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

Typical measurement accuracy for GMSK transmit power

at RF IN/OUT port:

Accuracy (dBm)

Frequency (MHz)

Timeslot

< ± 0.10

< ± 0.11

700 to 800

810 to 960

450 to 496

1700 to 1990

Single slot

< ± 0.14

< ± 0.15

700 to 800

810 to 960

450 to 496

1700 to 1990

Multislot at the same

level

< ± 0.29

< ± 0.30

700 to 800

810 to 960

450 to 496

1700 to 1990

Multislot at different

levels

Typical measurement accuracy for 8PSK/16QAM burst

power at RF IN/OUT port:

Accuracy (dBm)

Frequency (MHz)

Timeslot

< ± 0.14

< ± 0.15

700 to 800

810 to 960

450 to 496

1700 to 1990

Single slot

< ± 0.17

< ± 0.17

700 to 800

810 to 960

450 to 496

1700 to 1990

Multislot at the same

level

< ± 0.33

< ± 0.34

700 to 800

810 to 960

450 to 496

1700 to 1990

Multislot at different

levels

Supplemental characteristics

Supplemental

characteristics

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 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 measurement

repeatability

< ±0.05 dB

Measurement resolution 0.01 dB

Measurement accuracy for GMSK transmit power or

8PSK/16QAM burst power at RF IN/OUT port between

+20 and +55 °C:

Accuracy (dBm)

Frequency (MHz)

Timeslot

< ± 0.32

< ± 0.34

700 to 800

810 to 960

450 to 496

1700 to 1990

Single slot and multi-

slot at the same level

< ± 0.57

< ± 0.59

700 to 800

810 to 960

450 to 496

1700 to 1990

Multislot at different

levels

Measurement accuracy for 8PSK/16QAM estimated carri-

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

Accuracy (dBm)

Frequency (MHz)

Timeslot

< ± 0.40

< ± 0.42

700 to 800

810 to 960

450 to 496

1700 to 1990

Single slot and multi-

slot at the same level

< ± 0.65

< ± 0.67

700 to 800

810 to 960

450 to 496

1700 to 1990

Multislot at different

levels

Note: 8PSK estimated carrier power accuracy 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 synchronization

Midamble

Numerical result

GMSK transmit power, 8PSK burst power, 8PSK

estimated 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 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 for GMSK transmit power

or 8PSK burst power at RF IN/OUT port:

Accuracy (dBm)

Frequency (MHz)

Timeslot

< ± 0.15

< ± 0.16

700 to 800

810 to 960

450 to 496

1700 to 1990

Single slot and multi-

slot at the same level

< ± 0.35

< ± 0.36

700 to 800

810 to 960

450 to 496

1700 to 1990

Multislot at different

levels

EGPRS multislot-tolerant transmit power measurement

Types of signals

measured

Normal GMSK and 8PSK/16QAM bursts sent as

EGPRS signals

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 two adjacent

timeslots

Frequency capture range Signal must be within ± 1 kHz of 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/16QAM estimated carrier

power

Typical measurement

repeatability

< ±0.05 dB

Measurement resolution 0.01 dB