Rohde & Schwarz SMBV100B, User Manual

Page: 130 / 1030

Configuring the Internal Baseband Source
R&S
®
SMBV100B
128 User Manual 1178.4460.02 ─ 03
Rise Delay
Sets the offset in the rising edge of the envelope at the start of a burst, see Figure 3-3 .
A positive value delays (the envelope length decreases) and a negative value causes
an advance (the envelope length increases). The setting is expressed in symbols.
Remote command:
[:SOURce<hw>]:BB:DM:PRAMp:RDELay
on page 724
Fall Delay
Sets the offset in the falling edge of the envelope at the end of a burst, see Figure 3-3 .
A positive value delays (the envelope length increases) and a negative value causes
an advance (the envelope length decreases). The setting is expressed in symbols.
Remote command:
[:SOURce<hw>]:BB:DM:PRAMp:FDELay
on page 724
Attenuation
Determines the level by that the average signal level is attenuated during the signal
attenuation period, during the time the "Lev_Att" signal is high. See also
Figure 3-2 .
For information about the required control signal, refer to "Power Ramping and Level
Attenuation" on page 92.
Remote command:
[:SOURce<hw>]:BB:DM:PRAMp:ATTenuation
on page 724
In Baseband Only
Restricts power ramping to the baseband signal.
"Off" Level attenuation is affected via the attenuator stages in the RF sec-
tion; only the remaining part is attenuated in the baseband. The sig-
nal is issued at the RF output with the defined level values.
"On" Level attenuation is affected in the baseband only.
Note:
This setting is mandatory in the following cases:
●
When only the baseband signal is issued at the I/Q outputs
It is thus ensured that, with power ramping active, this signal is
output with the defined level values.
●
For two-path instruments, when one baseband signal is applied to
two RF paths.
Remote command:
[:SOURce<hw>]:BB:DM:PRAMp:BBONly[:STATe]
on page 724
3.5.3.7 Data List Editor
The R&S SMBV100B provides the following ways to create a data list file:
●
To use the dedicated "Data List Editor" and create a file with extension
*.dm_iqd
,
see "To create data lists manually" on page 136
●
To use the tag-oriented format and create a data list file, see "To create a data list
file using tag file format" on page 175.
Generating Custom Digital Modulated Signals