E1968A Datasheet, PDF (15/22 Pages) Keysight Technologies – GSM/GPRS/EGPRS Test Application

15 | Keysight | E1968A GSM/GPRS/EGPRS Test Application - Technical Overview
Multislot power versus time measurement
All specifications for the multislot power versus time measure-
ment are valid between +20 and +55 °C and using high linearity
ranging mode. GSM/GPRS/EGPRS multislot transmit power mea-
surement or EGPRS multislot-tolerant transmit power measure-
ment accuracy specifications apply to output power results.
Types of signals
measured
Multislot input signal
conditions
Multislot signal mea-
surement capability
Frequency capture
ranges
Minimum input level
Mask placement timing
accuracy
Normal GMSK and 8PSK bursts, RACH bursts
for a single uplink timeslot only
≤ 30 dB difference in power level between
adjacent timeslots. For warranted performance
at Capture All Mode, the maximum difference
between all slots should be ≤ 20 dB
Measurement of a single GMSK or 8PSK uplink
timeslot or five adjacent GMSK and/or 8PSK
uplink timeslots with capture all mode
Signal must be within ± 100 kHz of test set’s
expected frequency for warranted performance
Signal at test set’s RF IN/OUT must have
transmit power ≥ –15 dBm for warranted
performance
< ± 0.1 symbols with midamble synchronization
Accuracy (dBm)
< ± 0.5 dB
< ± 1.0 dB
< ± 2.0 dB
< ± 2.7 dB
< ± 3.0 dB
Frequency (MHz)
–7 to +1 dB for GMSK bursts
–7 to +4 dB for 8PSK bursts
–20 to < –7 dB
–32 to < –20 dB
–50 to < –32 dB, ≥ –46 dBm ¹
–60 to < –50 dB, ≥ –46 dBm ¹
1.  For measurements on any burst in a multislot configuration where the
burst is not the highest, the minimum power is the higher of the following
three cases:
–– –60 dB below reference
–– For capture all mode –60 dB and for capture single mode, –70 dB below
reference plus the offset between this burst power levels and the highest
burst power level
–– –46 dBm
Trigger sources
RF rise, protocol, immediate, auto, external
Trigger delay
Settable between ± 2.31 ms
Burst synchronization
Midamble, RF amplitude, none for a single GSM
or GPRS uplink timeslot; midamble for two
GSM or GPRS uplink timeslots or any EGPRS
uplink timeslots
Tx power method
Estimated carrier power or average burst
power
Ranging mode
High linearity or high dynamic range
Marker measurement
points
12 time points within each burst are definable
PCS ETSI limit
Selection of narrow or relaxed mask in PCS
1900 MHz band
Mask types
Selectable as ETSI, custom 1, custom 2, or no
mask for each burst and ETSI, custom, or no
mask for guard period between bursts
Numerical results
–– For entire single or multislot signal: pass/
fail for rising edge, active part(s), falling
edge, and guard period
–– For each burst: GMSK transmit power or
8PSK burst power, worst case upper mask
limit margin and time, worst case lower
mask limit margin and time, amplitude at
marker measurement points
Displayed graphical
results
–– For single-slot signals: fixed dBc versus μs
views of full, rising edge, falling edge, and
useful part of burst
–– For multislot signals: fixed dBc versus μs
views of both bursts, guard period, burst
1, and burst 2
–– For all signals: ETSI-defined mask, pass/
fail indicators, settable marker, and
variable time and amplitude axes
Multi-measurement
capabilities
1 to 999 bursts; minimum, maximum, average,
and standard deviation results
Concurrency capabilities Multislot power versus time measurements can
be made concurrently with all other measure-
ments
Supplemental characteristics
Typical relative
< ± 0.25 dB over –7 to +1 dB for GMSK bursts
measurement accuracy _{< ± 0.25 dB over –4 to +4 dB for 8PSK bursts}
Typical dynamic range
and typical noise floor
For measurement of the second burst in a
multislot configuration with the first burst
> 10 dB higher than the second burst
–– Typical dynamic range: > lesser of 74 or
84 dB minus power offset between bursts,
or
–– Typical noise floor: < –62 dBm, whichever
dominates
For all other single and multislot signals
–– Typical dynamic
–– > 74 dB, or
range
–– Typical noise floor –– < –62 dBm, whichever dominates
Measurement resolution 0.01 dB