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Types of reports (test suite): Headphones | Headphone amplifiers (internal amp: DAP, sound cards, DACs) | DAC (Line out: DACs, sound cards and DAPs)

Test report IBM ThinkPad X31

Total reports 2 from IBM ThinkPad X31
DAC Line Out | Headphone amplifier


About this report

This is a report for professionals with a suite of tests for line output devices. Alternative version of the report for "dummies" in development.

One product can have multiple reports in different modes and with different a suite of tests.

A suite of tests for the line-out can be used for headphone or speaker output if in this mode it is possible to use the device as a source for connecting an external amplifier or if such a test suite can give more information about the implementation of the DAC in the device.

Test report - general data DAC IBM ThinkPad X31

Frequency response


Graphics setting view
Frequency band, Hz:
Range, dB:
Type test:

Spectrum of Total Harmonic Distortion (THD)

Spectrum of Jitter

Spectrum of Multytone Distortion

General results

General results IBM ThinkPad X31
Channel
Center/Summary
Variation in frequency response in band from 100 Hz to 10 kHz, dB
-0,01, 0,05
Max voltage output at 0 dBFS, VRMS
0,26
Max voltage output at 0 dBFS, dBV
-11,77
Max voltage output at 0 dBFS, dBu
-9,55
Harmonic distortion at 0,0 dBFS @ 1 kHz, dB
-67,5
Total harmonic distortion at 0,0 dBFS @ 1 kHz, %
0,042310
Harmonic distortion at -3,0 dBFS @ 1 kHz, dB
-70,4
Total harmonic distortion at -3,0 dBFS @ 1 kHz, %
0,030304

The table shows the most important technical characteristics IBM ThinkPad X31

*Center channel headphone is received by averaging the frequency response between the left and right channels

Test conditions

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Detailed measurements report of technical characteristics



Report content

Frequency response DAC IBM ThinkPad X31


Graphics setting view
Frequency band, Hz:
Range, dB:
Channel:
Type test:

Frequency response IBM ThinkPad X31
Channel
Left
Right
Variation in frequency response in band from 100 Hz to 10 kHz, dB
-0,01, 0,05
-0,02, 0,05

Translation of the description is not yet ready

Original text in Russian report. You can help with translation via the forum or feedback.

Crosstalk DAC IBM ThinkPad X31


Graphics setting view
Range, dB:
Channel:

Crosstalk IBM ThinkPad X31
Crosstalk at the frequency 100 Hz, dB
-67,4
Crosstalk at the frequency 1000 Hz, dB
-81,7
Crosstalk at the frequency 10000 Hz, dB
-77,3

Translation of the description is not yet ready

Original text in Russian report. You can help with translation via the forum or feedback.


Crosstalk Phase DAC IBM ThinkPad X31


Graphics setting view
Channel:



Noise floor spectrum DAC IBM ThinkPad X31 (High resolution graph)


Graphics setting view
Range, dB:
Channel:
Scale:


Translation of the description is not yet ready

Original text in Russian report. You can help with translation via the forum or feedback.



Spectrum of Total Harmonic Distortion (THD) DAC IBM ThinkPad X31 (High resolution graph)


Graphics setting view
Range, dB:
Channel:
Level, dBFS:
Scale:

Harmonic distortion
IBM_ThinkPad X31
Harmonic distortion at 0,0 dBFS @ 1 kHz, dB
-67,5
Total harmonic distortion at 0,0 dBFS @ 1 kHz, %
0,042310
Harmonic distortion at -3,0 dBFS @ 1 kHz, dB
-70,4
Total harmonic distortion at -3,0 dBFS @ 1 kHz, %
0,030304



Translation of the description is not yet ready

Original text in Russian report. You can help with translation via the forum or feedback.


The levels of harmonics when applying signal 1 kHz 0 dBFS
IBM_ThinkPad X31
Harmonic, number
1
2
3
4
5
6
7
8
9
10
The level of harmonics, dB
0,0
-67,6
-86,2
-103,8
-99,0
-109,6
-104,1
-117,0
-114,2
-137,0
Harmonic, number
11
12
13
14
15
16
17
18
19
20
The level of harmonics, dB
-119,7
-121,5
-121,6
-124,2
-121,9
-124,2
-121,5
-120,8
-83,7
-97,9


The levels of harmonics when applying signal 1 kHz -3 dBFS
IBM_ThinkPad X31
Harmonic, number
1
2
3
4
5
6
7
8
9
10
The level of harmonics, dB
-3,0
-73,7
-92,3
-106,9
-105,3
-111,0
-115,7
-119,2
-119,8
-138,0
Harmonic, number
11
12
13
14
15
16
17
18
19
20
The level of harmonics, dB
-123,2
-123,7
-124,0
-124,3
-123,1
-124,1
-123,9
-123,7
-86,7
-97,9
The data in the tables correspond to by average value of left and right channels

Spectrum of Dynamic Range (-60 dBFS) DAC IBM ThinkPad X31 (High resolution graph)


Graphics setting view
Range, dB:
Channel:
Scale:


Translation of the description is not yet ready

Original text in Russian report. You can help with translation via the forum or feedback.



