SMU_dat-sw-en.pdf - 第25页

Version 08.00, Januar y 2012 Rohde & Schwarz R&S ® SMU200A Vector Signal Generator 25 In internal clock mode, a trigger event restarts the clock generation. The clock phase is then synchronous with the trigger ( …

Version 08.00, January 2012

24 Rohde & Schwarz

R&S

SMU200A Vector Signal Generator

I/Q baseband generator (R&S

SMU-B9/-B10/-B11 option) – arbitrary

waveform mode

At least one R&S

SMU-B13 baseband main module must be installed. One or two R&S

SMU-B9/-B10/-B11 options 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.

output memory

waveform length with R&S

SMU-B9

option

128 sample to 128 Msample in

one-sample steps

waveform length with R&S

SMU-B10

option

128 sample to 64 Msample in one-sample

steps

waveform length with R&S

SMU-B11

option

128 sample to 16 Msample in one-sample

steps

resolution 16 bit

loading time 10 Msample 15 s

Waveform memory

nonvolatile memory hard disk

number of segments max. 1024 segments

changeover modes GUI, remote control, external trigger

extended trigger modes same segment, next segment, next

segment seamless, sequencer

changeover time at 50 MHz clock rate

(external trigger, without clock change)

5 µs (meas.)

seamless changeover output up to end of current segment,

followed by changeover to next segment

sequencer play list length max. 96

Multisegment waveform

sequencer segment repetitions max. 65535

number of carriers max. 32

total RF bandwidth max. 80 MHz

crest factor modes maximize, minimize, off

signal period modes longest file, shortest file, user (max. 1 s)

single carrier gain –80 dB to 0 dB

single carrier start phase 0° to 360°

Multicarrier waveform

single carrier delay 0 s to 1 s

clock rate 400 Hz to 100 MHz

resolution 0.001 Hz

operating mode internal, external

Clock generation

frequency uncertainty (internal) < 5 × 10

−

× clock rate +

uncertainty of reference frequency

The sample rate of the waveform is automatically interpolated to the internal 100 MHz

data rate.

bandwidth

clock rate = 100 MHz (no interpolation),

roll-off to –0.1 dB

40 MHz

Interpolation

clock rate  100 MHz, drop to

−0.1 dB 0.31 × clock rate

The frequency offset can be used to shift the center frequency of the wanted baseband

signal. The restrictions caused by the modulation bandwidth apply.

range −40 MHz to +40 MHz

resolution 0.01 Hz

Frequency offset

frequency uncertainty < 5 × 10

− 10 × frequency offset +

reference frequency error

Version 08.00, January 2012

Rohde & Schwarz R&S

SMU200A Vector Signal Generator 25

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

number 4

level LVTTL

operating modes unchanged, restart, pulse, pattern, ratio

marker delay

setting range 0 sample to (waveform length − 1) sample

setting range without recalculation 0 sample to 2000 sample

resolution of setting 0.001 sample

Marker outputs

setting uncertainty < 10 ns

Operation with R&S

WinIQSIM2™: As of version 1.00, the software supports I/Q data download and control of the

R&S

SMU-B9/-B10/-B11 options.

Version 08.00, January 2012

26 Rohde & Schwarz

R&S

SMU200A Vector Signal Generator

I/Q baseband generator (R&S

SMU-B9/-B10/-B11 option) – realtime operation

At least one R&S

SMU-B13 baseband main module must be installed. One or two R&S

SMU-B9/-B10/-B11 options 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.

ASK

modulation index 0 % to 100 %

resolution 0.1 %

FSK 2FSK, 4FSK, MSK

deviation 0.1 to 1.5 × f

sym

maximum 10 MHz

resolution < 0.1 Hz

setting uncertainty < 0.5 %

variable FSK 4FSK, 8FSK, 16FSK

deviations –1.5 × f

sym

to +1.5 × f

sym

maximum 10 MHz

resolution < 0.1 Hz

PSK BPSK, QPSK, QPSK 45° offset, OQPSK,

π/4-QPSK, π/2-DBPSK, π/4-DQPSK,

π/8-D8PSK, 8PSK, 8PSK EDGE

Types of modulation

QAM 16QAM, 32QAM, 64QAM, 256QAM,

1024QAM

Coding Not all coding methods can be used with

every type of modulation.

off, differential, diff. phase,

diff. + Gray, Gray, GSM, NADC, PDC,

PHS, TETRA, APCO25 (PSK), PWT,

TFTS, INMARSAT, VDL, EDGE,

APCO25(FSK), ICO, CDMA2000

WCDMA

Any filter can be used with any type of modulation. The bandwidth of the modulation

signal is max. 25 MHz; the signal is clipped if the bandwidth is exceeded.

cosine, root cosine

filter parameter α 0.05 to 1.00

Gaussian

filter parameter B × T 0.15 to 2.50

cdmaOne, cdmaOne + equalizer

cdmaOne 705 kHz,

cdmaOne 705 kHz + equalizer

CDMA2000

APCO25 C4FM

rectangular

split phase

filter parameter B × T 0.15 to 2.5

Baseband filter

resolution of filter parameter 0.01

If an external clock is used, the applied data rate may deviate from the set clock rate by

±2 %. The external clock can be used for internal and external data.

operating mode internal, external

setting range

ASK, PSK, QAM 400 Hz to 25 MHz

FSK 400 Hz to 15 MHz

resolution 0.001 Hz

frequency uncertainty (internal)

< 5 × 10

–14

× symbol rate + reference

frequency uncertainty

external clock symbol, K × symbol, bit clock

clock divider K 1 to 64

Symbol rate

external clock rate max. 100 MHz

CDMA2000

is a registered trademark of the Telecommunications Industry Association (TIA - USA).