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

GSM analog audio distortion measurement

Types of signals

measured

Sinusoidal audio signals

Measurement frequency

range

100 Hz to 10 kHz

AUDIO IN level range

42.4 mV to 20 V peak (30 mV to 14.1 V rms)

Measurement accuracy

< ± 12 percent of reading (± 1.0 dB) for

distortion > 0.67 percent

Residual THD plus noise < –60 dB or 200 μV rms, whichever is greater

Measurement trigger

source

Immediate

Measurement

synchronization

None required

Numerical result

Audio distortion

Multi-measurement

capabilities

1 to 999 measurements; average, minimum,

maximum, and standard deviation results

Concurrency capabilities GSM analog audio distortion measurements

cannot be made concurrently with GSM multi-

tone audio, but can be made concurrently with

all other measurements

Supplemental characteristics

Measurement resolution 0.1 percent

GSM analog audio SINAD measurement

Types of signals

measured

Sinusoidal audio signals

Measurement frequency

range

100 Hz to 10 kHz

AUDIO IN level range

42.4 mV to 20 V peak (30 mV to 14.1 V rms)

Measurement accuracy

< ± 1.0 dB for SINAD < 43.5 dB

Residual THD plus noise < –60 dB or 200 μV rms, whichever is greater

Measurement trigger

source

Immediate

Measurement

synchronization

None required

Numerical result

SINAD ratio

Multi-measurement

capabilities

1 to 999 measurements; average, minimum,

maximum, and standard deviation results

Concurrency

capabilities

GSM analog audio SINAD measurements

cannot be made concurrently with GSM multi-

tone audio, but can be made concurrently with

all other measurements

Supplemental characteristics

Measurement resolution 0.1 dB

GSM analog audio frequency measurement

Types of signals

measured

Sinusoidal audio signals

Measurement frequency

range

100 Hz to 15 kHz

AUDIO IN level range

7.1 mV to 20 V peak (5 mV to 14.1 V rms)

AUDIO IN signal

conditions

Signal at test set’s AUDIO IN must have signal-

to-noise ratio > 30 dB for warranted perfor-

mance

Measurement accuracy

< 0.1 Hz averaged over 10 measurements,

< 1.0 Hz for a single measurement

Measurement THD plus

noise

< 200 μV rms

Measurement trigger

source

Immediate

Measurement

synchronization

None required

Numerical result

Audio frequency

Multi-measurement

capabilities

1 to 999 measurements; average, minimum,

maximum, and standard deviation results

Concurrency capabilities GSM analog audio frequency measurements

cannot be made concurrently with GSM multi-

tone audio, but can be made concurrently with

all other measurements

Supplemental characteristics

Measurement resolution 0.1 Hz