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What is a pickup? It is a sound pickup accessory used for synchronous monitoring system recording. Graphically speaking: The camera is the eye and the pickup is the ear. DVRs store sounds and images, and monitors and speakers are used for playback.
Is the microphone a microphone? Not all right. The pickup not only includes a high-sensitivity microphone, but also incorporates a preamplifier circuit. Therefore, the pickup can be directly connected to the DVR, active speakers, headphones, sound cards, etc., and the microphone needs to be connected to the amplifier. In addition, ordinary microphones are usually directional and low-sensitivity, and they are aligned at very close distances. The pickups are mostly designed to be highly sensitive, non-directional, or omni-directional in order to pick up sound farther.
Pickup installation considerations
Do not use near water. Only use a damp cloth for surface cleaning. Do not spray liquid on the pickup, as it will destroy the pickup circuit. Install the pickups as instructed in the manual. Do not install the pickup in places with heat sources such as microwave ovens, heaters, stoves, power amplifiers, etc. Do not remove the safety ground wire of the power supply and confirm that the power supply will not be pinched or stepped on, especially at both ends of the power cable. Try to use the accessories or accessories provided by our company. The use of standard professional audio equipment to use, give full play to its effectiveness. During installation, confirm that moving the cable will not cause harm to the equipment or personnel. Lightning weather or long-term unused, please save this. Provide detailed maintenance information for professional service personnel. When the pickup has problems, including: damage to the power cord, liquid or other items entering the interior of the pickup, when the pickup is exposed to rain or moisture, improper operation, or falling from a height, do not repair by yourself. In general, the pickup will have some heat during work, use it in a dry and ventilated place, and keep it away from other devices by more than 10 cm. When this pickup is used with a power amplifier and a headphone or speaker, it may cause high sound pressure that can damage your hearing. Do not use it under high sound pressure or harsh conditions for a long time. If you feel hearing loss or tinnitus, you need to go Do auditory correction. When not in use for a long time, pack the pickups and keep them dry.
Install the pickup process
1. Selection of Pickup Locations Pickups can be ceiling mounted or suspended on the side of a wall. The installation location should be as close to the main conversation area as possible. For example, the interrogation room may be installed near the person being tried; the classroom may be installed near the podium; and the small meeting room may be installed at the center of the ceiling. Installation principle: Try to get close to the main conversation area. This kind of pick-up effect is better.
2. Selection and Wiring of Pickup Connecting Cables The technical requirements of the connecting cables of the pickups are low, and it is possible to use common 4-core telephone lines, Category 5 network twisted pairs, and shielded/unshielded signal cables. Considering the complex construction environment, it is recommended to use a 0.5mm2 cross section 3-core signal cable. The commonly used 3 × 0.5 RVVP cable, as shown in the following figure: pickup power supply generally uses a remote centralized power supply (ie centralized power supply in the audio recording equipment / amplification equipment), the use of the three-core cable, respectively, for the power cord, Audio signal lines, public grounds. Shielded cables can be used in electromagnetic complex environments where the shielding layer is connected to the equipment ground. That is, the shielding net connected to one end of the pickup is suspended, and the shielding net connected to one end of the audio device is connected to the equipment ground (chassis). Note: It is best to route the cables separately. Do not use the same cable tray with strong AC power, and try to keep away from strong electromagnetic interference devices such as transformers and luminaire rectifiers.
3, the connection of the positive power cord method Pickup power supply method requires the use of remote centralized power supply (ie, concentrated in the audio recording equipment / amplification equipment side power supply), its main purpose is to have stronger anti-jamming and noise capabilities. It is recommended to use the 15V DC regulated high-quality power supply provided by our pickup adapter (see the instructions for use of the pickup adapter below) to avoid degradation of sound quality due to dirty power supply.
This series of pickups can use 8V-20V wide range DC power supply, DC12V is recommended. If the power line is greater than 500 meters, due to the line loss generated by the voltage drop, it is recommended to use 15V-20V DC power supply.
