Avisoft CM16 User manual

Repacing the CM16 microphone capsule
The microphone capsule consists of a thin metalized polyester film
and a metal back plate. Do not touch the diaphragm because its
metalization could be destroyed. It is recommended to use the
capsule always with the protective grid. However, depending on the
grid type, the frequency response may be degraded in some way.
Therefore, it is possible to remove or replace the grid by releasing
the nuts on the front side use the supplied 5.5 mm box spanner).
Due to its thin metalization, the diaphragm may deteriorate
especially under humid conditions. Therefore, it is recommended to
store the microphone in a dry place. Spare capsules are available
on request and deteriorated diaphragms will be replaced by Avisoft
Bioacoustics at a small fee. With some skill, it would also be
possible to replace the membrane foil on your own by releasing the
screws on the back of the capsule).
The condenser microphone consists of two pieces. The cylindric
preamplifier module with the 5-pole XLR connector 1 - CMPA)
is connected to the microphone capsule 2 - CM16) via a 2.5 mm
thread. This allows to replace the capsule easily. For proper
operation, both this 2.5 mm thread and the 17 mm thread on the
preamplifier module must be fastened. However, use only moderate
forces in order to prevent mechanical damages.
The integrated pre-amplifier has an internal compensation circuit
that slightly boosts frequencies above 50 kHz.
Condenser Microphone CM16/CMPA
2
1
Condenser Microphone Capsule CM16
The microphone capsule consists of a thin metalized polyester film
and a metal back plate. Do not touch the diaphragm because its
metalization could be destroyed. It is recommended to use the
capsule always with the protective grid. However, depending on the
grid type, the frequency response may be degraded in some way.
Therefore, it is possible to remove or replace the grid by releasing
the nuts on the front side use the supplied 5.5 mm box spanner).
Due to its thin metalization, the diaphragm may deteriorate
especially under humid conditions. Therefore, it is recommended to
store the microphone in a dry place. Spare capsules are available
on request and deteriorated diaphragms will be replaced by Avisoft
Bioacoustics at a small fee. With some skill, it would also be
possible to replace the membrane foil on your own by releasing the
screws on the back of the capsule).
The condenser microphone consists of two pieces. The cylindric
preamplifier module with the 5-pole XLR connector 1 - CMPA)
is connected to the microphone capsule 2 - CM16) via a 2.5 mm
thread. This allows to replace the capsule easily. For proper
operation, both this 2.5 mm thread and the 17 mm thread on the
preamplifier module must be fastened. However, use only moderate
forces in order to prevent mechanical damages.
The integrated pre-amplifier has an internal compensation circuit
that slightly boosts frequencies above 50 kHz.
Condenser Microphone CM16/CMPA
Condenser Microphone Capsule CM16
The microphone capsule consists of a thin metalized polyester film
and a metal back plate. Do not touch the diaphragm because its
metalization could be destroyed. It is recommended to use the
capsule always with the protective grid. However, depending on the
grid type, the frequency response may be degraded in some way.
Therefore, it is possible to remove or replace the grid by releasing
the nuts on the front side use the supplied 5.5 mm box spanner).
Due to its thin metalization, the diaphragm may deteriorate
especially under humid conditions. Therefore, it is recommended to
store the microphone in a dry place. Spare capsules are available
on request and deteriorated diaphragms will be replaced by Avisoft
Bioacoustics at a small fee. With some skill, it would also be
possible to replace the membrane foil on your own by releasing the
screws on the back of the capsule).
The condenser microphone consists of two pieces. The cylindric
preamplifier module with the 5-pole XLR connector 1 - CMPA)
is connected to the microphone capsule 2 - CM16) via a 2.5 mm
thread. This allows to replace the capsule easily. For proper
operation, both this 2.5 mm thread and the 17 mm thread on the
preamplifier module must be fastened. However, use only moderate
forces in order to prevent mechanical damages.
The integrated pre-amplifier has an internal compensation circuit
that slightly boosts frequencies above 50 kHz.
