Question

A special PCM system uses 16 channels of data, one whose purpose is identification (ID) and synchronization. Find (a) the number of available data channels.

(a) 15

(b) 16

(c) 14

(d) 18

I have been asked this question in examination.

My doubt is from Pulse Code Modulation topic in section Radio Transmitters, Communication Receivers, Multiplexing and Demultiplexing of Avionics

Answer 1

Right option is (a) 15

To elaborate: 16 (total no. of channels) – 1 (channel used for ID) = 15 (for data).