Teledyne LeCroy ArbStudio - Manual (Page 92)

ArbStudio
84 922244-00 Rev A

Maximum Resolution = 1/max sampling frequency (max sampling
frequency = 8 ns)

Minimum Resolution = Max Resolution * X (X = 4096 for M-ASK
and X = 1048576 for M-FSK and M-PSK)

Each sample of the modulating waveform may be separated respect
to the adjacent samples by a minimum of 8ns to a maximum of
32.768us for M-ASK and by a minimum of 8ns to a maximum of 8.38
ms for M-PSK and M-FSK.
A smart control of these intervals allows editing very long modulating
signals by generating the carrier at its maximum frequency.
Summarizing the previous statements, the maximum duration for the
modulating signal is 67.076ms for M-ASK modulation (MSRP = 1, Sampling
Rate in Setup Sampling Rate= 250 MHz) and 4.29s for M-PSK and M-FSK
modulations (Sampling Rate in Setup Sampling Rate= 250 MHz).
Edit Modulation Rule
This section provides information for setting the modulation type using the
Modulation type control (DDS mode only) and the modulating signal using
the Modulating Table and the Command Bar.
Modulation Type
This control allows setting the modulation type (Frequency or Phase) in
DDS mode, while in Arbitrary mode this option is not active since the only
available modulation type is the Amplitude one.

Amplitude (M-ASK) - In an Arbitrary mode channel the Modulation
Editor tool is automatically set to M-ASK. The window allows setting
the time behavior of the amplitude modulation factor. The samples
constituting the modulating signal may assume values between 0
and 1. These samples are the multiplying factors of the signal carrier
amplitude.

Frequency (M-FSK) - By selecting the frequency modulation, the
Modulation Editor tool is set to M-FSK. The window allows setting
the time behavior to be assumed by the carrier signal. The samples
of the modulating signal can assume values between 0 and 110 MHz.

Phase (M-PSK) - By selecting the phase modulation, the Modulation
Editor tool is set to M-PSK. The window allows setting the phase
shifts to be assumed by the carrier signal and the time instants at