SMW200A_specs_en_3606-8037-22_v2700.pdf - 第67页

Version 27.00, October 2024 Rohde & Schwar z R&S ® SMW200A Vec tor Signal Generator 67 Digital Doherty ( R& S ® SMW -K546 optio n) The Digital Dohe rty option only ap plies to instru ments equipped wi th two …

Version 27.00, October 2024

66 Rohde & Schwarz R&S

SMW200A Vector Signal Generator

Envelope tracking (R&S

SMW-K540 option)

With this option, the analog I/Q outputs can be used to generate an analog signal corresponding to the envelope of the I/Q signal to

test envelope tracking modulators.

This option can be installed once if the instrument is equipped with the R&S

SMW-B13 or R&S

SMW-B13XT option. If the instrument

is equipped with the R&S

SMW-B13T option, envelope tracking can be used either on signal path A or B with one R&S

SMW-K540

option. For envelope tracking to be used on signal paths A and B simultaneously, two R&S

SMW-K540 and one R&S

SMW-B13T

must be installed.

Instruments equipped with the R&S

SMW-B13 or R&S

SMW-B13T option: For each R&S

SMW-K540 option to be installed, an

R&S

SMW-K16 option must be installed, and the instrument must be equipped with at least one standard baseband generator

(R&S

SMW-B10 option).

Instruments equipped with the R&S

SMW-B13XT option: For R&S

SMW-K540 option to be installed, the R&S

SMW-K17 option must

be installed, and the instrument must be equipped with at least one wideband baseband generator (R&S

SMW-B9 option).

General

Envelope voltage adaptation

auto normalized, auto power, manual

Output type

single-ended, differential

Bias voltage

see section Differential analog I/Q outputs or Wideband differential analog I/Q outputs

Offset voltage

see section Differential analog I/Q outputs or Wideband differential analog I/Q outputs

Envelope to RF delay

Setting range

–1 µs to +1 µs

Setting resolution

1 ps

Shaping

off, linear, from table, polynomial,

detroughing

Envelope voltage adaptation modes: auto normalized and auto power

Power amplifier input power P

Setting range

–145.00 dB to +30.00 dB

Setting resolution

0.01 dB

Power amplifier supply voltage V

= envelope voltage · DC modulator gain + V

CC, Offset

DC modulator gain

–20.00 dB to +20.00 dB

Power amplifier offset voltage V

CC,

Offset

0 V to 30 V

Envelope voltage adaptation mode: manual

Pregain

Setting range

–20.00 dB to 0.00 dB

Setting resolution

0.01 dB

Postgain

Setting range

–3.00 dB to +20.00 dB

Setting resolution

0.01 dB

Clipping level

upper and lower limit can be set

separately

0 % to 100 %

Maximum output voltage

see Output voltage in section Differential analog I/Q outputs

AM/AM, AM/PM predistortion (R&S

SMW-K541 option)

Instruments with wideband baseband (R&S

SMW-B13XT):

Each R&S

SMW-K541 option to be installed requires a wideband baseband generator (R&S

SMW-B9 option) and an RF path. If the

instrument is equipped with two baseband generators and two RF paths, predistortion can be used either on signal path A or B with

one R&S

SMW-K541 option. To allow AM/AM, AM/PM predistortion to be used on signal paths A and B simultaneously, two

R&S

SMW-K541 must be installed; furthermore, the instrument must be equipped with two R&S

SMW-B9 options and two RF paths,

i.e. an R&S

SMW-B2xx frequency option for path B must be installed.

Instruments with standard baseband (R&S

SMW-B13/-B13T):

Each R&S

SMW-K541 option to be installed requires a standard baseband generator (R&S

SMW-B10 option) and an RF path.

If the instrument is equipped with two baseband generators and two RF paths, predistortion can be used either on signal

path A or B with one R&S

SMW-K541 option. To allow AM/AM, AM/PM predistortion to be used on signal paths A and B

simultaneously, two R&S

SMW-K541 must be installed; furthermore, the instrument must be equipped with two R&S

SMW-B10

options, the R&S

SMW-B13T option and two RF paths, i.e. an R&S

SMW-B2xx frequency option for path B must be installed.

State

on/off

Maximum input power (PEP

max.)

Setting range

–145.00 dB to +30.00 dB

Setting resolution

0.01 dB

Shaping

polynomial, from table

Version 27.00, October 2024

Rohde & Schwarz R&S

SMW200A Vector Signal Generator 67

Digital Doherty (R&S

SMW-K546 option)

The Digital Doherty option only applies to instruments equipped with two RF paths and two baseband generators. Two

R&S

SMW-K541 options and the R&S

SMW-B90 option (phase coherence) must be installed as prerequisite.

State

on/off

Maximum input power (PEP

max.)