Condenser Microphone CM16/CMPA
2
1
2
1
Condenser Microphone Capsule CM16
Hold the preamplifier module 1) on its ribbed campling nut and turn the
CM16 capsule anticlockwise to remove it from the preamplifier module. The
protective grid can be removed by releasing the six M3 nuts. The new CM16
capsule can then be mounted in reverse order. To prevent electrostatic
dischareges that could potenmtially damage the preamplifier, one should first
briefly connect the tip of the 2.5 mm screw of the new capsule to the metal
housing of the preamolifier module before mounting it.
Repacing the CM16 microphone capsule Repacing the CM16 microphone capsule
Hold the preamplifier module 1) on its ribbed campling nut and turn the
CM16 capsule anticlockwise to remove it from the preamplifier module. The
protective grid can be removed by releasing the six M3 nuts. The new CM16
capsule can then be mounted in reverse order. To prevent electrostatic
dischareges that could potenmtially damage the preamplifier, one should first
briefly connect the tip of the 2.5 mm screw of the new capsule to the metal
housing of the preamolifier module before mounting it.
Hold the preamplifier module 1) on its ribbed campling nut and turn the
CM16 capsule anticlockwise to remove it from the preamplifier module. The
protective grid can be removed by releasing the six M3 nuts. The new CM16
capsule can then be mounted in reverse order. To prevent electrostatic
dischareges that could potenmtially damage the preamplifier, one should first
briefly connect the tip of the 2.5 mm screw of the new capsule to the metal
housing of the preamolifier module before mounting it.

Condenser Microphone Capsule CM16
The microphone capsule consists of a thin metalized polyester film
and a metal back plate. Do not touch the diaphragm because its
metalization could be destroyed. It is recommended to use the
capsule always with the protective grid. However, depending on the
grid type, the frequency response may be degraded in some way.
Therefore, it is possible to remove or replace the grid by releasing
the nuts on the front side use the supplied 5.5 mm box spanner).
Due to its thin metalization, the diaphragm may deteriorate
especially under humid conditions. Therefore, it is recommended to
store the microphone in a dry place. Spare capsules are available
on request and deteriorated diaphragms will be replaced by Avisoft
Bioacoustics at a small fee. With some skill, it would also be
possible to replace the membrane foil on your own by releasing the
screws on the back of the capsule).
The condenser microphone CMPA-P48/CM16 consists of three
components. The microphone capsule CM16 #1) is connected to
the cylindric preamplifier module CMPA #2) by means of a 2.5 mm
thread. This allows to replace the capsule easily. For proper
operation, both this 2.5 mm thread and the 17 mm thread on the
preamplifier module must be fastened. However, use only moderate
forces in order to prevent mechanical damages. The P48
polarization voltage supply unit #3) provides the polarization voltage
for the microphone capsule and the XLR-3 connector that allows to
connect the microphone to a standard microphone input that
supplies P48 phantom power at a current of up to 10mA . The CMPA
module #2) can be attached either directly to the polarization
module #3) or via the supplied 5-pole XLR extension cable.
The integrated preamplifier has an internal compensation circuit that
slightly boosts frequencies above 50 kHz.
Condenser Microphone CM16/CMPA-P48
2
1
3
Condenser Microphone Capsule CM16
The microphone capsule consists of a thin metalized polyester film
and a metal back plate. Do not touch the diaphragm because its
metalization could be destroyed. It is recommended to use the
capsule always with the protective grid. However, depending on the
grid type, the frequency response may be degraded in some way.
Therefore, it is possible to remove or replace the grid by releasing
the nuts on the front side use the supplied 5.5 mm box spanner).
Due to its thin metalization, the diaphragm may deteriorate
especially under humid conditions. Therefore, it is recommended to
store the microphone in a dry place. Spare capsules are available
on request and deteriorated diaphragms will be replaced by Avisoft
Bioacoustics at a small fee. With some skill, it would also be
possible to replace the membrane foil on your own by releasing the
screws on the back of the capsule).
