Keysight M8194A - Page 67

Keysight M8194A 120 GSa/s Arbitrary Waveform Generator User Guide 67
M8194A Soft Front Panel 3
• Apply Offset Freq.
This check box is only active for the I/Q Data Generation mode and it
applies a frequency shift to the signal according to the ‘Offset Freq.’
edition field. Frequency shift, unlike carrier frequency, may be positive
or negative.
• Spectrum Reversed
This check box should be selected for generation of signals in the
second Nyquist band (FS/2 – FS). Its effect is the reversion of the
fundamental signal (in the 1st Nyquist Band) in the frequency domain.
It also reverses the effect of any correction so correction factors
obtained for the second Nyquist band will be applied appropriately.
• Channel
Independent check boxes allow the definition of waveforms for
Channel 1, Channel 2, Channel 3 or Channel 4. One of the boxes will be
always selected. When pressing the ‘Send To Instrument’ button, the
waveform is sent to all channels that are selected.
• Segment Number
The segment number is 1. Please note that the segment number
section is only kept for compatibility to M8195A AWG.
Modulation Parameters Section
• Mod. Scheme
This drop-down list selects the different modulation scheme categories
that are supported (see list above).
• Mod. Type/Mod. Order
This drop-down list selects the different modulation orders or
modulation scheme sub-types for the selected modulation scheme
category.
• Carrier Freq. / Offset Freq.
The purpose and labeling of this edition field changes depending on the
generation mode. For the direct RF generation mode, it handles the
carrier frequency while for the I/Q Data Generation mode it deals with
the offset frequency (see the Apply Offset Freq. control). Units in both
cases are in Hz.
• Symbol Rate
This edition field can be used to enter the signaling speed (or baud
rate) for the modulated signal expressed in Bauds (1 Baud = 1
Symbol/s).