Setting range

–145.00 dB to +30.00 dB

Setting resolution

0.01 dB

Shaping

polynomial, from table, classic Doherty

User-defined frequency response correction (R&S

SMW-K544 option)

This option can be installed once if the instrument is equipped with the R&S

SMW-B13 option. If the instrument is equipped with the

R&S

SMW-B13T or R&S

SMW-B13XT option, user-defined frequency response correction can be used either on signal path A or B

with one R&S

SMW-K544 option. For user-defined frequency response correction to be used on signal paths A and B simultaneously,

two R&S

SMW-K544 must be installed.

State

on/off

Scattering parameters

File format

*.s<n>p (e.g. *.s2p)

Maximum number of points

16384

Number of cascadable datasets

up to 10

Additional frequency response

File format

*.fres, *.ucor

Number of files

up to 5

Absolute level correction at center

frequency

based on S-parameter data

on/off

Minimum compensation bandwidth

with R&S

SMW-B13/-B13T options

8 MHz

with R&S

SMW-B13XT option

100 MHz

Automated RF port alignment (R&S

SMW-K545 option)

Instruments with wideband baseband (R&S

SMW-B13XT):

For each installed RF path, R&S

SMW-B9, R&S

SMW-K61 and R&S

SMW-K544 must be installed as prerequisite. Furthermore, the

instrument must be equipped with the R&S

SMW-B90 option.

Instruments with standard baseband (R&S

SMW-B13/-B13T):

For each installed RF path, R&S

SMW-B10, R&S

SMW-K61 and R&S

SMW-K544 must be installed as prerequisite. Furthermore, the

instrument must be equipped with the R&S

SMW-B90 option.

The option cannot be installed if an R&S

SMW-B1044O, R&S

SMW-B2044O, R&S

SMW-B1056O or R&S

SMW-B1067O option

is installed.

To run this option a setup should be defined and generated using the R&S

RFPAL software. At least two signal paths should be

provided. In case of a setup with multiple instruments, an instrument is designated as primary instrument and should be used to

control the option.

State

on/off

Align

aligned, not aligned

Setup file

setup file including alignment data is

generated by R&S

RFPAL

*.rfsa

Additional S-parameter files

File format

*.s<n>p (e.g. *.s2p)

Maximum number of points

16384

Number of cascadable datasets

recommended ≤ 2

up to 10

Version 27.00, October 2024

68 Rohde & Schwarz R&S

SMW200A Vector Signal Generator

Crest factor reduction (R&S

SMW-K548 option)

Each R&S

SMW-K548 option requires a standard baseband generator (R&S

SMW-B10 option) or a wideband baseband generator

(R&S

SMW-B9 option). If two baseband generators are installed, crest factor reduction can be applied either on path A or B with one

R&S

SMW-K548 option. For crest factor reduction to be applied on paths A and B simultaneously, two R&S

SMW-K548 must be

installed.

Crest factor reduction can be applied to any waveform loaded in the arbitrary waveform generator.

State

on/off

Algorithm

clipping and filtering

Desired crest factor delta

–20 dB to 0 dB

Maximum iterations

1 to 10

Filter mode “simple”

Signal bandwidth

0 Hz to input file sample rate

Channel spacing

0 Hz to input file sample rate

Filter mode “enhanced”

Passband frequency

0 Hz to ½ of input file sample rate

Stopband frequency

0 Hz to ½ of input file sample rate

Maximum filter order

21 to 300

Slow I/Q (R&S

SMW-K551 option)

In slow I/Q mode, the generated signal’s clock rate can be reduced (e.g. a 20 MHz LTE signal is generated with a clock rate of

240 kHz instead of the original 30.72 MHz). This feature can be used to run tests on hardware emulation platforms not yet capable of

full-speed signal processing. The signal and fading characteristics are comparable to those of a system running at full speed. The

actual clock rate of the generated signal is controlled by the device connected to the digital I/Q output connectors of the

R&S

SMW200A.

R&S

SMW-K551 on instruments with wideband baseband (R&S

SMW-B9, R&S

SMW-B13XT)

At least one R&S

SMW-B9 wideband baseband generator option and one R&S

SMW-K19 digital baseband output for wideband

baseband option must be installed.

Note:

Only available for system configuration mode: advanced and signal outputs: digital only (HS).

All digital I/Q outputs need to run at the same clock rate.

The minimum clock rate is limited by the external controlling device only.

The R&S

SMW200A can handle varying clock rates.

With activated slow I/Q mode, marker signals are only available via the digital I/Q interface, and not via USER or T/M/C connectors.

With activated slow I/Q mode, no digital baseband inputs are available.

R&S

SMW-K551 on instruments with standard baseband (R&S

SMW-B10, R&S

SMW-B13/-B13T)

At least one R&S

SMW-B10 standard baseband generator option and one R&S

SMW-K18 digital baseband output option must be

installed.

Note:

All digital I/Q outputs need to run at the same clock rate.

The minimum clock rate is limited by the external controlling device only.

The R&S

SMW200A can handle varying clock rates.

In digital only/digital only multiplexed mode, marker signals are only available via the digital I/Q interface, and not via USER or T/M/C

connectors.

In digital only/digital only multiplexed mode with activated slow I/Q, no digital baseband inputs are available.