Ritron, Transceiver, models:

DTX Plus Series	Specifications
DTX- 60 Series	Operating Manual
DTX-165-0	Maintenance And Operating Manual
DTX-Ls Series	Specifications
DTXM-460-0BN6I-M-FIPS	User Manual
DTXM-465-0BN6I-M	User Manual
DTXM-NXDN Series	Maintenance & Operating Manual
RT-453	Maintenance And Operating Manual
RadioNexus	Solution Manual
SPX-200	Maintenance/Repair/Operating Manual