phase error
< 4 degrees
measurement accuracy
Trigger sources
RF rise, protocol, immediate, auto, external
Trigger delay
Settable between ± 2.31 ms
Trigger qualification
On or off
Burst synchronization
Midamble, RF amplitude, none for a single up-
link timeslot; midamble for two uplink timeslots
and all EGPRS signals
GMSK multislot-tolerant phase and frequency
error measurement (continued)
Confidence level
Settable from 80 to 99.99 percent
Peak phase error pass/ Settable between 0 and 20 degrees
fail maximum limit
rms phase error pass/fail Settable between 0 and 5 degrees
maximum limit
Frequency error pass/ Settable between 0 and 0.1 ppm
fail maximum limit
Numerical results
Displayed graphical
results
rms and peak phase error, frequency error,
pass/fail for each result
Peak phase error in degrees versus bits and
demodulated bits with settable marker and
pass/fail limits, variable bit and amplitude axes
Multi-measurement
1 to 999 bursts; maximum, minimum, and
capabilities
average phase and frequency error, and worst-
case frequency error results
Concurrency capabilities GMSK multislot-tolerant phase and frequency
error measurements can be made concurrently
with all other measurements
Supplemental characteristics
Frequency error
0.01 Hz
measurement resolution
Phase error
0.01 degree
measurement resolution
Typical rms phase
error uncertainty versus
transmitter actual error