89
Appendix B
Specifications
Item
Specifications
Voice synthesis method
Adaptive Differential Pulse-Coded Modulation (ADPCM)
Message recording time
32/48/64 seconds (switch selectable)
Message capacity
(sentences and phrases)
60 max.
Message input
(switch-selectable)
MIC IN
Microphone input: unbalanced dynamic microphone (600
Ω
)
LINE IN
Tape input: Input impedance: 50 k
Ω
, unbalanced; Maximum input voltage: 3.3 V
Message output
(switch-selectable)
SPEAKER
OUT
Built-in amplifier output: 0.14 W (8
Ω
speaker)
LINE OUT
External amplifier output: 600
Ω
unbalanced transformer output
Maximum output voltage: 0.5 V rms (effective value)
Both balanced and unbalanced external amplifiers can be connected.
Built-in monitor speaker
Diameter 27 mm, 0.1 W (8
Ω
)
Input frequency
32-second recordings: 8 kHz
48-second recordings: 5.3 kHz
64-second recordings: 4 kHz
Output frequency characteristics
32-second recordings: 100 Hz to 3.2 kHz
48/64-second recordings: 100 Hz to 2.2 kHz
Lowpass filter selector function
(see below)
Cutoff frequency: 3.2 kHz for 32-second recordings, 2.2 kHz for 48/64-second
recordings
Message memory
128K bytes RAM (battery powered)
External communication function
(for saving recorded messages)
RS-232C (Baud rate: 19,200/9,600/4,800/2,400 bps. XON/XOFF: yes/no,
CTS/RTS: yes/no)
Self-diagnosis function
CPU watchdog timer, LOW battery voltage detection
Battery life
5 years at 25
°
C (battery life is shorter for higher temperatures)
Internal current consumption
300 mA 5 VDC max.
Dimensions (mm)
35 (Width) x 130 (Height) x 100.5 (Depth)
Weight
400 g max.
LPF (lowpass filter) function
The recording time of the Voice Unit is varied by changing the unit’s input frequency. For improved sound
quality, the cutoff frequency of the lowpass filter is automatically changed to a lower frequency when the re-
cording time is increased from 32 to either 48 or 64 seconds. (The output frequency is set to 100 Hz to 2.2
kHz when the recording time is set to 48 or 64 seconds.)
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