2. Port identification of branch equipment is: in, OUT, TAP, TAP. This is a branching device with two branches.
3. The signals from the distributor are all the same. For example, the 306 distributor has one inlet (in) and three outlets (out), and the number of DB attenuated by each outlet is 6DB.
4. Branches can be cascaded, but branches can't, because the cascade attenuation of branches is large. After the amplifier, connect the distributor to the TV. If more than two can reach the TV, please use the middle separator.
The biggest difference between splitter and distributor is that the output port to TV is different. The splitter outputs the BR output port to the TV, while the distributor outputs the OUT output port.
6. Distributor distributes signals evenly, which is often used in cable TV. The distributor is 2 3 4 6 8 or larger.
7. The splitter takes a small amount of signals from the main road and sends them to the branch port. The power level distribution device is called a splitter.
8. The branches are different. For example, the 4 10 branch equipment has one inlet (in) and five outlets, of which only one outlet (out) and the other four outlets are BR (branch) ports. The attenuation of BR port is 10 dB, and that of OUT port is 2DB, which is what we often call insertion loss. When installing, each output hole of the distributor must not be empty, otherwise it will cause ghosting due to impedance mismatch, and generally an impedance matcher is needed. But the branch output port of a certain level of branch equipment doesn't matter much.
9. Branch/distributor difference: the output and input levels of branches are not equal, and the output and input levels of distributors are completely equal.
Extended data:
Requirements and functions of splitters and distributors;
Any C++ class that meets the requirements of distributor can be used as distributor. Specifically, when a class (here set as Class A) has a. Because in the era of 16-bit programming, far pointers are very different from ordinary pointers, allocators can define some structures to represent these pointers or references, and container class users don't need to know how to implement them.
At the same time, class A should also provide types A::size_type (indicating the used memory size) and A::difference_type (indicating the pointer difference), where size_type is an unsigned integer to indicate the maximum size of a single object in the allocation model defined by class A, and difference_type is a signed integer to indicate the difference between two pointers in the allocation model.
The allocation function is used to allocate memory in the form of a:: pointer a:: allocate (size _ type n, a).
When this function is called, it will return a pointer to the first element of the allocated new array, which is large enough to accommodate n T-class elements. It should be noted here that when calling, only memory is allocated to this array, and the object is not really constructed. The form of the deallocation function is void a:: deallocation (a:: pointer p, a:: size _ type n).
Where p is the pointer to the object to be released (with the pointer returned by the A::allocate function as the parameter) and n is the number of objects. When this function is called, all the n elements starting with p will be released, but they will not be destructed at the same time. The C++ standard explicitly requires that the objects in this address space have been destructed before calling deallocate.
The form of the maximum number function is A::max_size (). When calling, the allocation function A::allocate is called to return the largest prime number that can be allocated successfully, and its return value is equivalent to the result of A:: size _ type (-1)/sizeof (t).
References:
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