Atec Rohde-Schwarz-SMJ100A - Manual (Page 17)

Version 05.00, December 2007 R&S ® SMJ100A Vector Signal Generator 17
Digital baseband output (R&S ® SMJ-B18 option)
The R&S ® SMJ-B18 option makes digital I/Q signals available on the rear panel of the instrument. The digital I/Q output can be used
for the lossless connection of the R&S ® SMJ100A to the digital I/Q input of other Rohde & Schwarz instruments (e.g. R&S ® AMU200A
baseband signal generator and fading simulator).
Interface standard in line with Rohde & Schwarz TVR290,
I/Q data and control signals, data and
interface clock
level LVDS
connector 26-pin MDR
data rate 30 MHz to 100 MHz with 1 MHz resolution,
81.6 MHz
I/Q sample rate
With source ‘user-defined’, the sample rate must be entered via the parameter ‘sample
rate’, no I/Q data clock being necessary. With source ‘digital I/Q out’ or ‘digital I/Q in’,
the sample rate will be estimated on the basis of the applied I/Q data clock.
source user-defined, digital I/Q out, digital I/Q in
sample rate 400 Hz to 100 MHz
max. sample rate limited by actual
interface data rate
resolution (user-defined) 0.001 Hz
frequency uncertainty (user-defined) < 5 × 10 –14
I/Q data resolution 18 bit
logic format two's complement
physical signal level
setting range 0 to –60 dBFS
resolution 0.01 dBFS
bandwidth
sample rate = 100 MHz (no
interpolation, user-defined)
40 MHz
sample rate <100 MHz (interpolation) 0.31 × sample rate
Control signals markers 4
data valid valid samples marked in data stream