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2.2.5. PRINTER 

 

2.2.6. MODEM 

 
 
 
 
 
 
 
 

 

 

2.2.7. HEADPHONE 

2.2.8.  USB CABLE: Shielded, Detachable, 1.8m, (Bond one ferrite core) 

 

 

EMC CODE 

: 

ACS-EMC-PT01 

M/N 

: 

2225C 

Manufacturer 

: 

HP 

Data Cable 

: 

Shielded, Detachabled, 1.5m 

Power Cord 

: 

Unshielded, Detachabled, 1.8m 

FCC ID 

: 

BS46XU2225C 

BSMI ID 

: 

N/A 

EMC CODE 

ACS-EMC-MD01 

M/N 

1414 

S/N 

980013578 

Manufacturer 

ACEEX 

Data Cable 

Shielded, Detachabled, 1.5m 

Power  Adaptor 

Unshielded, Detachabled, 1.6 

Adaptor Manufacturer  : 

TGL 

Adaptor  Model No 

MDE130100TH 

FCC ID 

IFAXDM1414 

BSMI ID 

N/A 

EMC CODE 

ACS-EMC-EP01 

M/N 

OV880V 

Manufacturer 

OVANN 

Data Cable 

Shielded, Undetachabled, 4.0m 

 

2.3. Test  Facility 

Site Description 

 

3m Anechoic Chamber 

:  Jun.13, 2006 File on Federal 

Communication Commission 
Registration Number: 90454 

 

 

3m & 10m Anechoic Chamber 

:  Jan.31, 2007 File on Federal 

Communication Commission 
Registration Number: 794232 

 

 

EMC Lab. 

:  Accredited by DATech, German 

Registration Number: DAT-P-091/99-01 
Feb. 02, 2004 

 

 

 

Accredited by NVLAP, USA 
NVLAP Code: 200372-0 
Apr.01, 2006 

2.4. Measurement  Uncertainty 

No. Item 

Uncertainty Remark 

1. 

Uncertainty for Conducted Emission Test 

1.22dB 

 

2. 

Uncertainty for Radiated Emission Test 

3.14dB 

3m Chamber 

3. 

Uncertainty for Radiated Emission Test 

3.18dB 

10m Chamber

4. 

Uncertainty for Power Clamp Test 

1.38dB 

 

 

 

3.1. Test Equipments 

Item Equipment 

Manufacturer 

Model No. Serial No. 

Last Cal. 

Cal. Interval

1.   Test Receiver  Rohde & Schwarz ESHS10 

838693/001 

May 11, 07 1 Year 

2.   L.I.S.N.#1 

Rohde & Schwarz ESH2-Z5 834066/011 

May 11, 07 1 Year 

3.   L.I.S.N.#3 

EMCO 

3825/2 

9006-1660 

May 11, 07 1 Year 

4.  

Terminator 

Hubersuhner 

50

Ω 

No. 1 

May 11, 07 1 Year 

5.   RF Cable 

MIYAZAKI 

5D-2W 

LISN Cable 1# Feb.16, 07  1/2 Year 

6.   Coaxial Switch  Anritsu 

MP59B 

M55367 

Feb.16, 07  1/2 Year 

7.   Pulse Limiter  Rohde & Schwarz ESH3-Z2 100340 

Feb.16, 07  1/2 Year 

3.2.  Block Diagram of Test Setup 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

  (EUT: Computer Speaker System) 

 

3.3. Test  Standard 

EN55022: 1998+A1:2000+A2: 2003 

3.4. Power Line Conducted Emission Limit 

Limits dB(

μV) 

 Frequency 

MHz 

Quasi-peak Level 

Average Level 

0.15  ~ 

0.50 

66 ~ 56* 

56 ~ 46* 

0.50 ~  5.00 

56 

46 

5.00 ~ 30.00 

60 

50 

Notes: 1. *Decreasing linearly with logarithm of frequency. 

  2. The lower limit shall apply at the transition frequencies. 

PC  

AC Mains

 

L.I.S.N. #1 

Test Receiver 

Keyboard 

Mouse 

EUT 

AC Mains 

Printer

L.I.S.N. #3 

a: Audio Cable 
b: USB Cable 
 : Core 

a

Adaptor

Modem

Adaptor

Monitor

Headphone 

b

 

3.5. EUT Configuration on Test 

The following equipments are installed on conducted emission test to meet EN55022 
requirement and operating in a manner which tends to maximize its emission 
characteristics in a normal application. 

3.5.1.  Computer Speaker System (EUT) 

Model Number 

： 

jbl on stage lll 

Serial Number 

： N/A 

Manufacturer(1) 

： 

Zhao Yang Elec. (Shenzhen) Co., Ltd 

Manufacturer(2) 

： 

Jie Hao Elec. (Su Zhou) Co., Ltd 

3.5.2.Support Equipment  ：        As Tested Supporting System Detail, in Section 2.2. 

3.6. Operating Condition of EUT 

3.6.1.Setup the EUT and simulator as shown as Section 3.2. 

3.6.2.Turn on the power of all equipment. 

3.6.3.Let the EUT work in test mode (Data Transmitting) and measure it. 

3.7. Test  Procedure 

The EUT was placed on a non-metallic table, 80cm above the ground plane. The EUT 

Via PC Power connected to the power mains through a line impedance stabilization 
network (L.I.S.N. 1#). The other peripheral devices power cord connected to the power 
mains through a line impedance stabilization network (L.I.S.N.#3). This provided a 
50-ohm coupling impedance for the EUT (Please refer to the block diagram of the test 
setup and photographs). Both sides of power line were checked for maximum conducted 
interference. In order to find the maximum emission, the relative positions of equipments 
and all of the interface cables were changed according to EN 55022 Class B on conducted 
Disturbance test. 
 

The bandwidth of the test receiver (R&S Test Receiver ESHS10) is set at 10kHz. 

 

The frequency range from 150 kHz to 30 MHz is investigated. The test data and the 

scanning waveform are listed in Section 3.8.