The condenser microphone CMPA-P48/CM16 consists of three
components. The microphone capsule CM16 #1) is connected to
the cylindric preamplifier module CMPA #2) by means of a 2.5 mm
thread. This allows to replace the capsule easily. For proper
operation, both this 2.5 mm thread and the 17 mm thread on the
preamplifier module must be fastened. However, use only moderate
forces in order to prevent mechanical damages. The P48
polarization voltage supply unit #3) provides the polarization voltage
for the microphone capsule and the XLR-3 connector that allows to
connect the microphone to a standard microphone input that
supplies P48 phantom power at a current of up to 10mA . The CMPA
module #2) can be attached either directly to the polarization
module #3) or via the supplied 5-pole XLR extension cable.
The integrated preamplifier has an internal compensation circuit that
slightly boosts frequencies above 50 kHz.
Condenser Microphone CM16/CMPA-P48
2
1
3
Condenser Microphone Capsule CM16
The microphone capsule consists of a thin metalized polyester film
and a metal back plate. Do not touch the diaphragm because its
metalization could be destroyed. It is recommended to use the
capsule always with the protective grid. However, depending on the
grid type, the frequency response may be degraded in some way.
Therefore, it is possible to remove or replace the grid by releasing
the nuts on the front side use the supplied 5.5 mm box spanner).
Due to its thin metalization, the diaphragm may deteriorate
especially under humid conditions. Therefore, it is recommended to
store the microphone in a dry place. Spare capsules are available
on request and deteriorated diaphragms will be replaced by Avisoft
Bioacoustics at a small fee. With some skill, it would also be
possible to replace the membrane foil on your own by releasing the
screws on the back of the capsule).
The condenser microphone CMPA-P48/CM16 consists of three
components. The microphone capsule CM16 #1) is connected to
the cylindric preamplifier module CMPA #2) by means of a 2.5 mm
thread. This allows to replace the capsule easily. For proper
operation, both this 2.5 mm thread and the 17 mm thread on the
preamplifier module must be fastened. However, use only moderate
forces in order to prevent mechanical damages. The P48
polarization voltage supply unit #3) provides the polarization voltage
for the microphone capsule and the XLR-3 connector that allows to
connect the microphone to a standard microphone input that
supplies P48 phantom power at a current of up to 10mA . The CMPA
module #2) can be attached either directly to the polarization
module #3) or via the supplied 5-pole XLR extension cable.
The integrated preamplifier has an internal compensation circuit that
slightly boosts frequencies above 50 kHz.
Condenser Microphone CM16/CMPA-P48
2
1
3

Condenser Microphone Capsule CM16
The microphone capsule consists of a thin metalized polyester film
and a metal back plate. Do not touch the diaphragm because its
metalization could be destroyed. It is recommended to use the
capsule always with the protective grid. However, depending on the
grid type, the frequency response may be degraded in some way.
Therefore, it is possible to remove or replace the grid by releasing
the nuts on the front side use the supplied 5.5 mm box spanner).
Due to its thin metalization, the diaphragm may deteriorate
especially under humid conditions. Therefore, it is recommended to
store the microphone in a dry place. Spare capsules are available
on request and deteriorated diaphragms will be replaced by Avisoft
Bioacoustics at a small fee. With some skill, it would also be
possible to replace the membrane foil on your own by releasing the
screws on the back of the capsule).
The condenser microphone CM16/CMPA-5V consists of three
components. The microphone capsule CM16 #1) is connected to
the cylindric preamplifier module CMPA #2) by means of a 2.5 mm
thread. This allows to replace the capsule easily. For proper
operation, both this 2.5 mm thread and the 17 mm thread on the
preamplifier module must be fastened. However, use only moderate
forces in order to prevent mechanical damages. The polarization
voltage supply and preamplifier unit #3) provides the polarization
voltage for the microphone capsule and includes an adjustable 40
dB preamplifier with an balanced output. The CMPA module #2) can
be attached either directly to the polarization module #3) or via the
supplied 5-pole XLR extension cable.
