Sambar (dish) sambar are popular for breakfast or an evening snack in the south Indian states. Roadside restaurants often offer free refills of sambar for idli and vadas. Sambar is also served as a side dish for dosa. Sambar (dish) Sambar, also spelled sambhar or sambaar, and pronounced saambaar, is a lentil-based vegetable stew or chowder, originating from the Indian subcontinent, cooked with a tamarind broth. It is popular in South Indian and Sri Lankan cuisines. According to food historian K. T. Achaya, the earliest extant mention of sambar in literature can be dated to the 17th century. Sambar is made either
Pulse-position modulation modulation has origins in telegraph time-division multiplexing, which dates back to 1853, and evolved alongside pulse-code modulation and pulse-width modulation. In the early 1960s, Don Mathers and Doug Spreng of NASA invented pulse-position modulation used in radio-control (R/C) systems. PPM is currently being used in fiber-optic communications, deep-space communications, and continues to be used in R/C systems. One of the key difficulties of implementing this technique is that the receiver must be properly synchronized to align the local clock with the beginning of each symbol. Therefore, it is often implemented differentially as "differential pulse-position modulation", whereby each pulse position is