FDM vs. FDMA. Frequency Division Multiplexing, or FDM, is a multiplexing technique for the physical layer that allows multiple low bandwidth signals to share the same high bandwidth frequency range.It is achieved by allocating a smaller frequency range to each signal that is using the same channel.ummary: 1. FDM is a physical layer multiplexing technique, while FDMA is a data link layer access method. 2. Using FDM to allow multiple users to utilize the same bandwidth is called FDMA.
Often, the first test used to diagnose anemia is a complete blood count (CBC). The CBC measures many parts of your blood. This test checks your hemoglobin and hematocrit (hee-MAT-oh-crit) levels. Hemoglobin is an iron-rich protein in red blood cells that carries oxygen to the body. Hematocrit is a measure of how much space red blood cells take up in your blood. A low level of hemoglobin or hematocrit is a sign of anemia. The normal range of these levels varies in certain racial and ethnic populations.
The ferritin test is often ordered as part of a panel of tests that examine the levels of body iron and the effects of abnormalities in iron storage.It may be ordered together with an iron level, a total iron binding capacity test, or blood cell counts. Medically Reviewed by a Doctor on 8/12/2015. ferritin test is a laboratory blood test that measures the amount of ferritin in a person's blood stream. Ferritin is the major iron storage protein in the body, so the ferritin test is ordered as an indirect way to measure the iron stores in the body.