Harman Kardon HK 970 (serv.man14) EMC - CB Certificate ▷ View online
INTERTEK TESTING SERVICES
16 of 19
Applicant: Harman Consumer Group
Report No.: 04173782
Model: HK 970
Test Summary
Pursuant to EN55020: Immunity to RF voltages
(common mode and differential mode)
Port:
Mains (common mode)
Loudspeaker, headphone, and audio I/O terminals
(differential mode)
Loudspeaker, headphone, and audio I/O terminals
(differential mode)
Basic Standard:
EN55020
Required Performance
Criterion:
Criterion:
A
Wanted Signal:
FM: 1kHz, 40kHz deviation FM signal
TV: Standard TV signal (Colour bar with 1kHz
audio)
Audio playback: pre-recorded tape/disc (1kHz
audio)
Video playback: pre-recorded tape/disc (colour bar
with 1kHz audio)
CD, tape, audio amp.: 1kHz audio signal and
colour bar
Video recording: 1kHz audio signal
Unwanted Signal:
AM at 1kHz at 80% depth
Unwanted signal for mains, loudspeaker and headphone terminals
Frequency MHz
Level dBµV (e.m.f.)
0.15 to 30
130
30 to 100
120
100 to 150
120-110(a)
(a) Decreasing linearly with the logarithm of the frequency.
Unwanted signal for audio input/output terminals
Frequency MHz
Level dBµV (e.m.f.)
0.15 to 1.6
80-90(a)
1.6 to 20
90-120(a)
20 to 100
120
100 to 150
120-110(b)
(a) Increasing linearly with the logarithm of the frequency.
(b) Decreasing linearly wit the logarithm of the frequency.
Ctrl. No.: 17.1
INTERTEK TESTING SERVICES
17 of 19
Report No.: 04173782
Test Results
EN55020
Immunity to RF voltages (common mode and differential mode)
Test Mode
Type
Result
(Pursuant to
EN55020, criterion A)
Mains, loudspeaker and headphone
N/A
Radio 98MHz
Audio input/output
N/A
Mains, loudspeaker and headphone
OK
CD In
Audio input/output
OK
Mains, loudspeaker and headphone
OK
Tape In
Audio input/output
OK
Mains, loudspeaker and headphone
OK
Aux In
Audio input/output
OK
Mains, loudspeaker and headphone
OK
TV In
Audio input/output
OK
Mains, loudspeaker and headphone
OK
Tuner In
Audio input/output
OK
Mains, loudspeaker and headphone
OK
CDR In
Audio input/output
OK
Note: Uncertainty:
± 2.5 dB at a level of confidence of 95%
Additional
Information
No observable change
EUT stopped operation and could / could not be reset by operator at
MHz unwanted signal.
EUT was in abnormal operation:
- Operation mode was changed from to at MHz.
The interference level need to decrease for keeping the required S/N ratio
≥40dB.
Ctrl. No.: 17.1
Job no.: 04173782
Ctrl No.: 17.1
Intertek
ETL-SEMKO
ETL-SEMKO
26 November,2004 19:49
0417378R1.dat
<<Immunity (Conducted Voltage) -S2A>>
Standard
: EN 55020:2002
Client
: YANION
Model
: HK970
Product
: STEREO Amplifier
Sample No.
: 1004
Operator
: HL
Remark
: N/A
Remark
: N/A
Measuring Term.: Speaker Rch
Injection Term.: Speaker Rch
Injection Term.: Speaker Rch
Operation Mode : CDR
Reference Level: 0.621 [V]
0.15
150.00
1.00
10.00
0
150
10
20
30
40
50
60
70
80
90
100
110
120
130
140
-110
0
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
Frequency
Lev
el
S/
N
N
[MHz]
[dB(µVe.m.f)]
[dB]
<S2A_AF_MAIN_EN>
Limit
S/N
Start Level
Start Level
Level
INTERTEK TESTING SERVICES
18 of 19
Applicant: Harman Consumer Group
Report No.: 04173782
Model: HK 970
Test Summary
Pursuant to EN55020: RF EM field (AM modulated carrier)
Port:
Enclosure
Basic Standard:
EN55020
Required Performance
Criterion:
Criterion:
A
Wanted Signal:
FM: 1kHz, 40kHz deviation FM signal
TV: Standard TV signal (Colour bar with 1kHz audio)
Audio playback: pre-recorded tape/disc (1kHz audio)
Video playback: pre-recorded tape/disc (colour bar
with 1kHz audio)
CD, tape, audio amp.: 1kHz audio signal and colour
bar
Video recording: 1kHz audio signal
Unwanted Signal:
AM at 1kHz at 80% depth
Unwanted signal for audio or video function
Frequency
MHz
Level
dB(
µV/m)
0,15 to 150
125
Ctrl. No.: 18.1
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