SMW200A_specs_en_3606-8037-22_v2700.pdf - 第42页

Version 27.00, October 2024 42 Rohde & Schwar z R&S ® SMW200A Vec tor Signal Generator Differential analog I/Q output s ( R&S ® SMW-K16 option) This option can be installed once if the instrument is equipped …

Version 27.00, October 2024

Rohde & Schwarz R&S

SMW200A Vector Signal Generator 41

Standard baseband characteristics

Standard baseband is not available for instruments equipped with R&S

SMW-B1044O, R&S

SMW-B2044O, R&S

SMW-B1056O or

R&S

SMW-B1067O frequency options.

Internal baseband characteristics

(R&S

SMW-B13 or R&S

SMW-B13T option)

The R&S

SMW-B13 option provides one I/Q path to the RF section (to RF path A) as well as one analog I/Q output (i.e. one I and one

Q output connector). The R&S

SMW-B13T option provides two I/Q paths to the RF section (if two RF paths are installed) as well as

two analog I/Q outputs. With two RF paths, R&S

SMW-B13T is required.

Either R&S

SMW-B13 or R&S

SMW-B13T must be installed on the instrument.

R&S

SMW-B13 and R&S

SMW-B13T cannot be installed in instruments equipped with R&S

SMW-B1044O, R&S

SMW-B2044O,

R&S

SMW-B1056O or R&S

SMW-B1067O frequency options.

D/A converter

Data rate

200 MHz

Resolution

16 bit

Sample rate

800 MHz (internal interpolation · 4)

Aliasing filter

with amplitude, group delay and S

correction

Bandwidth, rolloff to –0.1 dB

80 MHz

SFDR (excluding harmonics)

up to 10 MHz

< –80 dBc

up to 80 MHz

< –73 dBc

I/Q impairments (digital baseband)

These impairments are set in the digital baseband section of the R&S

SMW200A. They

act on the I/Q signal sent to the I/Q modulator/RF section, as well as on the I/Q signals

at the analog or digital I/Q outputs (of the respective path).

Carrier leakage

Setting range

–10 % to +10 %

Setting resolution

0.01 %

I  Q (imbalance)

Setting range

–1 dB to +1 dB

Setting resolution

0.001 dB

Quadrature offset

Setting range

–10° to +10°

Setting resolution

0.01°

Analog I/Q outputs (R&S

SMW-B13 or R&S

SMW-B13T option)

Number of I/Q outputs

with R&S

SMW-B13 option

with R&S

SMW-B13T option

Output impedance

50 Ω

Output voltage

EMF (output voltage depends on set

modulation signal)

1 V (V

)

Offset

EMF

< 1 mV

Frequency response

at R

= 50 Ω

Magnitude

up to 10 MHz

0.02 dB (meas.)

up to 80 MHz

0.03 dB (meas.)

I/Q balance

at R

= 50 Ω

Magnitude

up to 10 MHz

0.01 dB (meas.)

up to 80 MHz

0.02 dB (meas.)

Spectral purity

at R

= 50 Ω

SFDR (sine wave)

up to 2 MHz

> 70 dB

up to 20 MHz

60 dB (meas.)

Wideband noise

10 MHz sine wave at 1 MHz offset

–155 dBc (typ.)

"Optimize internal I/Q impairments for RF output" switched off.

Value applies after 1 hour warm-up time and recalibration for 4 hours of operation and temperature variations of less than +5 °C.

Version 27.00, October 2024

42 Rohde & Schwarz R&S

SMW200A Vector Signal Generator

Differential analog I/Q outputs (R&S

SMW-K16 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 option, differential analog I/Q outputs can be used either on signal path A or B with one R&S

SMW-K16 option. For

differential analog I/Q outputs to be used on signal paths A and B simultaneously, two R&S

SMW-K16 must be installed.

