Rohde and Schwarz CTS55

B1	OCXO reference oscillator aging: 2 x 10-7/year
C3	Three years of depot calibration coverage based on the R&S recommended calibration interval - includes test data. The first calibration is included with product delivery with 2 additional depot calibration(s).
C5	Five years of calibration coverage based on the R&S recommended calibration interval - includes test data. The first calibration is included with product delivery with 4 additional depot calibration(s).
DCV-1	Documentation of calibration values
DKD	CTS/CBT DKD (ISO17025) calibration incl. ISO 9000 calibration (order only with device)
K4	SW GPRS signaling for CTS30/55/65
K6	Remote control via RS232 for CTS55/60/65 with Windows appl. software
K7	GSM module test for CTS30/55/65 before June'98 +CTS-U7
R3	Three years of depot repair coverage, including re-calibration if necessary to complete the repair. First year of repair coverage is provided by the 12-month new product warranty.
R5	Five years of depot repair coverage, including re-calibration if necessary to complete the repair. First year of repair coverage is provided by the 12-month new product warranty.