SMU_dat-sw-en.pdf - 第28页

Version 08.00, Januar y 2012 28 Rohde & Schwarz R&S ® SMU200A Vector Signal Generator number 4 level LVTT L operating modes control list, restart, pulse, pattern, rati o marker delay (in sample) setting range 0 t…

Version 08.00, January 2012

Rohde & Schwarz R&S

SMU200A Vector Signal Generator 27

The frequency offset can be used to shift the center frequency of the modulation signal

in the baseband. The restrictions caused by the modulation bandwidth apply.

setting range −40 MHz to +40 MHz

resolution 0.01 Hz

Frequency offset

frequency uncertainty < 5 × 10

− 10 × frequency offset +

reference frequency error

internal

All 0, All 1

PRBS

sequence length 9, 11, 15, 16, 20, 21, 23

pattern

length 1 bit to 64 bit

data lists

R&S

SMU-B9 output memory 8 bit to 4 Gbit

R&S

SMU-B10 output memory 8 bit to 2 Gbit

R&S

SMU-B11 output memory 8 bit to 512 Mbit

nonvolatile memory hard disk

external

In the case of serial transmission, the symbol strobe marks the LSB of the symbol, and

the maximum symbol rate is limited by the data rate of the interface.

serial

word width 1 bit to 10 bit

bit rate max. 60 MHz

parallel

word width 1 bit to 10 bit

Data sources

symbol rate max. 25 MHz

In internal clock mode, a trigger event restarts the clock generation. The clock phase is

then synchronous with the trigger (with a certain timing uncertainty).

In external clock mode, the trigger event is synchronized to the symbol clock.

operating mode internal, external

modes auto, retrig, armed auto, armed retrig

setting uncertainty for clock phase related

to trigger in internal clock mode

< 18 ns

external trigger delay

setting range 0 sample to (2

– 1) sample

resolution

internal clock mode 0.01 sample

external clock mode 1 sample

setting uncertainty < 5 ns

external trigger inhibit

setting range 0 sample to (2

– 1) sample

resolution 1 sample

external trigger pulse width > 15 ns

Triggering

external trigger frequency < 0.02 × sample rate

Version 08.00, January 2012

28 Rohde & Schwarz

R&S

SMU200A Vector Signal Generator

number 4

level LVTTL

operating modes control list, restart, pulse, pattern, ratio

marker delay (in sample)

setting range 0 to 2

– 1

setting range without recalculation 0 to 2000

resolution of setting 0.001

Marker outputs

setting uncertainty < 10 ns

Internal or external via LEVATT input. The signal switches between nominal and

reduced level (without edge shaping). If an internal LEVATT signal is used, the

connector is used as an output.

setting range 0 dB to 60 dB

additional level error in case of reduction

up to 30 dB < 1 dB

Level reduction

up to 50 dB < 3 dB

Internal or external via BURST input. The signal triggers the beginning of a power

ramp. The positive edge starts power ramping from blank to full level, the negative edge

ramping in the opposite direction from full level to blanking. If an internal BURST GATE

signal is applied, the connector is used as an output.

operating range max. 5 MHz

rise/fall time

setting range 0.5 symbol to 16 symbol

resolution 0.1 symbol

Burst

ramp shape cosine, linear

The input impedance and trigger threshold can be set separately for the trigger and the

clock/data inputs.

input impedance 1 k, 50 

trigger threshold

setting range 0.00 V to 2.50 V

Trigger/clock/data inputs

resolution 0.01 V

Clock/data outputs level LVTTL

Version 08.00, January 2012

Rohde & Schwarz R&S

SMU200A Vector Signal Generator 29

modulation, filter, symbol rate and coding in line with standard

Predefined settings

standards Bluetooth

, DECT, ETC, GSM,

GSM EDGE, NADC, PDC, PHS, TETRA,

WCDMA 3GPP, TD-SCDMA,

CDMA2000

Forward,

CDMA2000

Reverse, Worldspace

Modulation errors

deviation 0.2 to 0.7 × symbol rate

Gaussian filter with B × T = 0.2 to 0.7

symbol rate up to 2 MHz < 1.2 %, 0.25 % (typ.)

Deviation error with 2FSK, 4FSK

symbol rate up to 10 MHz 0.75 % (typ.)

Gaussian filter with B × T = 0.2 to 0.7

bit rate up to 2 MHz < 0.4°, 0.15° (typ.)

Phase error with MSK

bit rate up to 10 MHz 0.3° (typ.)

cosine, root cosine filter with α = 0.2 to 0.7

symbol rate up to 5 MHz < 0.8 %, 0.2 % (typ.)

EVM with QPSK, OQPSK, π/4-DQPSK,

8PSK, 16QAM, 32QAM, 64QAM

symbol rate up to 20 MHz 0.7 % (typ.)

Measured EVM versus symbol rate.

The Bluetooth

word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such marks by Rohde & Schwarz is

under license.