Configuring the Internal Baseband Source
R&S
®
SMBV100B
182
User Manual 1178.4460.02 ─ 03
Manual operation:
See
{EMPTYTAG-Length: #EmptySequence}
(mandatory in automatically generated one and multi-segment waveforms)
This tag is empty, i.e. contains no data, and is used as placeholder.
Setting parameters:
Length
An ASCII integer value that specifies the number of bytes in the
EMPTYTAG
, i.e. defines the number of bytes from the colon
:
to
the end brace
}
Note:
If you change the content of a waveform file, change also
the
{EMPTYTAG-Length}
value. For example, if you add a tag
or add bytes to a tag, reduce the length by the number of newly
introduced bytes.
EmptySequence
An empty sequence containing blanks only. The number of used
blanks is calculated as the difference between the hex
addresses of the
{WAVEFORM}
tag and the hash sign
#
in the
{EMPTYTAG}
.
The
{WAVEFORM}
tag always starts at hex address #4000.
Example:
{TYPE:SMU-WV, 837236424}
{COPYRIGHT:2003 Rohde&Schwarz SMU}
{DATE:2012-07-11;14:38:01}
{SAMPLES:80000}
{CLOCK:8666666.666666666}
{VECTOR MAX:1.000000038569158}
{LEVEL OFFS:3.333553817875577e-07,0}
{MARKER LIST 1:0:1;1:0;1249:0}
{MARKER LIST 2:0:1;1:0;1249:0}
{MARKER LIST 3:0:1;1:0;1249:0}
{MARKER LIST 4:0:1;1:0;1249:0}
{EMPTYTAG-15947:# ...}
{WAVEFORM-320017:#IQIQIQ...}
The example waveform file contains 436 (0x1b4) bytes before
the
#
sign in the
EMPTYTAG
; the hex address of the
#
sign is
0x1b5
. The
{WAVEFORM}
starts at
0x4000
. The
EMPTYTAG
con-
tains
15946
blanks and has a length of (15946+1) bytes.
Usage:
Setting only
{LEVEL OFFS: RMSOffset_dB,PeakOffset_dB}
(recommended for waveforms)
The tag determines the level of the ARB signal in the waveform file. The offset levels
define the offset of RMS and peak value relative to the 16-bit full scale modulation
(-32767 to + 32767) = 0 dB.
Using the Arbitrary Waveform Generator (ARB)
