User`s guide

246 Agilent X-Series Signal Generators User’s Guide
Adding Real–Time Noise to a Signal (Option 403)
Adding Real–Time Noise to a Dual ARB Waveform
Figure 9-1 Real Time I/Q Baseband AWGN Softkeys
see page 247
For details on each key, use key help
as described on page 44.
The state of the noise (on or off)
is shown on the display.
Figure 9-6 on page 250
provides additional
details on these settings.
This is the stand–alone
Real–Time AWGN and the 2nd
page of the Modulation Mode
menu (see page 251).
Static graphic representation of
ARB Real–Noise AWGN (i.e.
graphic does not update as
values change).
The relationship of the values are displayed in the
static graphic of ARB Real–Time AWGN.
The Total Noise Power is the Noise Power over the
occupied noise bandwidth (NBW * 1.25).
see page 247
see page 247
For the selected carrier to noise ratio,
the bandwidth over which the noise is
integrated. Typically, Carrier
Bandwidth (CBW) is the occupied
bandwidth of the carrier.
Flat Noise Bandwidth (NBW): The
actual flat noise bandwidth (NBW),
which should be slightly wider than
the carrier bandwidth (typically 1.6
times wider). The occupied
bandwidth is =
(1.25 * the Flat Noise Bandwidth)
see page 248
The Carrier Bit Rate softkey sets the
carrier bit rate. (The default carrier bit
rate is 1 bps.)
The Carrier Bit Rate softkey is only
available when the Carrier to Noise
Ratio Format Softkey is set to E
b
/N
o
.
See also page 249.