The integrated preamplifier has an internal compensation circuit that
slightly boosts frequencies above 50 kHz.
Condenser Microphone CM16/CMPA-5V
2
1
3

Condenser Microphone Capsule CM16
The microphone capsule consists of a thin metalized polyester film
and a metal back plate. Do not touch the diaphragm because its
metalization could be destroyed. It is recommended to use the
capsule always with the protective grid. However, depending on the
grid type, the frequency response may be degraded in some way.
Therefore, it is possible to remove or replace the grid by releasing
the nuts on the front side use the supplied 5.5 mm box spanner).
Due to its thin metalization, the diaphragm may deteriorate
especially under humid conditions. Therefore, it is recommended to
store the microphone in a dry place. Spare capsules are available
on request and deteriorated diaphragms will be replaced by Avisoft
Bioacoustics at a small fee. With some skill, it would also be
possible to replace the membrane foil on your own by releasing the
screws on the back of the capsule).
The condenser microphone CM16/CMPA40-5V consists of three
components. The microphone capsule CM16 #1) is connected to
the cylindric preamplifier module CMPA #2) by means of a 2.5 mm
thread. This allows to replace the capsule easily. For proper
operation, both this 2.5 mm thread and the 17 mm thread on the
preamplifier module must be fastened. However, use only moderate
forces in order to prevent mechanical damages. The polarization
voltage supply and preamplifier unit #3) provides the polarization
voltage for the microphone capsule and includes an adjustable 40
dB preamplifier with an balanced output. The CMPA module #2) can
be attached either directly to the polarization module #3) or via the
supplied 5-pole XLR extension cable.
The integrated preamplifier has an internal compensation circuit that
slightly boosts frequencies above 50 kHz.
Condenser Microphone CM16/CMPA40-5V
2
1
3
The connection scheme of the XLR-4 connector is as follows: pin 1 black) : GND pin 2 white) : OUT- pin 3 green) : OUT+ pin 4 yellow) : +5VDC +-10% power supply
P LARIZATI N
V LTAGE GENERAT R
& ADJUSTABLE
40dB PREAMPLIFIER
5-WIRE XLR
MICR PH NE
EXTENSI N
CABLE
200V
CM16 / CMPA
MICR PH NE
1
2
3
4
5
National Instruments
E- or M-Series
DAQ device
(differential input mode)
1 GND
2 UT -
3 UT +
4 VCC +5V
4-WIRE XLR
BREAK UT CABLE
with blank cable ends
NI SCREW
TERMINAL
AI GND
AI 0
AI 8
+5V

Condenser Microphone Capsule CM16
The microphone capsule consists of a thin metalized polyester film
and a metal back plate. Do not touch the diaphragm because its
metalization could be destroyed. It is recommended to use the
capsule always with the protective grid. However, depending on the
grid type, the frequency response may be degraded in some way.
Therefore, it is possible to remove or replace the grid by releasing
the nuts on the front side use the supplied 5.5 mm box spanner).
Due to its thin metalization, the diaphragm may deteriorate
especially under humid conditions. Therefore, it is recommended to
store the microphone in a dry place. Spare capsules are available
on request and deteriorated diaphragms will be replaced by Avisoft
Bioacoustics at a small fee. With some skill, it would also be
possible to replace the membrane foil on your own by releasing the
screws on the back of the capsule).
The condenser microphone CM16/CMPA48AAF-5V consists of
three components. The microphone capsule CM16 #1) is
connected to the cylindric preamplifier module CMPA #2) by means
of a 2.5 mm thread. This allows to replace the capsule easily. For
proper operation, both this 2.5 mm thread and the 17 mm thread on
the preamplifier module must be fastened. However, use only
moderate forces in order to prevent mechanical damages. The
polarization voltage supply and preamplifier unit #3) provides the
polarization voltage for the microphone capsule and includes an
adjustable 24 dB preamplifier and anti-aliasing filter. The CMPA
module #2) can be attached either directly to the polarization
module #3) or via the supplied 5-pole XLR extension cable.
