NEC ND-1300A General Specification page 11

This drive unit uses IDE interface, which conforms to the Mt. Fuji Commands for CD and DVD Devices:
SFF8090v4 rev. 1.00 to communicate with the host computer. IDE interface(ISO X3T9.2 791D) addresses the
electrical interface. The ATAPI CD-ROM specification : SFF-8020 Rev.2.6 addresses command protocol.
6.2.2 ELECTRICAL
The IDE bus uses single ended drivers and receivers.
6.2.2.1 CONNECTORS
A standard 40-pin flat ribbon cable.
6.3 AUDIO SIGNAL INTERFACE
6.3.1 ELECTRICAL
6.3.1.1 CONNECTORS
A 4-pin male connector is used for the audio line output.
6.3.1.2 OUTPUT SIGNAL CHARACTERISTICS
The following characteristic are measured at the audio line output.
AUDIO LINE OUTPUT
DISTORTION
S/N RATIO
FREQUENCY RESPONSE
20 Hz – 20 kHz
HEADPHONE OUTPUT
6.4 DATA BUFFER
The drive electronics includes 2 MBytes read ahead data buffer in the IDE CD-ROM controller.
0.75 V (rms) ±3.0 dB / 10 k
<0.10% (measured under laboratory condition)
>75 dB (measured under laboratory condition)
+3.0 dB, -3.0 dB
0.7 V (rms) ±3.0 dB / 100
load at 1 kHz : 0 dB
load at 1 kHz: 0 dB