Atec RohdeSchwarz-SMW200A - Manual (Page 24)

Version 01.02, September 2013
24 Rohde & Schwarz R&S ® SMW200A Vector Signal Generator
Adjust level function automatically determines peak level and crest factor of input signal
I/Q swap I and Q signals swapped on/off
Interface
Standard in line with R&S ® Digital I/Q Interface
PAD-R 10 ,
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 in’, the sample rate will
be estimated on the basis of the applied I/Q data clock.
Source user-defined, digital I/Q in
Sample rate max. sample rate depending on connected
transmitting 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 18 bit
Logic format two’s complement
Bandwidth sample rate = 200 MHz (no interpolation,
user-defined) 160 MHz
sample rate < 200 MHz (interpolation) 0.8 × sample rate
Control signals markers 3
I/Q baseband generator (R&S ® SMW-B10 option) – arbitrary waveform mode
One or two R&S ® SMW-B10 can be installed. Their I/Q signals can be assigned a frequency offset and/or be added in the digital
domain with settable level ratio.
Waveform length 1 sample to 64 Msample in one-sample
steps
with R&S ® SMW-K511 option (memory
extension)
1 sample to 512 Msample in one-sample
steps
with R&S ® SMW-K512 option (memory
extension)
1 sample to 1 Gsample in one-sample
steps
Nonvolatile memory hard disk
Sample resolution equivalent to D/A converter 16 bit
Sample rate 400 Hz to 150 MHz
with R&S ® SMW-K522 option 400 Hz to 200 MHz
Sample frequency error internal clock < (5 × 10 − 14 + relative deviation of
reference frequency) × sample rate (nom.)
Sample clock source internal, external
Bandwidth (RF) using the maximum sample rate,
rolloff to –0.1 dB 120 MHz
using a reduced sample rate,
rolloff to –0.1 dB
(The waveform is automatically
interpolated to the internal sample rate of
150 MHz.) 0.8 × sample rate
Bandwidth (RF) with R&S ® SMW-K522
option
using the maximum sample rate,
rolloff to –0.1 dB 160 MHz
using a reduced sample rate,
rolloff to –0.1 dB
(The waveform is automatically
interpolated to the internal sample rate of
200 MHz.) 0.8 × sample rate
10 R&S ® Digital I/Q Interface PAD-R 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.