5
Internal dual arbitrary
waveform generator,
Option UND
Adapt quickly to changing market
needs with a completely flexible
baseband generator. Download
waveforms that simulate complex,
non-standard or proprietary modula-
tion schemes. Replay complex wave-
forms to simulate multicarrier
CDMA and TDMA signals to easily
characterize base station power
amplifiers. Generate I/Q files from
many different application programs,
such as Omnisys, MATLAB™, and
Mathcad™, and then download
the waveform from an external
computer through GPIB or RS-232.
Description
Option UND is one of two internal
baseband generator cards for the
ESG-D and ESG-DP series. This
dual arbitrary waveform generator
provides an extremely flexible
baseband generation for the most
complex RF waveforms.
It is provided on a user-installable
card that can be added to the
B version of any existing ESG, or
any new instrument.
Available personalities
• Multicarrier, multichannel cdmaOne,
Option UN5
• Multichannel W-CDMA 1.0,
Option 100
• Multichannel cdma2000,
Option 101
Key features
High performance 14-bit digital to analog
converters (DAC)
Improve simulation and reduce
noise floor.
The state of the art 14-bit DACs
have only 25% of the quantization
error of an ordinary 12-bit arbitrary
waveform generation.
Deep 1 megasample/channel arbitrary
waveform memory
Download or store extremely long
or numerous waveforms.
Both the volatile and nonvolatile
RAM have 1 Megasample of memory
per channel. Switch between multiple
waveforms instantaneously to
minimize valuable download time
in a manufacturing environment.
Clock
generator
Digital
signal
processor
S
e
q
u
e
n
c
e
r
I RAM
1 MWord
GPIB
Main
CPU
Q RAM
1 MWord
10 MHz internal reference
1 to 20 MHz external reference
DAC
DAC
Reconstruction
filters
14
14
data
NV RAM
1MWord
NV RAM
1MWord
addresses
Q
Out
MHz
8 MHz
250 kHz
2.5 MHz
I
Out
MHz
8 MHz
250 kHz
2.5 MHz
High-performance internal dual arbitrary waveform generator block diagram.
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