Understanding carrier model number series#

In R10 and R11 three classes are defined:Д¬lass A: ATBC в‰¤ 100, maximum number of CC = 1Д¬lass B: ATBC в‰¤ 100, maximum number of CC = 2Д¬lass C: 100 < ATBC в‰¤ 200, maximum number of CC = 2 CA bandwidth class: indicates a combination of maximum ATBC and maximum number of CCs.Aggregated Transmission Bandwidth Configuration (ATBC): total number of aggregated physical resource blocks (PRB).To specify different CA combinations some new definitions are used: For non-contiguous cases the CCs are separated by one, or more, frequency gap(s).ДЇor practical reasons CA is initially specified for only a few combinations of E-UTRA operating bands and number of CCs. The spacing between the centre frequencies of two contiguous CCs is Nx300 kHz, N=integer. Carrier Aggregation Intra-band and inter-band aggregation alternatives. the component carriers belong to the same operating frequency band, but have a gap, or gaps, in between, or it could be inter-band, in which case the component carriers belong to different operating frequency bands, see figure 2.ДЇigure 2. For non-contiguous allocation it could either be intra-band, i.e. This might not always be possible, due to operator frequency allocation scenarios. The easiest way to arrange aggregation would be to use contiguous component carriers within the same operating frequency band (as defined for LTE), so called intra-band contiguous. For TDD the number of CCs as well as the bandwidths of each CC will normally be the same for DL and UL. The individual component carriers can also be of different bandwidths. However, the number of UL component carriers is always equal to or lower than the number of DL component carriers. In FDD the number of aggregated carriers can be different in DL and UL, see figure 1. The component carrier can have a bandwidth of 1.4, 3, 5, 10, 15 or 20 MHz and a maximum of five component carriers can be aggregated, hence the maximum aggregated bandwidth is 100 MHz. The CCs can be of different bandwidths.Д®ach aggregated carrier is referred to as a component carrier, CC. Carrier Aggregation (FDD) The LTE-Advanced UE can be allocated DL and UL resources on the aggregated resource consisting of two or more Component Carriers (CC), the R8/R9 UEs can be allocated resources on any ONE of the CCs. Your wholesaler can be of great assistance in cross-referencing a suitable replacement, but it is up to you to verify that it will work.Figure 1. Knowing what you need when using a universal component is key for getting the right component. Again, this can be useful when troubleshooting a compressor and trying to determine if the correct voltage is being applied. More than likely, the voltage rating of the compressor will be stated.This can help a technician identify which types of starting components are used on the compressor and Sometimes it will state if the compressor incorporates a permanent-split capacitor (PSC), start, or other motor design.Some models will state the type of oil originally included with the compressor.The Btu capacity is normally included, but, sometimes, instead of the Btu capacity, the model number will state the compressorвЂ™s motor horsepower or its displacement.Many times, the application range of the compressor can be determined, which identifies if the compressor is designed for high-, medium-, or low-temperature application.Some model numbers will also include the type of refrigerant originally designed for the compressor.The physical characteristics of the compressor series, such as its footprint, body dimensions, and layout of its stub or service valve connections, which may be useful when determining if the universal component will fit onto the compressor.Listed here is some of the information that might be obtained from the nomenclature of a compressorвЂ™s model number: This is not a difficult task the information is usually readily available from the manufacturer in their service publications. The information contained in the model number will vary from manufacturer to manufacturer, so you will need to obtain the coding used for each of the different compressors you service.

Understanding carrier model number series#

Every compressor manufacturer has its own nomenclature for its series of compressors. Again, this can be a valuable aid for a technician when trying to select a replacement component. There is much information about a compressor that can be obtained from decoding its model number. Editorial Calendar & Editor Assignments.