Choice: On | Off
Default: Off
Double-click or use the drop-down menu to enable or disable adding real-time, non-repeating additive white Gaussian noise (AWGN) to the carrier being modulated by the waveform being played.
– enables the addition Real-time Noise.
– disables the addition of Real-time Noise.
Range: -100 to 100 dB
Default: 0 dB
Enter the noise power as a ratio of carrier power to noise power (C/N) that is applied to a waveform. The carrier power is defined as the total modulated signal power before noise power is added. When you add noise, the power output from the signal generator does not change; it is the sum of carrier power and the added noise power. A positive value makes C larger than N.
Range:
N5162A/N5182A 1.0 Hz to 125 MHz
N5172B/N5182B: 1.0 Hz to 200 MHz
E4438C/E8267D 1.0 Hz to 80 MHz
Default: 1.0 Hz
Specifies the bandwidth over which the noise power is integrated for calculating the carrier to noise ratio (the bandwidth of the target carrier).
Range: 1 to 2
Default: 1
Displays the flat noise bandwidth factor for the applied real-time noise.
When the Sample Clock is ≤ 50 MHz, the Noise Bandwidth Factor adjusts the RF flat noise bandwidth to be either at least 0.8 times the sample rate for a bandwidth factor of 1, or 1.6 times the sample rate if the bandwidth factor is 2.
When the Sample Clock is > 50 MHz, noise cannot be enabled if the Noise Bandwidth Factor is 2. Any oversampling in a waveform will effectively make the noise bandwidth that many times wider than the signal bandwidth.
The Noise Bandwidth is calculated as follows:
The noise bandwidth is at least 0.8 * [ARB Sample Clock] * [Noise Bandwidth Factor]
This parameter is not available for all instrument model numbers and may be greyed out.
Range: 1 Hz to 160.000 MHz, the limits are affected by the instrument types and options.
Default: 1 Hz
Sets the flat noise bandwidth, which is typically set wider than the carrier bandwidth.
This parameter is not available for all instrument model numbers and may be greyed out.