Output impedance

Single-ended

50 Ω

Differential

100 Ω

Output voltage (V

out

)

output voltage depends on set modulation signal

Single-ended

EMF

0.02 V to 2 V (V

)

Resolution

1 mV

Differential

EMF

0.04 V to 4 V (V

)

Resolution

2 mV

Bias voltage (V

bias

)

Single-ended

EMF

–4 V to (+4 V – V

out

)

Differential

EMF

(–4 V + V

out

/ 2 + V

offset

/ 2) to

(+4 V – V

out

/ 2 – V

offset

/ 2)

Resolution

2 mV

Uncertainty

1 % + 4 mV

Offset voltage (V

offset

)

Differential

EMF

(–4 V + V

out

/ 2 + V

bias

/ 2) to

(+4 V – V

out

/ 2 – V

bias

/ 2)

Resolution

0.1 mV

Uncertainty

1 % + 0.1 % · bias voltage + 1 mV

Differential signal balance

at R

= 50 Ω, output voltage > 0.5 V (V

)

Magnitude

up to 10 MHz

< 0.2 dB, 0.05 dB (meas.)

up to 80 MHz

0.2 dB (meas.)

Frequency response

at R

= 50 Ω, output voltage > 0.5 V

)

Magnitude

up to 10 MHz

0.02 dB (meas.)

up to 80 MHz

0.03 dB (meas.)

"Optimize internal I/Q impairments for RF output" switched off.

Version 27.00, October 2024

Rohde & Schwarz R&S

SMW200A Vector Signal Generator 43

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 CMW500 wideband radio communication tester in

fading applications).

Digital baseband outputs: At least one R&S

SMW-K18 option must be installed. 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 option, digital baseband outputs can

be used either on signal path A or B with one R&S

SMW-K18 option. For digital baseband outputs to be used on signal paths A and B

simultaneously, two R&S

SMW-K18 must be installed. Furthermore, to enable two or more digital baseband outputs in MIMO modes,

two R&S

SMW-K18 must be installed.

Signal outputs

analog and digital, digital only

with 2 × R&S

SMW-K18 installed

analog and digital, digital only, digital only

multiplexed

Digital only

The streams are output via the digital I/Q outputs only; analog I/Q outputs are not

available. External modulation signals can be output via the RF outputs (I/Q modulation

mode: external wideband I/Q).

Note: System configurations with more than 4 streams are not available in this mode.

with R&S

SMW-K551 installed

The instrument runs at reduced speed

depending on the device connected to the

digital I/Q output (slow I/Q).

Digital only multiplexed

The streams are output via BBMM1 and BBMM2 in multiplexed mode, i.e. up to 4

streams are output via a single digital output. Analog I/Q outputs are not available.

External modulation signals can be output via the RF outputs (I/Q modulation mode:

external wideband I/Q).

Note: All system configurations available on the instrument are available in this mode.

with R&S

SMW-K551 installed

The instrument runs at reduced speed

depending on the device connected to the

digital I/Q output (slow I/Q).

Analog and digital

The instrument runs in regular operating mode, both analog and digital outputs are

available, slow I/Q is not possible.

Number of digital outputs

according to selected system configuration

(see table below)

Number of streams per digital output

digital only

digital only multiplexed

1 to 4

Bandwidth

general

according to selected system configuration

(see section Multichannel, MIMO, fading

and noise, specifications for

R&S

SMW-K74, -K75, -K76 options)

4 streams mapped to one digital output

40 MHz

The following table gives an overview of which software and hardware options are required for which digital I/Q connectivity:

Minimum required R&S

SMW200A

options

Digital I/Q inputs

Digital I/Q outputs

R&S

SMW-B13 + 1 × R&S

SMW-K18

–

R&S

SMW-B13T + 2 × R&S

SMW-K18

–

1 × R&S

SMW-B10

–

1 × R&S

SMW-B10 + R&S

SMW-B13 +

1 × R&S

SMW-K18

1 × R&S

SMW-B10 + R&S

SMW-B13T +

2 × R&S

SMW-K18

2 × R&S

SMW-B10

–

2 × R&S

SMW-B10 + R&S

SMW-B13 +

1 × R&S

SMW-K18

2 × R&S

SMW-B10 + R&S

SMW-B13T +

2 × R&S

SMW-K18