Easy
to installation and use GUI (Graphical User Interface)
Free Software upgradeabl
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Question & Answer
Transmitter System Series:
The following are the most frequently asked questions(Q-01); they are also the most difficult to answer.
Q-01: As indicated in your brochure, the transmission range is specified in an empty space free of barriers. However, with barriers, what is the transmission range? How many floors or how many walls can be penetrated? What is the transmission range for a 2000mW transmitter in a city? Why does it only transmit 200 meters while the labeled transmission range is 1000 meters?
A: Transmission range varies greatly with environment. Barriers differ in height, walls in thickness, woods in density, etc. If a 2000mW transmitter can transmit 2-5 km, in places where there are many buildings it is possible to transmit a few tens to a few hundreds of meters; it is also possible for transmission to be completely blocked. In an environment where barriers are present, we can place outdoor antennas from two ends of the transmission as high as possible and in line-of-sight; the maximum transmission distance measured in this manner would then be our specified transmission range.
Q-02: How do I test a newly purchased wireless audio-video transceiver system?
A: STEP A: Connect the video camera to a power source, connect it to the TV monitor, and make sure that the camera and the monitor are working properly. STEP B: Make sure that the power sources used in the transmitter and the receiver can provide enough current; usually an off-the-shelf transformer will specify 1000mA when the output is only 700mA. Normally, the receiver requires 12V/600mA or more while a 700mW or lower transmitter will require 12V/800mA or more (1W transmitter 12V/2A or more and 2W transmitter 12V/3A or more). You can also use rechargeable or storage batteries. STEP C: Connect the camera, the transmitter and the power source properly; similarly connect the monitor, the receiver and the power source. Adjust the dials on the receiver to select the proper channel, making sure that it is the same on the transmitter. The system should then function normally. Q-03: During testing, how come I can only transmit tens of meters if you specify the transmission range to be several thousand meters?
A: Due to the limitation of power sources, people often place the transmitter and receiver in different rooms where transformers are used to supply power. This inadvertently creates the largest barrier between the transmitter and the receiver, as steel-reinforced concrete is the strongest barrier for radio wave. During testing, please make sure that there are as little barrier as possible between the transmitter and the receiver; you can extend the connection wires so that there is light-of-sight between the transmitter and receiver antennas. This way, the true transmission range of the system can be determined.
Q-04: Why do I see rolling black lines on the monitor while using the wireless audio-video transceiver system?
A: This is usually caused by insufficient current from the power source of the transmitter or the receiver, or by a low-quality transformer. Switching to a proper transformer will usually suffice. Note that off-the-shelf transformers that are labeled 12V/800mA usually output only around 300 ¨C 400mA.
Q-05: What¡¯s the resolution of your wireless audio-video transceiver system? Why are my transmitted images blurry?
A: The system does not alter image resolution. Resolution is determined by the video camera. If your received images are blurry, please check your video camera.
Q-06: Can interference occur if another transceiver system is being used in the vicinity?
A: As far as we know, there are four channels available in transceivers manufactured by other companies while there are twelve channels available in our system. It is therefore possible for our system to avoid using the same channel as others. If you select a channel other than the normal four, then there will not be any interference.
Q-07: When using your wireless audio-video transceiver system, can other people receive my transmission? Can you provide encryption services?
A: If others are using our wireless audio-video transceiver system in your area, then it is possible for them to receive your signals. If you have special requirements, we can provide encrypted audio-video transceiver service.
Q-08: Your receiver has twelve channels, but your transmitter has only either seven or four channels. Can you provide twelve-channel transmitters?
A: Due to size limitation, our transmitters come with only four or seven channels. If you require the use of all twelve channels in the same location, we can provide transmitters with three different frequency ranges: 0.9GHz (four-channel), 1.2GHz (four-channel), 1.3GHz (four-channel), with a total of twelve channels. Our receiver can receive all the above frequencies.
Q-09: Using your system, how many units can be used in the same area? In other words, how many transceiver points are allowed?
