Atec RohdeSchwarz-SMW200A - Manual (Page 13)

Version 01.02, September 2013
Rohde & Schwarz R&S ® SMW200A Vector Signal Generator 13
Phase coherence (R&S ® SMW-B90 option)
The R&S ® SMW-K90 option provides phase-coherent RF outputs for the two RF paths or two or more instruments. For frequencies
above 200 MHz, the LO output and input frequency are set to the output frequency.
LO coupling modes This mode corresponds to internal
LO operation in path A and path B. A, B internal
This mode corresponds to internal
LO operation in path A, and LO of path B
is coupled to path A. A internal,
A → B coupled
This mode corresponds to external
LO operation at the LO IN connector in
path A and internal LO operation in path B. A external,
B internal
This mode corresponds to external
LO operation at the REF/LO IN connector
in path A and path B. A external,
A → B coupled
REF/LO OUT states The active LO signal of path B can be
routed to the LO OUT connector (in order
to couple two or more instruments). on/off
Input of phase coherence signal
Connector type
LO IN on rear panel SMA female
Input impedance 50 Ω (nom.)
Input level range of external LO signal 7 dBm to 13 dBm
Frequency range of external LO signal for RF setting 200 MHz < f ≤ 6 GHz 200 MHz to 6 GHz
Output of phase coherence signal
Connector type
LO OUT on rear panel SMA female
Output impedance 50 Ω (nom.)
Output level range of internal LO signal 7 dBm to 13 dBm
Frequency range of internal LO signal for RF setting 200 MHz < f ≤ 6 GHz 200 MHz to 6 GHz
Simultaneous modulation
In the same RF path.
Amplitude
modulation
Frequency
modulation Phase modulation Pulse modulation I/Q modulation
Amplitude
modulation ● ● ○ –
Frequency
modulation ● – ● ○
Phase modulation ● – ● ○
Pulse modulation ○ ● ● ●
I/Q modulation – ○ ○ ●
● = compatible, – = incompatible,
○ = compatible with limitations
For simultaneous I/Q and frequency modulation, or simultaneous I/Q and phase modulation, the instrument must be equipped with a
two-path signal routing and baseband main module (R&S
® SMW-B13T option).