The PNG7000A Series instruments generate white Gaussian
noise and provide a summing input to control signal-to-noise
(snr) or carrier-to-noise (cnr) for bit-error-ratio (ber) testing.
The output can also be used as a random source for time
domain Jitter applications. A key feature of this instrument is
its low distortion signal path that sums the user-supplied signal
with the internal precision white noise source.