SCHOEPS CCM - Manual (Page 6)

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www.schoeps.de · [email protected]
EMC, Technical Specifications
6
Technology
are in the microvolt range (1/1,000,000 Volt).
Cable shielding and the grounding scheme of
the preamp or mixer input are also crucial.
A microphone can therefore never be expected
to be immune to all possible disturbances in
all circumstances, but the following suggestions
can help to reduce possible noise induction:
1) Keep both the microphone and the cable
away from sources of interference such as
monitors, digital equipment (computers), RF
emitters (mobile phones and other personal
communication devices that emit radio fre-
quency energy), power transformers, power
lines, SCR dimmers, switching power sup-
plies etc.
2) Use only high-quality cables with a high
degree of shield coverage.
3) Keep all cables as short as possible.
4) Dress audio cables away from power cables.
If they must cross, it should be at right angles.
5) At the preamp or mixer input, the shield of
the microphone cable should connect to
chassis ground in the shortest way possible.
If necessary, this coupling can be capacitive.
microphone, and to prevent interference.
Maximum Cable Length
Cable lengths of up to 300 meters are possible,
but the practical limit depends on the electrical
capacitance of the cable, which is sometimes
an unknown quantity. The lower this capaci-
tance is per unit length, the longer the cable
can be. All SCHOEPS cables have very low
capacitance (100 pF/m between the conduc-
tors).
The main risks with excessively long micro-
phone cables are gradual losses at high fre-
quencies due to the cable capacitance, some
reduction in ability to handle very high sound
pressure levels, and increased pickup of inter-
ference.
Hints on Avoiding Interference
SCHOEPS CCM microphone are virtually immune
to magnetic, electric and electromagnetic
fields.
Due to the wide dynamic range of studio
microphones, the smallest signal amplitudes
Current consumption: P12: 8 mA, P48: 4 mA; (automatically switched)
Source impedance: 90 Ohms
Minimum recommended load impedance: 600 Ohms
Low-cut frequency (-3 dB):
20 Hz
Polarity: increasing sound pressure on the microphone’s
0° axis produces a positive-going voltage at pin 2.
voltage at pin 2.
Maximum output voltage: ca. 1 V
Acoustical specifications can be found on page 19.
Length U-version: 46 mm – 58 mm, type-dependent
Length L-version: 46mm – 58mm without connector
Diameter: 20 mm
Weight without cable: U-version: 33 g, L-version: 43 g
Surface finish: matt gray (g) or nickel (ni)
Standard length of the cable: 5 m
Technical Specifications: