Sambar (dish) powder. In Andhra Pradesh, it is called as "Pappu chaaru". Apart from dal and tamarind, vegetables used in preparing is few. Vegetables are onions, dosakaaya, bitter gourd and tomatoes. Sambar without lentils (but with vegetables, or dried or fresh fish) is called kuzhambu in Tamil Nadu. Sambar is usually served with steamed rice as one of the main courses of both formal and everyday south Indian cuisine. A two-course meal of sambar mixed with rice and eaten with some sort of vegetable side dish, followed by yoghurt mixed with rice, is a prime southern Indian staple. "Vada" sambar and "idli"
Pulse-position modulation Pulse-position modulation Pulse-position modulation (PPM) is a form of signal modulation in which "M" message bits are encoded by transmitting a single pulse in one of formula_1 possible required time shifts. This is repeated every "T" seconds, such that the transmitted bit rate is formula_2 bits per second. It is primarily useful for optical communications systems, which tend to have little or no multipath interference. An ancient use of pulse-position modulation was the Greek hydraulic semaphore system invented by Aeneas Stymphalus around 350 B.C. that used the water clock principle to time signals. In this system, the draining of water