Panasonic 744T User Manual
Specifi cations
51
Specifi cations
System
Sampling Frequency
internal: 32, 44.1, 48, 48.048, 88.2, 96, 96.096, 176.4, 192 kHz
external: 32–192 kHz via word clock input
external: 32–192 kHz via word clock input
Internal Data Path and
Processing
Processing
32 bit, 192 dB dynamic range
A/D, D/A Converters
24 bit, 192 kHz sample rate maximum. A/D converters on socketed, field-upgradeable
daughter board
daughter board
A/D Dynamic Range
114 dB, A-weighted bandwidth
110 dB, 20 Hz – 22 kHz bandwidth
110 dB, 20 Hz – 22 kHz bandwidth
D/A Dynamic Range
112 dB, A-weighted bandwidth
108 dB, 20 Hz–22 kHz bandwidth
108 dB, 20 Hz–22 kHz bandwidth
Metering
76-segment (4 x 19), sunlight-viewable
selectable peak, VU, or peak (with or without peak hold) with VU ballistics, variable brightness
selectable peak, VU, or peak (with or without peak hold) with VU ballistics, variable brightness
Analog Input
(all measurements at Fs 96 kHz, 24 bit unless noted)
Frequency Response
Mic or Line: 10 Hz–40 kHz, +0.1,
−0.5 dB (gain controls centered)
Equivalent Input Noise
Mic:
−133 dBu max (−135 dBV), 50 ohm source, A-weighted filter
Mic:
−131 dBu max (−133 dBV) max, 50 ohm source, 20 Hz–20 kHz BW flat filter, gain fully up
Mic:
−130 dBu max (−132 dBV), 150 ohm source, A-weighted filter
Mid:
−128 dBu max (−130 dBV), 150 ohm source, 20 Hz–20 kHz BW flat filter, gain fully up
THD + Noise
Mic: 0.004% max (1 kHz, 22 Hz–22 kHz BW, gain control down,
−15 dBu input)
Line: 0.004% max (1 kHz, 22 Hz–22 kHz BW, gain control down, +16 dBu input)
Gain
(input dBu to
(input dBu to
−20 dBFS)
Mic (normal gain mode): 25–70 dB
Mic (low gain mode): 10–55 dB
Line:
Mic (low gain mode): 10–55 dB
Line:
−6–18 dB, 0.1 dB increments
Input Clipping Level
Mic input:
−5 dBu minimum (normal gain mode, gain control fully down)
Mic input: +10 dBu minimum (low gain mode, gain control fully down)
Line input: +26 dBu minimum (gain control fully down)
Line input: +26 dBu minimum (gain control fully down)
Input Topology
Mic and Line: fully electronically balanced, RF, ESD, short, and overload protected; pin-2 hot,
pin-3 cold
pin-3 cold
Gain Matching
Line inputs: ±0.1 dB, channel-to-channel
Common Mode Rejection
Ratio
Ratio
Mic: 40 dB minimum at 80 Hz
High-Pass Filters
40, 80, 160, 240 Hz @ 12/18/24 dB/oct (all menu selectable)
Mic Powering
(each XLR selectable):
(each XLR selectable):
48 V phantom through 6.8k resistors, 10 mA per mic available, menu-selected per channel in mic
or line level positions
or line level positions
Mic Input Limiters
analog (pre-A/D converter), dual-stage optocoupler and FET,
−4 dBFS threshold, 20:1 limiting ratio, 5 mS attack time, 200 mS release time
Output Analog
Line Output Clipping
Level
Level
+24 dBu minimum, 10k ohm load
Attenuation & Resolution 0–40 dB, 1 dB increments
Output Topology
Line: fully electronically-balanced, RF, ESD, short, and overload protected; pin-2 driven hot,
pin-3 driven cold; let pin-3 float for unbalanced connections.
pin-3 driven cold; let pin-3 float for unbalanced connections.