13 | Keysight | E1968A GSM/GPRS/EGPRS Test Application - Technical Overview

GSM/GPRS/EGPRS multislot transmit power

measurement (continued)

Burst synchroni-

zation

RF amplitude (GSM/GPRS midamble-synchronized

transmit power result is available as part of the

multislot power versus time measurement)

Numerical result

GMSK transmit power

Multi-measurement

capabilities

1 to 999 bursts; minimum, maximum, average, and

standard deviation results

Concurrency

capabilities

GSM/GPRS/EGPRS multislot-tolerant transmit

power measurements can be made concurrently

with all other measurements

Supplemental characteristics

Extended amplitude

range

Results are provided for signals at the test set’s RF

IN/OUT port for transmit power within –10 and

+5 dB of expected power

Typical measurement accuracy at RF IN/OUT port:

Accuracy (dBm)

Frequency (MHz)

Timeslot

< ± 0.10

< ± 0.13

< ± 0.14

450 to 496

700 to 800

810 to 960

1700 to 1990

Single slot and multislot

at the same level

< ± 0.32

< ± 0.36

< ± 0.38

450 to 496

700 to 800

810 to 960

1700 to 1990

Multislot at different

levels

Typical measurement accuracy when RF OUT ONLY port

is selected for signal generation (in addition to typical

measurement accuracy at RF IN/OUT port):

Accuracy (dBm)

Frequency (MHz)

< ± 0.01

< ± 0.04

450 to 496

700 to 800

810 to 960

1700 to 1990

Typical measure-

ment repeatability

< ± 0.05 dB

Measurement

resolution

0.01 dB

The following specifications are valid when the burst capture range is set

to All:

Types of signals

measured

Normal GMSK bursts sent as GSM or GPRS signals,

normal GMSK and 8PSK bursts sent as EGPRS sig-

nals, CW, RACH bursts for a single uplink timeslot only

Multislot input

signal conditions

< 30 dB difference in power level between adjacent

timeslots. When autoranging is off, input signal trans-

mit power must be within ± 3 dB for highest burst and

+3 dB/–30 dB for other bursts relative to expected

power of highest burst; when autoranging is on, input

signal transmit power must be within

± 3 dB/–30 dB for all bursts

Multislot signal

measurement

capability

Simultaneous measurement of all bursts up to

6 uplink timeslots in the multislot Class 45

configuration

Frequency capture

range

Signal must be within ± 100 kHz of the test set’s

expected frequency for warranted performance

Minimum input

level

For warranted performance, signal at test set’s RF IN/

OUT must have transmit power > –25 dBm for GMSK

transmit power or 8PSK burst power, and > –20 dBm

for 8PSK estimated carrier power

Measurement accuracy for GMSK transmit power at

RF IN/OUT port between +20 and +55 °C (continued)

Accuracy (dBm)

Frequency (MHz)

Timeslot

< ± 0.32

< ± 0.34

700 to 800

810 to 960

450 to 496

1700 to 1990

Multislot at the same

level

< ± 0.70

< ± 0.72

700 to 800

810 to 960

450 to 496

1700 to 1990

Multislot at different

levels

Measurement accuracy for 8PSK burst power at

RF IN/OUT port between +20 and +55 °C

Accuracy (dBm)

Frequency (MHz)

Timeslot

< ± 0.32

< ± 0.33

700 to 800

810 to 960

450 to 496

1700 to 1990

Single slot

< ± 0.36

< ± 0.37

700 to 800

810 to 960

450 to 496

1700 to 1990

Multislot at the same

level

< ± 0.75

< ± 0.76

700 to 800

810 to 960

450 to 496

1700 to 1990

Multislot at different

levels

Measurement accuracy for 8PSK/16QAM estimated

carrier power at RF IN/OUT port between +20 and +55 °C

Accuracy (dBm)

Frequency (MHz)

Timeslot

< ± 0.42

< ± 0.43

700 to 800

810 to 960

450 to 496

1700 to 1990

Single slot

< ± 0.46

< ± 0.47

700 to 800

810 to 960

450 to 496

1700 to 1990

Multislot at the same

level

< ± 0.85

< ± 0.86

700 to 800

810 to 960

450 to 496

1700 to 1990

Multislot at different

levels

Note: 8PSK estimated carrier power specifications above can be met when signal

quality is not degraded.

Measurement accuracy when RF OUT ONLY port is

selected for signal generation (in addition to measurement

accuracy at RF IN/OUT port)

Accuracy (dBm)

Frequency (MHz)

< ± 0.01

< ± 0.04

450 to 496

700 to 800

810 to 960

1700 to 1990

VSWR at RF IN/OUT < 1.14 : 1 for 450 to 496 MHz and 700 to 960 MHz,

< 1.2 : 1 for 1.7 to 1.99 GHz

Trigger sources

RF rise, protocol, immediate, auto, external

Trigger delay

Settable between ± 2.31 ms

Burst synchroni-

zation

Midamble

Numerical result

GMSK transmit power, 8PSK burst power, 8PSK es-

timated carrier power, 16QAM burst power, 16QAM

estimated carrier power

Multi-measurement

capabilities

1 to 999 bursts; minimum, maximum, average, and

standard deviation results

Concurrency

capabilities

GSM/GPRS/EGPRS multislot transmit power mea-

surements can be made concurrently with all other

measurements

Measurement accuracy for GMSK transmit power at

RF IN/OUT port between +20 and +55 °C

Accuracy (dBm)

Frequency (MHz)

Timeslot

< ± 0.27

< ± 0.29

700 to 800

810 to 960

450 to 496

1700 to 1990

Single slot