Atec RohdeSchwarz-SMW200A - Manual (Page 23)

Version 01.02, September 2013
Rohde & Schwarz R&S ® SMW200A Vector Signal Generator 23
Digital baseband inputs/outputs
Depending on the installed software and hardware options, the R&S ® SMW200A is able to receive digital baseband signals and to
output digital baseband signals. The digital I/Q input/output can be used for the lossless connection of the R&S ® SMW200A to the
digital I/Q input/output of other Rohde & Schwarz instruments (for example the R&S ® CMW500 radiocommunications tester in fading
applications).
The following table gives an overview of which software and hardware options are required for which digital I/Q connectivity:
Digital I/Q inputs Digital I/Q outputs Minimum required R&S ® SMW200A
options
– 1 R&S ® SMW-B13 + 1 × R&S ® SMW-K18
– 2 R&S ® SMW-B13T + 2 × R&S ® SMW-K18
1 – 1 × R&S ® SMW-B10
1 1 1× R&S ® SMW-B10 + R&S ® SMW-B13 +
1× R&S ® SMW-K18
1 2 1 × R&S ® SMW-B10 + R&S ® SMW-B13T +
2 × R&S ® SMW-K18
2 – 2 × R&S ® SMW-B10
2 1 2 × R&S ® SMW-B10 + R&S ® SMW-B13 +
1 × R&S ® SMW-K18
2 2 2 × R&S ® SMW-B10 + R&S ® SMW-B13T +
2 × R&S ® SMW-K18
> 2 (max. 6, depending on MIMO mode) > 2 (max. 6, depending on MIMO mode) 2 × R&S ® SMW-B10 + 4 × R&S ® SMW-B14
+ R&S ® SMW-B13T + 2 × R&S ® SMW-K18
Output parameters
Interface
Standard in line with R&S ® Digital I/Q Interface 9 ,
I/Q data and control signals, data and
interface clock
Level LVDS
Connector 26-pin MDR
I/Q sample rate With source ‘user-defined’, the sample rate must be entered via the parameter ‘sample
rate’, no I/Q data clock being necessary. With source ‘digital I/Q out’, the sample rate
will be estimated on the basis of the applied I/Q data clock.
Source user-defined, digital I/Q out
Sample rate max. sample rate depending on connected
receiving device 400 Hz to 200 MHz
Resolution (user-defined) 0.001 Hz
Frequency uncertainty (user-
defined) < (5 × 10 − 14 + relative deviation of
reference frequency) × sample rate (nom.)
I/Q data
Resolution up to 18 bit
Logic format two’s complement
Physical signal level
Setting range 0 to –60 dBFS
Resolution 0.01 dBFS
Bandwidth (RF) sample rate = 200 MHz (no interpolation,
user-defined) 160 MHz
sample rate < 200 MHz (interpolation) 0.8 × sample rate
Control signals markers 3
Input parameters
Input level peak level
Peak level
Setting range –60 dB to +3 dB, referenced to full scale
Resolution 0.01 dB
Crest factor
Setting range 0 dB to +30 dB
Resolution 0.01 dB
9 R&S ® Digital I/Q Interface is a Rohde & Schwarz internal company standard for the transmission of digital I/Q data. It is supported by a wide range of
signal generators, signal analyzers and radiocommunications testers.