Harman Kardon DVD 22 (serv.man2) EMC - CB Certificate ▷ View online
Test report no. JSH0311046-001
Page 5 of 21
3. TEST SPECIFICATIONS
3.1 Standards
EN55020: 2002: Electromagnetic immunity of broadcast receivers and associated equipment.
Basic standard:
EN 61000-4-2(1995+A1 1998): Electrostatic discharge requirements.
Required test level: Contact discharge 4 kV, air discharge 8 kV.
EN 61000-4-4(1995): Electrical fast transient/burst requirements.
Required test level: 1,0 kV AC supply
3.2 Additions, deviations and exclusions from standards
No other additions, deviations or exclusions have been made from standard.
3.3 Purpose of the test
Purpose of test: To determine whether the equipment under test fulfils the EMC-immunity requirements in EN
55020:1999
Test report no. JSH0311046-001
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3.4 Mode of operation during the test
Normal operation
3.5 Performance criteria
The performance criteria are based on the general criteria of the standard and derived from the product
specification
Normal operation
3.5 Performance criteria
The performance criteria are based on the general criteria of the standard and derived from the product
specification
<or>
Criterion A: Continue to operate as intended during the test. No change of actual operating state, for example change
of channel is allowed as a result of the application of the test. Evaluation is carried out for audio and video functions.
Evaluation of audio quality:
Unless otherwise specified in this standard, the criterion of compliance with the requirement is a wanted to unwanted
audio signal ratio of >=40dB at a wanted audio signal level of 50mW.
For AM sound receivers the criterion is >=26dB at 50mW.
The criterion for the audio part of TV receivers is >=40dB.
For AM and FM car radios, the criterion is >=26dB at 500mW.
Evaluation of picture quality
The criterion of compliance with the requirement is just perceptible degradation by observation of the picture, the
screen shall be observed under normal viewing conditions(brightness 15~20 Lux), at a viewing distance of six times
the height of the screen.
In the case of video tape equipment the test criteria relate to the picture, assessed on a test-TV-set, which is connected
to the video output terminal of the equipment.
Criterion B: Continue to operate as intended after the test .No degradation of performance or loss of function. During
the test degradation of performance is allowed, however no change of actual operating state or stored date.
Criterion C: Temporary loss of function is allowed, provided the function is self-recoverable or can be restored by
the operation of the controls.
of channel is allowed as a result of the application of the test. Evaluation is carried out for audio and video functions.
Evaluation of audio quality:
Unless otherwise specified in this standard, the criterion of compliance with the requirement is a wanted to unwanted
audio signal ratio of >=40dB at a wanted audio signal level of 50mW.
For AM sound receivers the criterion is >=26dB at 50mW.
The criterion for the audio part of TV receivers is >=40dB.
For AM and FM car radios, the criterion is >=26dB at 500mW.
Evaluation of picture quality
The criterion of compliance with the requirement is just perceptible degradation by observation of the picture, the
screen shall be observed under normal viewing conditions(brightness 15~20 Lux), at a viewing distance of six times
the height of the screen.
In the case of video tape equipment the test criteria relate to the picture, assessed on a test-TV-set, which is connected
to the video output terminal of the equipment.
Criterion B: Continue to operate as intended after the test .No degradation of performance or loss of function. During
the test degradation of performance is allowed, however no change of actual operating state or stored date.
Criterion C: Temporary loss of function is allowed, provided the function is self-recoverable or can be restored by
the operation of the controls.
For the monitoring equipment see Appendix II.
Test report no. JSH0311046-001
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4. TEST SUMMARY
The results in this report apply only to sample(s) tested:
Test Item
Passed the test
Note
Immunity requirements for the antenna
input connector
input connector
NA
S1
Immunity requirements at loudspeaker and
headphone output connector
headphone output connector
Pass
S2a
Immunity requirements for a.c. mains power
Connectors
Connectors
Pass
S2a
Immunity requirements for the enclosure port
Pass
S3
Measurement of screening effectiveness
Pass
S4
Measurement of electrical transients
Pass
Measurement of electrostatic discharge
Pass
Notes: 1: NA =Not Applicable
Test report no. JSH0311046-001
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5. Immunity requirements for the antenna input connector
5.1 Requirements for input immunity to RF voltages (in differential mode) of the VHF band II part of sound
receivers and of satellite sound receivers
5.1.1 Test result
Pass Fail Not Applicable
5.1.2 Operating environment
Temperature:
°C
Relative Humidity: %
5.1.3 Test set-up
5.1.3 Test set-up
Sound receivers with a VHF band II part shall meet the sound criterion of subclause 6.1.1 of the standard.
They were be tested at a tuned frequency fn and subjected to an unwanted signal of frequency ff and level fn as
specified in Table 3 and 4 of the standard. Receivers with mono/stereo facility was be tested in stereo mode.
specified in Table 3 and 4 of the standard. Receivers with mono/stereo facility was be tested in stereo mode.
5.1.4 Test protocol
Pass
Recorded data for test of input immunity from unwanted signals outside the VHF band II range
Pass
Recorded data for test of input immunity from unwanted signals outside the VHF band II range
Limit
(n
f
[dB(uV)](75
ς) 1KHz AM at 80%
depth
depth
Fn (MHz)
Ff(MHz)
mono stereo
Result
66.2* 80 80
76.9 80
80
87.1 80
80
87.2 80
80
87.25 80 80
87.30 72.4
69.2
87.35 64.8
58.4
87.40 57.2
47.6
87.45 49.6
36.8
87.6
87.50 42.0
26.0
129.3** 80 80
118.6 80 80
108.4 80 80
108.3 80 80
108.25 80 80
108.20 72.4
69.2
108.15 64.8
58.4
108.10 57.2
47.6
108.05 49.6
36.8
107.9
108.00 42.0
26.0
* only applicable for receivers with the local oscillator frequency below the tuned frequency.
** only applicable for receivers with the local oscillator frequency above the tuned frequency.
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