Rohde and Schwarz SGS100A

B1	Reference oszillator OCXO (retrofittable only in Rohde & Schwarz service with UCS;
B106	Frequency range: 1MHz to 6GHz, CW only (not installable post factory; hardware option)
B106V	Frequency range: 1MHz to 6GHz, with vector modulation (not installable post factory,
B112	Frequency extension 12.75GHz, CW only (frequency option R&S®SGSB106 required, retrofittable only in
B26	Electronic step attenuator (retrofittable only in Rohde & Schwarz service with UCS;
B98	Special mechanics for LTXC rack adapter
DCV-2	Documentation of calibration values
DCV-ZP	Printout of DCV (additional, in combination with DCV-Option only)
K90	Phase coherent input and output (software license)