Because the pickup is a very sensitive small-signal amplification device, it is sensitive to the clutter of the power supply, and it is necessary to use a clean, high quality DC stabilized power supply with a small amount of clutter. The current consumed by a single SWIFT pickup is approximately 10-30 mA, which means that a nominally 1 amp DC regulated power supply can operate at least 10 SWIFT pickups at the same time. The power supply efficiency and line loss should be taken into consideration in the application. Try to use a power supply with a higher nominal value. The DC stabilized power supply referred to here is often referred to as a "transformer" and is generally composed of a power transformer, a rectifier diode, a filter capacitor, and an integrated voltage regulator. Can not use switching power supply, it may introduce a lot of circuit noise to the pickup! What is a switching power supply? Simply put, it is a switch type DC power supply, which is an automatic power supply with an electronic switch and an electronic switch oscillator. For example, an ordinary desktop computer power supply is a switching power supply.
4. The common ground connection of the negative pole of the power supply and the audio ground wire The audio ground wire and negative power supply of the SWIFT pickup are combined into one and must be connected to the negative pole of the DC stabilized power supply and the ground line of the audio input (Line In) of the audio equipment at the same time.
If the power ground and audio ground are not well connected, the sound quality will be degraded or there will be no sound. If the ground of the LineIn terminal of the audio equipment is not connected to the ground of the pickup, the sound will generally be very small.
5, audio cable connection audio signal line and audio ground can be directly connected to the device: Acoustic headphones, active speakers, audio amplifier, audio and video distributor, DVR hard disk recorders, video servers, mixers, tape recorders, sound cards Line In linear input for other audio devices (microphone connection is strictly prohibited).
(1) Hard disk recorders Most hard disk recorders have corresponding audio input ports, which are generally coaxial cable BNC plugs. The pickup audio cable needs to be connected to the center pin position of the BNC plug. The pickup must be connected to the shell of the BNC plug (that is, the shielded copper mesh connected to the coaxial cable) (2), and the self-powered active speaker. A set of ordinary active speakers are generally left and right, corresponding to the left and right audio channels, respectively. This pickup only provides one sound source, so it is a "mono" sound source. The audio cable of the pickup is connected to the left/right audio cable of the speaker cable, and the pickup is connected to the ground of the speaker cable in common. (3) Other methods of connecting audio equipment such as power amplifiers and mixing consoles are the same as those described above. (4) It is forbidden to connect the pickups to the microphone (MIC) input terminals of sound cards, mixers, amplifiers, etc., otherwise the equipment may be damaged. This is because the interior of the pickup contains a microphone, but it also includes circuits for amplification, noise reduction, echo processing, etc., and outputs a Line Out audio signal of 1 Vpp or more. (5) Notebook computers are rarely equipped with Line In audio input jacks, generally only equipped with MIC input jacks and SPEAKER output jacks. The pickups cannot be directly connected to the MIC port, and only one professional external USB interface desktop sound card can be purchased, and the LineIn port can be used to connect. (6) The pickup audio cable cannot be directly connected to the two audio devices. The pickup adapter must be connected to avoid deterioration of the sound quality due to impedance mismatch. Note: During all connections or toggle switches, adjust the volume of your amplifier to a minimum to avoid momentary electrical shock.
6, pickup sound gain (volume size) adjustment must be noted: pickup sound output over the General Assembly led to hard disk recorders, speakers and other back-end audio equipment sound blocking sound quality deterioration. Please pay attention to adjust to a proper level.
7. Pickup Adapter Connection The yellow INPUT1 and INPUT2 terminals in the rear panel correspond to the wiring of the two pickups. The middle mark is A's patch cord to connect the audio cable of the pickup, the sign is V's wire hole to connect the power cable of the pickup, and the sign is G's plug hole to pick up the public ground of the pickup. The yellow OUT1 and OUT2 terminals respectively correspond to the output wiring of the two pickups and can be connected to the Line-In input of other audio devices, where A is the audio line and G is the audio ground. MIX is the mixed output of two pickups. OUT1 and OUT2 indicate the output of the lotus head corresponding to the sound output of the 1 and 2 way pickups. MIX is the output terminal after the 1 and 2 channels are mixed. The above audio output terminal and the headphone jack on the front panel output the same sound, but the front panel headphone jack is easier to test. These terminals/jacks can be connected to different audio devices (hard disk recorders, mixers, headphones, etc.) at the same time.
