Keysight Technologies X Series User Manual

328 Keysight EXG and MXG X-Series Signal Generators User’s Guide
Adding Real–Time Noise to a Signal for N5172B/82B with Option 403 and 653/655/656/657
Adding Real-Time Noise (AWGN) to a Dual ARB Waveform
Figure 11-5 Real Time I/Q Baseband AWGN - E
b
/N
0
Adjustment Softkeys
Figure 11-6 Carrier to Noise Ratio Components
Example
Use the following steps to modulate a 1 GHz, –10 dBm carrier with the factory–supplied waveform
SINE_TEST_WFM, and then apply noise with a 45 MHz bandwidth signal that has a 30 dB carrier–
to–noise ratio across a 40 MHz carrier bandwidth.
1. Preset the signal generator and set the following:
For details on each key, use key help
as described on page56.
Mode > Dual ARB > Arb Setup > Real-Time AWGN Setup
Selects either the Carrier to
Noise Ratio (C/N) or energy per
bit over noise power density at
the receiver (E
b
/N
o
) as the
variable controlling the ratio of
the carrier power to noise power
in the carrier bandwidth. When
E
b
/N
o
is selected, the second
page of the AWGN Setup menu
shows the Carrier Bit Rate
softkey to enable the E
b
/N
o
value to be calculated.
Figure 11-6 on page328
provides additional details on
these settings.
C/N selected
E
b
/N
o
selected
Whether a softkey is available
depends on the Carrier to
Noise Ratio Format softkey
setting (e.g. C/N or E
b
/N
o
).
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
.
To view the carrier bit rate equation,
refer to page56.
E
b
/N
o
is displayed when Carrier to Noise Ratio
Format softkey is set to E
b
/N
o
.
The active
softkey changes
with the Ca rrier to
Noise Ratio
Format selected
(C/N or E
b
/N
o
).
See below.
Display remains grayed out until
real-time AWGN is enabled.

Keysight Technologies X Series Specifications

General

Brand	Keysight Technologies
Model	X Series
Category	Measuring Instruments
Language	English