Discrete Tone Penalty; Identification Labels; Electromagnetic Compatibility; Ce Mark - Hitachi HTS421212H9AT00 - Travelstar 120 GB Hard Drive Specifications

6.6.2 Discrete tone penalty

Discrete tone penalties are added to the A-weighted sound power (Lw) with the following formula only when
determining compliance.
Lwt(spec) = Lw + 0.1Pt + 0.3 < 4.0 (Bels)
where

6.7 Identification labels

The following labels are affixed to every drive:
• A label which is placed on the top of the head disk assembly containing the statement "Made by Hitachi" or
equivalent, part number, EC number, and FRU number.
• A bar code label which is placed on the disk drive based on user request. The location on the disk drive is to
be designated in the drawing provided by the user.
• Labels containing the vendor's name, disk drive model number, serial number, place of manufacture, and UL/
CSA logos.
• Labels containing jumper information if required by the customer.

6.8 Electromagnetic compatibility

When installed in a suitable enclosure and exercised with a random accessing routine at the maximum data rate, the
drive meets the worldwide EMC requirements listed below:
• United States Federal Communications Commission (FCC) Rules and Regulations (Class B), Part 15
• RFI Japan VCCI, Requirements of Hitachi products
• EU EMC Directive, Technical Requirements and Conformity Assessment Procedures

6.8.1 CE mark

The product is certified for compliance with EC directive 89/336/EEC. The EC marking for the certification
appears on the drive.

6.8.2 C-TICK mark

The drive complies with the Australian EMC standard "Limits and methods of measurement of radio disturbance
characteristics of information technology equipment, AS/NZS 3548:1995 Class B.
Lw = A-weighted sound power level
Pt = Value of desecrate tone penalty = dLt – 6.0(dBA)
dLt = Tone-to-noise ratio taken in accordance with ISO 7779 at each octave band
Travelstar 4K120 Hard Disk Drive Specification
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