DPA 5100 Руководство пользователя - Страница 4
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The LFE output
The LFE output is derived from a sum of the left and right microphones and is running through a low pass filter at 1 20 Hz and is attenuated
10 dB conforming with the LFE level standard.
Mixing the signals
The unit is in perfect surround balance and does not need any level off-sets. Simply gain all microphones equally (including the LFE signal).
However, some applications may benefit from minor adjustments to achieve the desired level balance on the 5. 1 outputs:
• News gathering/interview: Attenuate all channels but center
• Concert hall with large distance to source: Attenuate rear channels
• Acoustical zoom function: Attenuate all channels but center
Adding time delay to rear channels
To increase the sensation of spaciousness it is a recommendable trick to add time delay to the rear channels by typically 10 – 1 5 ms (corres-
ponds to the rear microphones being placed approximately 3 – 5 m (10 – 1 6 ft) behind the front microphones). This technique works best
when the surround directions are consistent, and may lack front-to-back localization accuracy when recording moving surround environments from
the rear.
Fold-down to stereo or mono
The surround signals from the 5 100 can easily be folded down for stereo or mono. Since the three front microphones are time coincident, no
comb filtering occurs when summing L, C and R.
Down-mix algorithms
Stereo fold-down
5100 surround outputs
L
R
Left
0 dB
-
Right
-
0 dB
Center
-3 dB
-3 dB
LFE
+7 dB
+7 dB
Left Surround
-6 dB
-
Right Surround
-
-6 dB
Care of microphone
DPA 5 100 is designed to be very robust and protective materials are used in the construction, including the extremely strong black fabric. Do not
try to clean the microphone as it may be damaged. Avoid all kinds of spray or fluids containing chemical components to remove static electricity
on or close to the microphone as this could cause permanent damage to the pre-polarized layer in the capsules.
DPA 5 100 is very resistant to water and can easily be used outdoors with the OC5 100 mounted, but keep it away from unnecessary exposure to
water and cleaning fluids.
Mono fold-down
Mono
-3 dB
-3 dB
0 dB
+10 dB
-6 dB
-6 dB
6
Specifications & Graphs for DPA 5100
CRITERIAS
LEFT, CENTER & RIGHT
Directional characteristics
Directional
DiPMic™ (Pressure, with interference tube)
Principle of operation
and separation baffles
Cartridge type
Pre-polarized condenser element
20 Hz - 20 kHz
Frequency range
200 Hz -16 kHz (+/- 3 dB)
Sensitivity, nominal +/- 3 dB at 1 kHz
26 mV/Pa
Equivalent noise level, A-weighted
Typ. 18 dB(A) (max. 21 dB(A))
S/N ratio (A-weighted), re. 1 kHz at 1 Pa (94 dB SPL)
Typ. 76 dB(A)
Total Harmonic Distortion (THD)
<1% up to 123 dB
Dynamic range
103 dB
Max. SPL, peak before clipping
132 dB
Output impedance
50 Ohm
Cable drive capability
100 m (328 ft)
Output balance principle
Common Mode Rejection Ratio (CMRR)
60 dB, 50 Hz - 20 kHz
Power supply
Current consumption
Typ. 5 mA (max. 5.5 mA)
Connector
Color
Dimensions
Weight
[LxWxH]
Capsule diameter
5.4 mm (0.2 in)
Cable (length / color / diameter / connector)
Maximum output voltage
1.8 Vrms / 2.5 Vpeak
Polarity
Positive
For L/R and LS/RS
Matching front/back (frequency response and
All 3 microphones are factory selected to the
sensitivity)
unit typical within 1 dB.
LEFT SURROUND & RIGHT SURROUND
LFE
Directional
Electronically derived
Pressure, with separation baffles
from L + R
Pre-polarized condenser element
20 Hz - 20 kHz
20 Hz - 120 Hz (+/- 3 dB)
100 Hz -16 kHz (+/- 3 dB)
28 mV/Pa
Typ. 20 dB(A) (max. 23 dB(A))
Typ. 74 dB(A)
<1% up to 123 dB
103 dB
100 dB
132 dB
50 Ohm
50 Ohm
100 m (328 ft)
100 m (328 ft)
60 dB, 50 Hz - 20 kHz
60 dB, 50 Hz - 20 kHz
Typ. 5 mA (max. 5.5 mA)
Typ. 5 mA (max. 5.5 mA)
5.4 mm (0.2 in)
1.8 Vrms / 2.5 Vpeak
1 Vrms / 1.4 Vpeak
Positive
Positive
Both microphones are factory selected to the
unit typical within 1 dB.
7
UNIT
3 / 2 / 1
Active signal balanced
Phantom power P48
Lemo multipin
Black
530 g (18.7 oz)
195 / 240 / 140 mm (7.7 / 9.4 / 5.5 in)
5 m (16.4 ft) / black / 9.3 mm (0.4 in) /
XLR