A: Our civilian-class wireless audio-video transceiver system can provide twelve channels, thus twelve units can be used. Our military-class system can provide thirty channels, in other words, in the same area 30 points are allowed. However, these need to be custom-ordered.
Q-10: How many types of antennas are there? What are their different uses?
A: There are generally two types of antennas in wireless audio-video transceiver systems: directional and omni-directional. As the names suggest, directional antennas transmit radio signals in some specified direction, and omni-directional antennas transmit radio signals in all directions. Usually, directional antennas are used in point-to-point transmission while omni-directional antennas are used in point-to-many transmission. Q-11: Are external antennas used on the transmitter or the receiver?
A: Both, although usually it is used on the transmitter. Of course, the system functions even better if antennas are used on both the transmitter and the receiver.
Q-12: Which system models require an external antenna? What is the actual effect of using an external antenna? Why do I get a shorter transmission range after I connected an external antenna compared to using the small built-in antenna?
A: In normal situations, wireless audio-video transceiver systems with transmission power larger than 300mW can use an external antenna; this can increase transmission range by 30% - 70% in an open environment without barriers. When using the external antenna, if the system does not function as well as using the small built-in antenna, then the only possibility is that the external antenna has not been connected properly. This includes the connections among the connectors on the antenna, as well as the connection between the antenna and the transmitter. Especially, the center-pin of the external antenna connector must be precisely inserted into the small hole in the transmitter¡¯s connector, otherwise the external antenna will not function at all.
Q-13: What is the function of the wireless camera platform/lens transceiver system? How many camera platform/lens can it control? What protocols does it support? Does it have built-in decoders? Can it control the on-off switch, the wiper, or the heater switch?
A: The wireless camera platform/lens transceiver system is used in areas where it may not be convenient to place wires. It remotely and wirelessly controls the up, down, left, right, left-up, left-down, right-up, and right-down motion of the camera platform, as well as the aperture, focal length, and focus of the electric zoom lens. It can control 100 units of platform/lens. It supports a built-in proprietary protocol and no other protocols. The system¡¯s receiver itself is a decoder, with a built-in keyboard. It can control the on-off switch, the wiper, and the heater switch.
Q-14: What is the function of the hard-disk video recorder/matrix wireless transceiver system (Wireless 485/232 command transceiver system)? How many camera platform/lens can it control? What protocols does it support? Does it have built-in decoders? What transmission speed does it support? Can it control the on-off switch, the wiper, or the heater switch?
A: Simply, the wireless hard-disk video recorder transceiver system removes the wire connection between the hard-disk video recorder and the video camera. Its function is identical to the wireless camera platform/lens transceiver system, with the added functionality of video recording. Other functions are determined and supported by the decoder. There is no limitation to the number of platform/lens units it can control. It supports protocols from major manufacturers such as PELCO, PHILIPS, Panasonic, VICON, etc. It does not have a built-in decoder. Supported speeds are 1200, 2400, 4800 and 9600 baud.
Q-15: What is the difference between the wireless camera platform/lens transceiver system and the hard-disk video recorder/matrix wireless transceiver system (Wireless 485/232 command transceiver system)?
A: These two systems function nearly identically. The differences are that the wireless camera platform/lens transceiver system operates independently, and can not be connected to a hard-disk video recorder; it also has a built-in proprietary protocol, a decoder, and a keyboard. On the other hand, the hard-disk video recorder/matrix wireless transceiver system (Wireless 485/232 command transceiver system) operates in combination with the hard-disk video recorder, the matrix, and other computer equipment; it does not have a built-in keyboard or decoder.
Q-16: Why does the hard-disk video recorder/matrix wireless transceiver system (Wireless 485/232 command transceiver system) is completely dysfunctional?
A: It is almost certain that the connections are not set up properly. When using the system, please first directly connect the hard-disk video recorder with the camera platform/lens. Once you are sure both are function normally, remove the direct connection and connect the wireless system. The system should then function normally.
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