The integrated preamplifier has an internal compensation circuit that
slightly boosts frequencies above 50 kHz.
Condenser Microphone CM16/CMPA48AAF-5V
2
1
3
gain
AAF corner
frequency

The connection scheme of the XLR-4 connector is as follows: pin 1 black) : GND pin 2 white) : OUT- pin 3 green) : OUT+ GND) pin 4 yellow) : +5VDC +-10% power supply

Polar Diagram Polar Diagram Polar Diagram

The HCM16 microphone heating module for the CM16/CMPA
microphone can increase the temperature of the microphone
capsule by about 10 Kelvin above the ambient temperature, which
should prevent condensation under difficult environmental
conditions, such as dew or rain.
The USB B connector can be connected either to a free USB port of
the PC that is running the UltraSoundGate unit or alternatively to a
separate USB power supply unit or battery.
Installation
Mount the heating module to the CM16 microphone capsule in such
a way that the resistor chips on it face outwards see picture).
The protective grid might be still inserted between the microphone
capsule and the heating module. However, the efficiency the
thermal contact) would be better without the grid.
Under some circumstances, the USB cable connection between the
heating module and the computer might cause electrical
interferences that are caused by a ground loop. In this case, the
ground connection to the heating module through the USB
connector should be removed USB pin 4). This can be achieved for
instance by using a modified USB cable whose ground wire USB
pin #4, black) has been cut. The required ground connnection to the
computer would then be established exclusively through the
microphone and the UltraSoundGate ground rail.
Specifications
Electric power requirements : 0.9 W 180 mA @ 5V)
Absolute maximum power: 3.0 W 330 mA @ 9V)
Maximum supply voltage: 9 V
Electrical impedance: 27 ohm
USB-powered microphone heating HCM16

The supplied rain protection tube is inteded for protecting the
microphone and the XLR cable connector against direct rain.
Note that the installed tube will slightly affect the frequency
response and the polar pattern of the microphone. This effect
can be minimized by adjusting the tube in such a way that there
is only a short canopy about 10 mm) in front of the microphone
capsule.
The rain protection tube for the CM16/CMPA microphone can
also be combined with the microphone heating.
Rain Protection Tube

Refurbishing Kit for the Condenser
Microphone Capsule CM16
The refurbishing kit allows to replace deteriorated diaphragms of the
CM16 condenser microphone capsules. The supplied mounting
frame enables a proper assembly. However, a moderate level of skill
is required for this procedure.
1. First remove the 6 nuts from the front of the CM16 capsule and
remove the protective grid by using the supplied M3 nut driver.
The capsule is now completely disassembled except of the
aluminum back plate that is still mounted on the acrylic disk).
The old diaphragm foil can be thrown away.
3. Place one of the supplied diaphragm foils onto the mounting
ring with with the thread holes. The non-conductive side of the
foil that is marked by a black cross should be on top. Handle
the foil on its edges only.
4. Put the second mounting frame ring the one without threads)
onto the foil and align the mounting holes. Make sure that there
are no wrinkles on the foil.
5. Fix the foil between the two rings by fastening the supplied screws.
6. Place the acrylic disk [1] onto the non-conductive marked)
side of the foil and add the aluminum disk [2]. The lowering of that
disk must be outside. Align the mounting holes of the two disks.
7. Turn the entire arrangement, add the aluminum ring [3]
and align it to the holes of the two disks on the opposite side.
First insert one screw from the back side and fasten it while
applying a moderate tension to the diaphragm. Then
add the other 5 screws one after another.
8. Push the newly mounted capsule down and pull it out of the
mounting frame.
9. Center the protective grid [5] on the capsule and fasten it by
the cover ring [4] using the 6 six nuts.
