MD Portable Recorder [MD-MT50] New Model

22 February 2000
Sharp Corporation

MD-MT50 Features

Recording Portable Type First^:1 , AA Cell Compatible Design
It can run on Nickel-Metal Hydride & Dry cells.

-	If the rechargeable battery runs out while you're out, simply insert a dry cell into the unit. You can relax.
-	There's no need for an external battery case, so you can carry it smartly outdoors.
-	The heart of the MD is the latest 0.25um 6th generation low power technology ATRAC LSI, giving 6.5 hours playback / 4.5 hours recording on a Nickel-Metal Hydride battery, or 7hrs / 3hrs on an Alkaline battery.

:1 AA cell internal type: As of 22 February 2000

Enhanced Mic (Mic sold separately) Recording Functions Added
For meetings. lectures, & business use there are many Mic recording functions.

-	Recording automatically starts when a voice is detected. When no voice is sensed, it stops. [Mic Synchro Record] Thus none of the disc is wasted.
-	Fixed Interval Automatic Track Marking ( 3 / 5 / 10 minutes ) [Time Automark Function] This is very convenient for playback.
-	Mono recording allows twice the recording time on one disc. [Monoaural Longplay 2x Record Function] (Also possible when not using the Mic) There's also a double speed playback mode, where you can listen to recordings at twice their original speed. {possibly mono recordings only? didn't quite get it}

Internal Sampling Rate Convertor

-	You can make and edit direct digital recordings of the music from CS & BS broadcasts. (Use the Optical Cable AD-M1DC (sold separately))
-	You can make direct digital recordings of music obtained from the net with a computer. (Use the Digital Soundcard AD-AJ2 & Optical Cable AD-M2DC (both sold separately))

High Sound Quality Design

-	We've upgraded to the use of combo style dual rail supply audio circuitry. Thus there's none of the sound deterioration associated with condenser (capacitor) outputs, so you can have more enjoyable playback.
-	The volume control uses an analog attenuator. Even when playing back at low volume, the DA converter & ATRAC are operating over their full range.
-	As MD sound quality is fundamentally affected by the compression / expansion ATRAC components, we've used a 24 bit processing design. Enjoy clear carefree high quality sound.
-	For full bass reproduction we've adopted digital X-Bass. It adds very little noise, but increases the enjoyment of bass.

5.	Fashionable Handstrap Attachment You can attach any cellphone strap you like. {Cellphone accessories are HUGE in Japan}

6.	Random Play, All Songs, 1 Song, Random Repeat functions have been included.

MD-MT50 Accessories

-	AA Nickel-Metal Hydride Battery	AD-N70BT	RRP 1500 yen	Scheduled for 15th March
-	AC Adaptor	AD-SS70AP	RRP 5000 yen	In production
	[Worldwide 100-240V Type]
-	Stereo Headphones	HP-MD70	RRP 3500 yen	In production
-	Car Power Adaptor (For 12V/24V Cars)	AD-CA20X	RRP 5000 yen	In production
-	Cassette Adaptor	AD-CT13	RRP 3500 yen	In production
-	LCD Clock Remote Control	AD-S31RM	RRP 7500 yen	In production
-	Tiepin Mic	MC-TP1	RRP 7800 yen	In production
		MC-TP2	Open Price	In production
-	Boundary Mic	MC-BD1	RRP 10000 yen	In production
-	Optical Cable	AD-M1DC	RRP 3000 yen	In production
		AD-M2DC	RRP 3000 yen	In production
-	Digital Soundcard	AD-AJ2	RRP 25000 yen	In production

MD-MT50 Specifications

Product

MD Portable Recorder

Model

MD-MT50 - S (Prussian Silver) / - A (French Blue)

Format

Minidisc Digital Audio System

Recording Method

Magneto-Optical Overwrite System

Reading Method

Contactless Optical Pickup (Semiconductor Laser)

RPM

400-900RPM

Error Correction
Method

Advanced Cross Interleave Reed/Solomon Code (ACIRC)

Channels

Stereo 2 Channels / Mono (Long Play Mode) 1 Channel

Sampling
Rate

44.1kHz (32kHz, 48kHz, & 44.1kHz can be recorded.)

Sound Compression
Method

ATRAC (Adaptive TRansform Acoustic Coding)
24 Bit Processing

Frequency Response

20-20 000 Hz (+-3dB)

Wow / Flutter

Below the measurable limit (+-0.001% W. Peak)

Inputs

Combined Line/Optical, Mic (Plug-in Power)

Outputs

Combined Headphone/Remote Control Terminal

Input Sensitivity

Recording Level	Standard Input Level	Input Impedance
MIC H	0.25mV	10kilohms
MIC L	2.5mV	10kilohms
LINE	100mV	20kilohms

Output Level

	Fixed Output	Maximum Output Level	Load Impedance
Headphone	-	10mW+10mW	32ohms
Line	250mV (when -12dB)	-	10kilohms

Power

DC 1.2V	:	Supplied NiMH AA Cell (AD-N70BT) x1
DC 1.5V	:	Separate Alkaline AA Cell 1.5V x1
DC 4.5V	:	Separate Car Power Adaptor (AD-CA20X) (DC 12V/24V Negative Earth Vehicles Only)
DC 5.0V	:	Supplied AD Adaptor (100VAC, 50/60Hz)

Battery Duration Time

Using the included rechargeable (full charge) AD-N70BT	Using 1 high capacity Alkaline
Continuous Recording 4.5hrs	Continuous Recording 3.0hrs
Continuous Playback 6.5hrs	Continuous Playback 7.0hrs

*	Recording Times	-	Analog Input, Volume Level "Vol 0"
*	Playback Times	-	Volume Level "Vol 15"

Recharge Times

3.5hrs (90%) / 5.5hrs (full charge)
using the supplied AC adaptor

External Dimensions

99.9 x 22.9 x 77.9 mm

Weight

191g (Rechargeable Battery Included)

Supplied Accessories

- Remote Control		- AC Adaptor
- Headphones		- Carry Case
- Rechargeable NiMH AA Cell		- Instruction Book
(Battery Case included)		- Warranty Card