SMW200A_specs_en_3606-8037-22_v2700.pdf - 第64页

Version 27.00, October 2024 64 Rohde & Schwar z R&S ® SMW200A Vec tor Signal Generator Baseband enha ncements Additive white Gaussian n oise (AWGN) (R&S ® SMW-K62 o ption) AWGN can be gene rated either on pat…

Version 27.00, October 2024

Rohde & Schwarz R&S

SMW200A Vector Signal Generator 63

Mandatory extra

40G QSFP+ to 10G SFP+ adapter

converter module

Recommended extras

• 10G SFP+ optical cable

• 10G SFP+ Ethernet network interface

card

Wideband baseband generator (R&S

SMW-B9 option) – real-time operation

(custom digital modulation)

See Digital Standards for Signal Generators specifications (PD 5213.9434.22).

Wideband baseband generator for GNSS with high dynamics

(R&S

SMW-B9F option)

This wideband baseband generator enables high dynamics with GNSS standards. For details see the GNSS simulation for

Rohde & Schwarz vector signal generators specifications (PD 3607.6896.22). Otherwise, the specifications of the wideband baseband

generator (R&S

SMW-B9 option) also apply for the R&S

SMW-B9F option. Enhancements of the R&S

SMW-B9 option and software

options that run on the R&S

SMW-B9 option also work with the R&S

SMW-B9F option.

Note that R&S

SMW-B9F and R&S

SMW-B9 cannot be mixed, i.e. only the following configurations can be installed:

• 1 × R&S

SMW-B9

• 2 × R&S

SMW-B9

• 1 × R&S

SMW-B9F

• 2 × R&S

SMW-B9F

Version 27.00, October 2024

64 Rohde & Schwarz R&S

SMW200A Vector Signal Generator

Baseband enhancements

Additive white Gaussian noise (AWGN) (R&S

SMW-K62 option)

AWGN can be generated either on path A or B with one R&S

SMW-K62 option. For AWGN to be generated on paths A and B

simultaneously, two R&S

SMW-K62 must be installed, and the R&S

SMW200A must be equipped with the R&S

SMW-B13T or

R&S

SMW-B13XT option.

Addition of an AWGN signal of settable bandwidth and settable C/N ratio or E

to a wanted signal. If the noise generator is used,

a frequency offset cannot be added to the wanted signal.

Noise

Distribution density

Gaussian, statistical, separate for I and Q

Crest factor

> 15 dB

Periodicity

> 3 · 10

C/N, E

Setting range

Depends on the set RF level.

The PEP of the sum signal (wanted signal

+ noise) must not exceed the maximum

possible PEP of the respective RF path.

–50 dB to +45 dB

Setting resolution

0.01 dB

Uncertainty

for system bandwidth = symbol rate,

symbol rate < 4 MHz,

–24 dB < C/N < 30 dB and

crest factor < 12 dB

< 0.1 dB

System bandwidth

bandwidth for determining noise power

Setting range

with R&S

SMW-B13/-B13T options

1 kHz to 160 MHz

with R&S

SMW-B13XT option

system configuration mode: standard

1 kHz to 2000 MHz

system configuration mode: advanced

1 kHz to 200 MHz

with R&S

SMW-K822 option

1 kHz to 400 MHz

with R&S

SMW-K823 option

1 kHz to 800 MHz

Setting resolution

100 Hz

Enhanced noise generation (R&S

SMW-K810 option)

Enhanced noise generation can be used either on signal path A or B with one R&S

SMW-K810 option. For enhanced noise

generation to be used on paths A and B simultaneously, two R&S

SMW-K810 must be installed. For each R&S

SMW-K810 option to

be installed, an R&S

SMW-K62 option must be installed as prerequisite.

Phase noise simulation

Phase noise

Injection

after fading

Profiles

user-defined

user

predefined PLL phase noise profiles

(simulation of typical PLL circuits)

PLL 1, PLL 2

predefined VCXO phase noise profiles

(simulation of typical oscillator circuits)

crystal 1 to 5

predefined DVB-S2 phase noise profiles,

based on EN 302307, DIRECTV

DVB-S2 P1, DVB-S2 P2, DVB-S2 D1,

DVB-S2 A1, DVB-S2 A2

predefined ATSC phase noise profiles,

based on ATSC A.74

ATSC A.74

File format

text files, editable

Graphical user interface

Entry

by curve table

Number of nodes

5 independent points

Calculation

internal

Amplitude at f

carrier

± 100 Hz

Setting range

measurement bandwidth = 1 Hz

–110.00 dBc to 0.00 dBc

Setting resolution

measurement bandwidth = 1 Hz

0.01 dB

Maximum phase angle

±180°

Density distribution function

Gaussian

Frequency response

depends on phase noise profile

System bandwidth

10 MHz

Version 27.00, October 2024

Rohde & Schwarz R&S

SMW200A Vector Signal Generator 65

Impulsive noise simulation

This function allows to add a pulsed AWGN signal to the wanted signal with settable number of pulses per frame and within settable

limits of randomly distributed pulse intervals.

Impulsive noise

AWGN signal data

see R&S

SMW-K62 option

C/I

Setting range

Depends on the set RF level.

The PEP of the sum signal (wanted signal

+ noise) must not exceed the maximum

possible PEP of the respective RF path.

–35 dB to +60 dB

Setting resolution

0.01 dB

Frame duration

0.1 ms to 1000.0 ms

Pulse duration

fixed

0.25 µs

Pulses per frame

1 to 40000

Minimum pulse interval

for pulses per frame > 1

Setting range

0.25 µs to 16 ms

Setting resolution

0.25 µs

Maximum pulse interval

for pulses per frame > 1

Setting range

0.25 µs to 16 ms

Setting resolution

0.25 µs

Distribution of pulse intervals

PRBS

Availability of phase noise and impulsive noise for different baseband configurations

Baseband main

module

Fading/baseband configuration

Phase noise

Impulsive noise

R&S

SMW-B13

standard

●

R&S

SMW-B13T

standard

●

advanced

up to 4 streams

–

●

more than 4 streams

–

R&S

SMW-B13XT

standard

●

advanced

up to 4 streams

●

more than 4 streams

●