Sony md walkman mz-r55 Benutzerhandbuch

Audio playing system
MiniDisc digital audio system
Laser diode properties
Material: GaAlAs
Wavelength: 

λ

 = 780 nm

Emission duration: continuous
Laser output: less than 44.6 µW
(This output is the value measured at a
distance of  200 mm from the lens surface on
the optical pick-up block with 7 mm
aperture.)
Recording and playback time
Maximum 74 minutes (MDW-74, stereo
recording)
Maximum 148 minutes (MDW-74, monaural
recording)
Revolutions
400 rpm to 900 rpm (CLV)
Error correction
Advanced Cross Interleave Reed Solomon
Code (ACIRC)
Sampling frequency
44.1 kHz
Sampling rate converter
Input: 32 kHz/44.1 kHz/48 kHz
Coding
Adaptive TRansform Acoustic Coding
(ATRAC)
Modulation system
EFM (Eight to Fourteen Modulation)
Number of channels
2 stereo channels
1 monaural channel
Frequency response
20 to 20,000 Hz ± 3 dB
Wow and Flutter
Below measurable limit
Inputs
Microphone: stereo mini-jack, 0.22–0.78 mV
Line in: stereo mini-jack, 69–194 mV
Optical (Digital) in: optical (digital) mini-jack
Outputs
Headphones: stereo mini-jack, maximum
output level 5 mW+ 5 mW, load impedance
16 ohm
Line out: stereo mini-jack, 194 mV, load
impedance 10 kilohm

Power requirements
Sony AC Power Adaptor (supplied)
connected at the DC IN 3 V jack:

120 V AC, 60 Hz (US model)
230–240 V AC, 50/60 Hz (UK and Hong
Kong model)
240 V AC, 50/60 Hz (Australia and New
Zealand model)

Nickel metal hydride rechargeable battery
NH-14WM (supplied)
Two LR6 (size AA) alkaline batteries (not
supplied)
Battery operation time
See “Battery life” (page 28)
Dimensions
Approx. 78.9 x 18.9 x 84 mm (w/h/d)
(3 

1

/

8

 x  

3

/

4

  x 3 

3

/

8

 in.)

Mass
Approx. 147 g (5.2 oz) the recorder only
Approx. 190 g (6.7 oz) incl. a recordable MD,
and NH-14WM nickel metal hydride
rechargeable battery
Supplied accessories
AC power adaptor (1)
Headphones with a remote control (1)
NH-14WM nickel metal hydride
rechargeable battery (1)
Rechargeable battery carrying case (1)
Dry battery case (1)
Carrying pouch (1)