1
2. Remove the M3 screws from the back of the CM16 capsule.
2
3
4
5

UltraSoundGate Charge Amplifier
with adjustable Hi-Pass Filter
The UltraSoundGate Charge Amplifier can
be used to connect a hydrophone directly
to the an UltraSoundGate xx16x main unit.
The integrated adjustable high-pass filter
allows rejecting unwanted low-frequency
noise.
The gain of the charge amplifier depends both on the nominal
capacitance of the connected hydrophone and the selected input
capacitance of the amplifier Gain = 20 log capacitance of the
hydrophone / selected input capacitance)). A hydrophone
capacitance of 3nF and an input capacitance of 1nF would provide a
gain of approximately 10 dB. The alternate input capacitance of
100pF would rise the gain to 30 dB.
The black rotary knob selects the cut-off frequency of the high-pass
filter. The filter attenuation is 6dB / octave below the selected cut-off
frequency. The labels are valid for an input capacitance of 1nF. If the
alternate 100pF setting has been selected, all frequency labels must
be multiplied by factor 10.
Care should be taken while connecting the hydrophone to the
charge amplifier. Under some circumstances it is possible that the
hydrophone or its cable have been electrostatically charged with
high voltages several thousands volts). These high voltages may
damage the sensitive input stage of the amplifier ESD). In order to
maintain the maximum possible sound quality low noise), there is
no full ESD protection circuit at the amplifier input. Therefore, the
hydrophone and its cable should be discharged before connecting
them to the charge amplifier. This can be done by short-circuiting
the hydrophone connector. Additionally, the amplifier should be
switched off either by disconnecting the amplifier from the USG
main unit or by disconnecting the USG device from the PC) before
connecting the hydrophone cable and the input impedance should
be reduced by selecting a high cut-off frequency greater than about
1 kHz). Once the hydrophone is connected to the amplifier, there is
no further danger because any potential high voltages would be
terminated by the internal resistors of the amplifier.
High-pass cut-of frequencies and input impedances
1: GND
2: positive signal output
3: negative signal output
4: +5V supply voltage should not exceed 5.5V)
5: not connected
rotary
switch
setting
cut-off
frequency at
1nF
cut-off
frequency at
100 pF (*)
input impedance
10 10 Hz 100 Hz 15 MOhm
25 25 Hz 250 Hz 6.8 MOhm
50 50 Hz 500 Hz 3,3 MOhm
100 100 Hz 1 kHz 1.5 MOhm
250 250 Hz 2.5 kHz 680 kOhm
500 500 Hz 5 kHz 330 kOhm
1k 1 kHz 10 kHz 150 kOhm
2.5k 2.5 kHz 25 kHz 68 kOhm
5k 5 kHz 50 kHz 33 kOhm
10k 10 kHz 100 kHz 15 kOhm
25k 25 kHz 250 kHz 6.8 kOhm
50k 50 kHz 500 kHz 3.3 kOhm

P48 Charge Amplifier with
adjustable Hi-Pass Filter
The Avisoft Bioacoustics Charge Amplifier
can be used to connect a passive
hydrophone to any microphone input that
supplies 48V phantom power at 10 mA.
The integrated adjustable high-pass filter
allows rejecting unwanted low-frequency
noise.
The gain of the charge amplifier depends both on the nominal
capacitance of the connected hydrophone and the selected input
capacitance of the amplifier Gain = 20 log capacitance of the
hydrophone / selected input capacitance)). A hydrophone
capacitance of 3nF and an input capacitance of 1nF would provide a
gain of approximately 10 dB. The alternate input capacitance of
100pF would rise the gain to 30 dB.
The black rotary knob selects the cut-off frequency of the high-
pass filter. The filter attenuation is 6dB / octave below the selected
cut-off frequency. The labels are valid for an input capacitance of
1nF. If the alternate 100pF setting has been selected, all frequency
labels must be multiplied by factor 10.
