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

(E)GPRS multislot BER measurement

Types of signals

measured

PRBS-15 data sent on GMSK or 8PSK downlink

PDTCH(s) and looped back by the mobile

Minimum input level

For warranted performance, uplink signals at

test set’s RF IN/OUT must have transmit power

≥ –30 dBm and

– ≤ 25 dB difference in power between

levels of adjacent GMSK timeslots sent on

GPRS signals

– ≤ 20 dB difference in power between

levels of adjacent GMSK timeslots sent on

EGPRS signals, or

– ≤ 10 dB difference in power between

levels of adjacent 8PSK timeslots

Residual BER

Connection types

ETSI type B in active cell GPRS or EGPRS

operating mode or SRB loopback in active cell

EGPRS operating mode

Measurement data

patterns

With data connection type ETSI B (unack) and

data looped back by the mobile, selectable

as all zeros, all ones, alternate bits, alternate

pairs, alternate quads, PRBS-9, PRBS-15, fixed

2B (hex), or custom

GPRS block delay

Settable from 1 to 12 blocks or automatically

determined

EGPRS close loop

signaling delay

Settable from 0 to 5 s

EGPRS loopback delay

From 0 to 20

GPRS zero bad blocks

Settable as off or on; when on, all bits within a

bad block are set to zero

Numerical results

Number of bits tested, BER, bit error count,

GPRS block delay, EGPRS loopback delay

Multi-measurement

capabilities

1 to 999,000 bits

Concurrency capabilities (E)GPRS BER measurements cannot be made

concurrently with (E)GPRS BLER measure-

ments, but can be made concurrently with all

other measurements

Supplemental characteristics

Measurement resolution 0.01 percent

(E)GPRS multislot BLER measurement

Types of signals

measured

GMSK data looped back by the mobile using

connection type ETSI type B (unack), 8PSK

data looped back by the mobile using connec-

tion type SRB loopback, or information report-

ed by the mobile in Packet_Uplink_Ack_Nack

messages using connection type ETSI type B

(ack) or BLER

Minimum input level

For warranted performance, uplink signals at

test set’s RF IN/OUT must have transmit power

≥ –30 dBm and

For warranted

performance, uplink

signals at test set’s

RF IN/OUT must have

transmit power

≥ –30 dBm and

≤ 25 dB difference in power between levels of

adjacent GMSK timeslots sent on GPRS signals

≤ 20 dB difference in power between levels

of adjacent GMSK timeslots sent on EGPRS

signals, or

≤ 10 dB difference in power between levels of

adjacent 8PSK timeslots

Connection types

Settable as ETSI type B (unack), ETSI type B

(ack), BLER (for GPRS), or SRB loopback (for

EGPRS)

Measurement data

patterns

With data connection type ETSI B (unack) and

data looped back by the mobile, selectable as

all zeros, all ones, all alternate bits, alternate

pairs, alternate quads, PRBS-9, PRBS-15, or

fixed 2B (hex), or custom

Block delay

Settable between 1 and 6 blocks or automati-

cally determined

Numerical results

Number of blocks tested, BLER, block error

count, BLER of each burst (for connection

type ETSI type B (ack), or BLER), level of each

downlink burst, block delay

Multi-measurement

capabilities

1 to 99,000 blocks

Concurrency capabilities GPRS/EGPRS BLER measurements cannot be

made concurrently with GPRS/EGPRS BER

measurements, but can be made concurrently

with all other measurements

Supplemental characteristics

Measurement resolution 0.01 percent