In digital communications, sampling of the Analog signals is done at discrete intervals.Discrete samples of different signals are time multiplexed on a single wire.
Sampler : a) Frequency - 2 to 20 KHz,
b) Pulse width - 10 mS to 150 mSec
c) LED indicator if pulse width
exceeds 1/4 of time period of
sampling freq.
I/P sockets: 2 I/P for sampling & multiplexing.
Speech simulating : a) Facility for On/Off signal
b) Amplitude - 2V p-p,
c) Band width-upto 3KHz
Demultiplexer : Synchronous type - 2 O/Ps.
Low pass filters : 2 Nos.,cut off in audio range,
removes sampling spikes from demultiplexer O/P
All important signal are brought on the front panel
The instrument works on 230V/115V + 10%,AC Single Phase.