Care should be taken while connecting the hydrophone to the
charge amplifier. Under some circumstances it is possible that the
hydrophone or its cable have been electrostatically charged with
high voltages several thousands volts). These high voltages may
damage the sensitive input stage of the amplifier ESD). In order to
maintain the maximum possible sound quality low noise), there is
no full ESD protection circuit at the amplifier input. Therefore, the
hydrophone and its cable should be discharged before connecting
them to the charge amplifier. This can be done by short-circuiting
the hydrophone connector. Additionally, the amplifier should be
switched off either by disconnecting the amplifier from the recording
device or by switching off the recorder) before connecting the
hydrophone cable and the input impedance should be reduced by
selecting a high cut-off frequency greater than about 1 kHz). Once
the hydrophone is connected to the amplifier, there is no further
danger because any potential high voltages would be terminated by
the internal resistors of the amplifier.
High-pass cut-of frequencies and input impedances
rotary
switch
setting
cut-off
frequency at
1nF
cut-off
frequency at
100 pF (*)
input impedance
10 10 Hz 100 Hz 15 MOhm
25 25 Hz 250 Hz 6.8 MOhm
50 50 Hz 500 Hz 3,3 MOhm
100 100 Hz 1 kHz 1.5 MOhm
250 250 Hz 2.5 kHz 680 kOhm
500 500 Hz 5 kHz 330 kOhm
1k 1 kHz 10 kHz 150 kOhm
2.5k 2.5 kHz 25 kHz 68 kOhm
5k 5 kHz 50 kHz 33 kOhm
10k 10 kHz 100 kHz 15 kOhm
25k 25 kHz 250 kHz 6.8 kOhm
50k 50 kHz 500 kHz 3.3 kOhm

The 1/4" microphone power module allows to connect 1/4" or
1/8") measurement microphones directly to the UltraSoundGate
xx16x units, which can greatly simplify the use of measurement
microphones in the field otherwise a separate power supply
module / conditioning amplifier would be required). It is powered
from the UltraSoundGate base unit and includes a low-noise
preamplifier and a switchable 15 kHz high pass filter.
Compatible 1/4" preamplifiers are for instance G.R.A.S. 26AC,
B&K 2670 or Microtech Gefell MV 302.
Specifications
Input connector : female 7-pin LEMO 1B socket
Frequency range : 20 Hz ... 200 kHz
Gain : 30 dB
Inherent noise 20Hz-20kHz) : 0.5 µV -125 dBu)
Optional high-pass filter cut-off frequency : 15 kHz
Preamplifier supply voltage LEMO pin 6): 28 V
Max preamplifier supply current available at pin 6: 1 mA
Polarization voltage LEMO pin 3): 200 V derived from the USG
base unit)
Current drawn from the +5V USG base unit power supply rail
G.R.A.S. 26AC attached): 25 mA
Physical dimensions : 85 x 32 x 26 mm
Weight : 90 g
UltraSoundGate 1/4" Mic Power Module
with 7-pin LEM 1B input connector

End-user Agreement
This a legal agreement between Avisoft Bioacoustics and
the buyer. By operating this device and the accompanying
software, the buyer accepts the terms of this agreement.
1.The Device and the accompanying software is warranted to
perform substantially in accordance with the operating manual for
a period of 12 month from the date of shipment.
2.EXCEPT AS SET FORTH IN THE EXPRESS WARRANTY ABOVE,
THE DEVICE IS PROVIDED WITH NO OTHER WARRANTIES,
EXPRESS OR IMPLIED. THE VENDOR EXCLUDES ALL IMPLIED
WARRANTIES, INCLUDING, BUT NOT LIMITED TO, IMPLIED
WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
A PARTICULAR PURPOSE.
3.The Vendor’s entire liability and the Buyer’s exclusive remedy shall
be, at the Vendor’s SOLE DISCRETION, either 1) return of the
device and refund of purchase price or 2) repair or replacement of
the device.
