Working With Symbol Rates; To Set A Symbol Rate - Keysight E8267D User Manual

Custom Arb Waveform Generator

Working with Symbol Rates

Working with Symbol Rates

The Symbol Rate menu enables you to set the rate at which I/Q symbols are
fed to the I/Q modulator. The default transmission symbol rate can also be
restored in this menu.
— Symbol Rate (displayed as Sym Rate) is the number of symbols per second
— Bit Rate is the frequency of the system bit stream. The internal baseband
— Occupied Signal Bandwidth = Symbol Rate x (1 + Filter Alpha); therefore,

To Set a Symbol Rate

1. Press Preset.
2. Press Mode > Custom > ARB Waveform Generator > Digital Mod Define >
3. Enter a new symbol rate and press Msps, ksps, or sps.
Keysight E8357D/67D & E8663D PSG User's Guide
that are transmitted using the modulation (displayed as Mod Type) along
with the filter and filter alpha (displayed as Filter). Symbol rate directly
influences the occupied signal bandwidth.
Symbol Rate is the Bit Rate divided by the number of bits that can be
transmitted with each symbol; this is also known as the Baud Rate.
generator (Option 602) automatically streams the selected Data Pattern at
the appropriate rate to accommodate the symbol rate setting (Bit Rate =
Symbols/s x Number of Bits/Symbol).
the occupied signal bandwidth is dependent on the filter alpha of the
Nyquist or Root Nyquist filter being used. (To change the filter alpha, refer
to the procedure, "Adjusting the Filter Alpha of a Predefined Root Nyquist
or Nyquist Filter" on page
Symbol Rate
or
Mode > Custom > Real Time I/Q Baseband > Symbol Rate
192.)
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