Is the microphone a microphone? Not all right. The pickup not only includes a high-sensitivity microphone, but also incorporates a preamplifier circuit. Therefore, the pickup can be directly connected to the DVR, active speakers, headphones, sound cards, etc., and the microphone needs to be connected to the amplifier. In addition, ordinary microphones are usually directional and low-sensitivity, and they are aligned at very close distances. The pickups are mostly designed to be highly sensitive, non-directional, or omni-directional in order to pick up sound farther.
Pickup installation considerations
Do not use near water. Only use a damp cloth for surface cleaning. Do not spray liquid on the pickup, as it will destroy the pickup circuit. Install the pickups as instructed in the manual. Do not install the pickup in places with heat sources such as microwave ovens, heaters, stoves, power amplifiers, etc. Do not remove the safety ground wire of the power supply and confirm that the power supply will not be pinched or stepped on, especially at both ends of the power cable. Try to use the accessories or accessories provided by our company. The use of standard professional audio equipment to use, give full play to its effectiveness. During installation, confirm that moving the cable will not cause harm to the equipment or personnel. Lightning weather or long-term unused, please save this. Provide detailed maintenance information for professional service personnel. When the pickup has problems, including: damage to the power cord, liquid or other items entering the interior of the pickup, when the pickup is exposed to rain or moisture, improper operation, or falling from a height, do not repair by yourself. In general, the pickup will have some heat during work, use it in a dry and ventilated place, and keep it away from other devices by more than 10 cm. When this pickup is used with a power amplifier and a headphone or speaker, it may cause high sound pressure that can damage your hearing. Do not use it under high sound pressure or harsh conditions for a long time. If you feel hearing loss or tinnitus, you need to go Do auditory correction. When not in use for a long time, pack the pickups and keep them dry.
Install the pickup process
1. Selection of Pickup Locations Pickups can be ceiling mounted or suspended on the side of a wall. The installation location should be as close to the main conversation area as possible. For example, the interrogation room may be installed near the person being tried; the classroom may be installed near the podium; and the small meeting room may be installed at the center of the ceiling. Installation principle: Try to get close to the main conversation area. This kind of pick-up effect is better.
2. Selection and Wiring of Pickup Connecting Cables The technical requirements of the connecting cables of the pickups are low, and it is possible to use common 4-core telephone lines, Category 5 network twisted pairs, and shielded/unshielded signal cables. Considering the complex construction environment, it is recommended to use a 0.5mm2 cross section 3-core signal cable. The commonly used 3 × 0.5 RVVP cable, as shown in the following figure: pickup power supply generally uses a remote centralized power supply (ie centralized power supply in the audio recording equipment / amplification equipment), the use of the three-core cable, respectively, for the power cord, Audio signal lines, public grounds. Shielded cables can be used in electromagnetic complex environments where the shielding layer is connected to the equipment ground. That is, the shielding net connected to one end of the pickup is suspended, and the shielding net connected to one end of the audio device is connected to the equipment ground (chassis). Note: It is best to route the cables separately. Do not use the same cable tray with strong AC power, and try to keep away from strong electromagnetic interference devices such as transformers and luminaire rectifiers.
3, the connection of the positive power cord method Pickup power supply method requires the use of remote centralized power supply (ie, concentrated in the audio recording equipment / amplification equipment side power supply), its main purpose is to have stronger anti-jamming and noise capabilities. It is recommended to use the 15V DC regulated high-quality power supply provided by our pickup adapter (see the instructions for use of the pickup adapter below) to avoid degradation of sound quality due to dirty power supply.
This series of pickups can use 8V-20V wide range DC power supply, DC12V is recommended. If the power line is greater than 500 meters, due to the line loss generated by the voltage drop, it is recommended to use 15V-20V DC power supply.
