Seagate ST980210AS Manual de usuario descargar pdf (Pagina 11)

Global Certification Corp.

Date of Issue: SEP.13,2007

Report No:F790506

Page11/16

3. CONDUCTED EMISSION MEASUREMENT

3.1 TEST SET-UP (PLEASE REFER TO APPENDIX 1)

3.2 LIMIT

CLASS A CLASS B

Frequency range

(MHz)

dB(uV)

Average

dB(uV)

Average

dB(uV)

0.15-0.5

79 dBuV 66 dBuV

66 - 56 dBuV 56 - 46 dBuV

0.5-5.0

73 dBuV 60 dBuV

56 dBuV 46 dBuV

5.0-30.0

73 dBuV 60 dBuV

60 dBuV 50 dBuV

Remark: In the above table, the tighter limit applies at the band edges.

3.3 TEST PROCEDURE

The EUT and simulators are connected to the main power through a line impedance

stabilization network (LISN). It provides a 50 ohm / 50 µH coupling impedance for the

measuring equipment. The peripheral devices are also connected to the main power through a

LISN that provides a 50 ohm / 50 µH coupling impedance with 50 ohm termination. (Please

refer to the block diagram of the test setup and photograph.)

Both sides of AC line are checked for the maximum conducted emission interference. In

order to find the maximum emissions, the relating positions of equipment and all of the

interference cables must be changed according to CISPR22 regulation: The measurement

procedure on conducted emission interference.

The resolution bandwidth of the field strength meter is set at 9KHz

LISN LISN

EUT

Load

VCP

HCP

80cm

Non-Conduc

ive Table

Receive

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 23 24

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