Sine low ammplitude spectrum -90 dBFS DAC IBM ThinkPad X31 (High resolution graph)


Graphics setting view
Range, dB:
Channel:
Scale:


Translation of the description is not yet ready

Original text in Russian report. You can help with translation via the forum or feedback.



Spectrum of Intermodulation Distortion (IMD) - SMPTE DAC IBM ThinkPad X31 (High resolution graph)


Graphics setting view
Frequency band, Hz:
Range, dB:
Channel:
Level, dBFS:
Scale:


Translation of the description is not yet ready

Original text in Russian report. You can help with translation via the forum or feedback.



Spectrum of Intermodulation Distortion (IMD) - CCIF DAC IBM ThinkPad X31 (High resolution graph)


Graphics setting view
Range, dB:
Channel:
Level, dBFS:


Translation of the description is not yet ready

Original text in Russian report. You can help with translation via the forum or feedback.



Spectrum of Multytone Distortion DAC IBM ThinkPad X31 (High resolution graph)


Graphics setting view
Range, dB:
Channel:
Level, dBFS:
Type test:


Translation of the description is not yet ready

Original text in Russian report. You can help with translation via the forum or feedback.


Spectrum of Noise Distortion DAC IBM ThinkPad X31 (High resolution graph)


Graphics setting view
Range, dB:
Channel:
Level, dBFS:


Translation of the description is not yet ready

Original text in Russian report. You can help with translation via the forum or feedback.



Spectrum of Jitter DAC IBM ThinkPad X31 (High resolution graph)


Graphics setting view
Frequency band, Hz:
Range, dB:
Channel:
Type test:


Translation of the description is not yet ready

Original text in Russian report. You can help with translation via the forum or feedback.


The accuracy of the playback speed IBM ThinkPad X31
Fundamental tone 11025 Hz, Hz
11025,0000
Variance from 11025 Hz, Hz
0,0000



THD vs output voltage of line out IBM ThinkPad X31


Graphics setting view
Channel:
Type test:

THD vs output voltage of line out IBM_ThinkPad X31
Max voltage output at 0 dBFS, VRMS
0,26
Max voltage output at 0 dBFS, dBV
-11,77
Max voltage output at 0 dBFS, dBu
-9,55


Translation of the description is not yet ready

Original text in Russian report. You can help with translation via the forum or feedback.


Total Harmonic Distortion vs Level (dBFS) DAC IBM ThinkPad X31


Graphics setting view
Channel:
Level, dBFS:


Translation of the description is not yet ready

Original text in Russian report. You can help with translation via the forum or feedback.



Total Harmonic Distortion vs Level (dBFS)DAC IBM ThinkPad X31


Graphics setting view
Channel:
Type test:


Translation of the description is not yet ready

Original text in Russian report. You can help with translation via the forum or feedback.



Spectrum of IMD SMPTE vs Level (dBFS) DAC IBM ThinkPad X31


Graphics setting view
Frequency band, Hz:
Channel:
Level, dBFS:


Translation of the description is not yet ready

Original text in Russian report. You can help with translation via the forum or feedback.



Spectrum of IMD CCIF vs Level (dBFS) DAC IBM ThinkPad X31


Graphics setting view
Channel:
Level, dBFS:


Translation of the description is not yet ready

Original text in Russian report. You can help with translation via the forum or feedback.



Spectrum of Multitone Distortion vs Level (dBFS) DAC IBM ThinkPad X31


Graphics setting view
Channel:
Level, dBFS:
Type test:


Translation of the description is not yet ready

Original text in Russian report. You can help with translation via the forum or feedback.



Spectrum of Noise Distortion vs Level (dBFS) DAC IBM ThinkPad X31


Graphics setting view
Channel:
Level, dBFS:


Translation of the description is not yet ready

Original text in Russian report. You can help with translation via the forum or feedback.



Impulse response DAC IBM ThinkPad X31


Graphics setting view
Time, ms:
Channel:


During the test, played a pulse with a sampling frequency of 44.1 kHz and the recording is performed with a sampling frequency of 192 kHz / 24-bit

The impulse response can identify the type of digital filter DAC.

it is a translation from the Russian language. The original text of the report in Russian. Suggest alternative translation possible through the forum, feedback or select text and press Ctrl+Enter (anonymously).



Impulse Response Envelope (ETC - Energy Time Curve) DAC IBM ThinkPad X31


Graphics setting view
Time, ms:
Range, dB:
Channel:


Translation of the description is not yet ready

Original text in Russian report. You can help with translation via the forum or feedback.



Step response DAC IBM ThinkPad X31


Graphics setting view
Time, ms:
Channel:


Translation of the description is not yet ready

Original text in Russian report. You can help with translation via the forum or feedback.



Aliasing DAC IBM ThinkPad X31


Graphics setting view
Channel:
Type test:


Translation of the description is not yet ready

Original text in Russian report. You can help with translation via the forum or feedback.


Checking for correctness of reproduction signals depth more than 16-bit from DAC IBM ThinkPad X31


Graphics setting view
Channel:
Type test:


Translation of the description is not yet ready

Original text in Russian report. You can help with translation via the forum or feedback.






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Total reports 2 from IBM ThinkPad X31
DAC Line Out | Headphone amplifier