Because the pickup is a very sensitive small-signal amplification device, it is sensitive to the clutter of the power supply, and it is necessary to use a clean, high quality DC stabilized power supply with a small amount of clutter. The current consumed by a single SWIFT pickup is approximately 10-30 mA, which means that a nominally 1 amp DC regulated power supply can operate at least 10 SWIFT pickups at the same time. The power supply efficiency and line loss should be taken into consideration in the application. Try to use a power supply with a higher nominal value. The DC stabilized power supply referred to here is often referred to as a "transformer" and is generally composed of a power transformer, a rectifier diode, a filter capacitor, and an integrated voltage regulator. Can not use switching power supply, it may introduce a lot of circuit noise to the pickup! What is a switching power supply? Simply put, it is a switch type DC power supply, which is an automatic power supply with an electronic switch and an electronic switch oscillator. For example, an ordinary desktop computer power supply is a switching power supply.
4. The common ground connection of the negative pole of the power supply and the audio ground wire The audio ground wire and negative power supply of the SWIFT pickup are combined into one and must be connected to the negative pole of the DC stabilized power supply and the ground line of the audio input (Line In) of the audio equipment at the same time.
If the power ground and audio ground are not well connected, the sound quality will be degraded or there will be no sound. If the ground of the LineIn terminal of the audio equipment is not connected to the ground of the pickup, the sound will generally be very small.
5, audio cable connection audio signal line and audio ground can be directly connected to the device: Acoustic headphones, active speakers, audio amplifier, audio and video distributor, DVR hard disk recorders, video servers, mixers, tape recorders, sound cards Line In linear input for other audio devices (microphone connection is strictly prohibited).
(1) Hard disk recorders Most hard disk recorders have corresponding audio input ports, which are generally coaxial cable BNC plugs. The pickup audio cable needs to be connected to the center pin position of the BNC plug. The pickup must be connected to the shell of the BNC plug (that is, the shielded copper mesh connected to the coaxial cable) (2), and the self-powered active speaker. A set of ordinary active speakers are generally left and right, corresponding to the left and right audio channels, respectively. This pickup only provides one sound source, so it is a "mono" sound source. The audio cable of the pickup is connected to the left/right audio cable of the speaker cable, and the pickup is connected to the ground of the speaker cable in common. (3) Other methods of connecting audio equipment such as power amplifiers and mixing consoles are the same as those described above. (4) It is forbidden to connect the pickups to the microphone (MIC) input terminals of sound cards, mixers, amplifiers, etc., otherwise the equipment may be damaged. This is because the interior of the pickup contains a microphone, but it also includes circuits for amplification, noise reduction, echo processing, etc., and outputs a Line Out audio signal of 1 Vpp or more. (5) Notebook computers are rarely equipped with Line In audio input jacks, generally only equipped with MIC input jacks and SPEAKER output jacks. The pickups cannot be directly connected to the MIC port, and only one professional external USB interface desktop sound card can be purchased, and the LineIn port can be used to connect. (6) The pickup audio cable cannot be directly connected to the two audio devices. The pickup adapter must be connected to avoid deterioration of the sound quality due to impedance mismatch. Note: During all connections or toggle switches, adjust the volume of your amplifier to a minimum to avoid momentary electrical shock.
6, pickup sound gain (volume size) adjustment must be noted: pickup sound output over the General Assembly led to hard disk recorders, speakers and other back-end audio equipment sound blocking sound quality deterioration. Please pay attention to adjust to a proper level.
7. Pickup Adapter Connection The yellow INPUT1 and INPUT2 terminals in the rear panel correspond to the wiring of the two pickups. The middle mark is A's patch cord to connect the audio cable of the pickup, the sign is V's wire hole to connect the power cable of the pickup, and the sign is G's plug hole to pick up the public ground of the pickup. The yellow OUT1 and OUT2 terminals respectively correspond to the output wiring of the two pickups and can be connected to the Line-In input of other audio devices, where A is the audio line and G is the audio ground. MIX is the mixed output of two pickups. OUT1 and OUT2 indicate the output of the lotus head corresponding to the sound output of the 1 and 2 way pickups. MIX is the output terminal after the 1 and 2 channels are mixed. The above audio output terminal and the headphone jack on the front panel output the same sound, but the front panel headphone jack is easier to test. These terminals/jacks can be connected to different audio devices (hard disk recorders, mixers, headphones, etc.) at the same time.
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