4. THE VENDOR WILL NOT BE LIABLE FOR ANY SPECIAL,
INDIRECT, OR CONSEQUENTIAL DAMAGES HEREUNDER,
INCLUDING, BUT NOT LIMITED TO, LOSS OF PROFITS,
LOSS OF USE, OR LOSS OF DATA OR INFORMATION OF
ANY KIND, ARISING OUT OF THE USE OF OR INABILITY
TO USE THE DEVICE IN NO EVENT SHALL THE VENDOR
BE LIABLE FOR ANY AMOUNT IN EXCESS OF THE
PURCHASE PRICE.
5. This agreement is the complete and exclusive agreement
between the Vendor and the Buyer concerning the device.
End-user Agreement
This a legal agreement between Avisoft Bioacoustics and
the buyer. By operating this device and the accompanying
software, the buyer accepts the terms of this agreement.
1.The Device and the accompanying software is warranted to
perform substantially in accordance with the operating manual for
a period of 12 month from the date of shipment.
2.EXCEPT AS SET FORTH IN THE EXPRESS WARRANTY ABOVE,
THE DEVICE IS PROVIDED WITH NO OTHER WARRANTIES,
EXPRESS OR IMPLIED. THE VENDOR EXCLUDES ALL IMPLIED
WARRANTIES, INCLUDING, BUT NOT LIMITED TO, IMPLIED
WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
A PARTICULAR PURPOSE.
3.The Vendor’s entire liability and the Buyer’s exclusive remedy shall
be, at the Vendor’s SOLE DISCRETION, either 1) return of the
device and refund of purchase price or 2) repair or replacement of
the device.
4. THE VENDOR WILL NOT BE LIABLE FOR ANY SPECIAL,
INDIRECT, OR CONSEQUENTIAL DAMAGES HEREUNDER,
INCLUDING, BUT NOT LIMITED TO, LOSS OF PROFITS,
LOSS OF USE, OR LOSS OF DATA OR INFORMATION OF
ANY KIND, ARISING OUT OF THE USE OF OR INABILITY
TO USE THE DEVICE IN NO EVENT SHALL THE VENDOR
BE LIABLE FOR ANY AMOUNT IN EXCESS OF THE
PURCHASE PRICE.
5. This agreement is the complete and exclusive agreement
between the Vendor and the Buyer concerning the device.
End-user Agreement
This a legal agreement between Avisoft Bioacoustics and
the buyer. By operating this device and the accompanying
software, the buyer accepts the terms of this agreement.
1.The Device and the accompanying software is warranted to
perform substantially in accordance with the operating manual for
a period of 12 month from the date of shipment.
2.EXCEPT AS SET FORTH IN THE EXPRESS WARRANTY ABOVE,
THE DEVICE IS PROVIDED WITH NO OTHER WARRANTIES,
EXPRESS OR IMPLIED. THE VENDOR EXCLUDES ALL IMPLIED
WARRANTIES, INCLUDING, BUT NOT LIMITED TO, IMPLIED
WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
A PARTICULAR PURPOSE.
3.The Vendor’s entire liability and the Buyer’s exclusive remedy shall
be, at the Vendor’s SOLE DISCRETION, either 1) return of the
device and refund of purchase price or 2) repair or replacement of
the device.
4. THE VENDOR WILL NOT BE LIABLE FOR ANY SPECIAL,
INDIRECT, OR CONSEQUENTIAL DAMAGES HEREUNDER,
INCLUDING, BUT NOT LIMITED TO, LOSS OF PROFITS,
LOSS OF USE, OR LOSS OF DATA OR INFORMATION OF
ANY KIND, ARISING OUT OF THE USE OF OR INABILITY
TO USE THE DEVICE IN NO EVENT SHALL THE VENDOR
BE LIABLE FOR ANY AMOUNT IN EXCESS OF THE
PURCHASE PRICE.
5. This agreement is the complete and exclusive agreement
between the Vendor and the Buyer concerning the device.