The DVR+ has discrete Power ON and OFF codes as documented in Channel Master's Support pages for the DVR+ CM-7500GB16 at http://support.channelmaster.com/hc/en-us/articles/200657770-Does-the-DVR-Remote-have-Discrete-On-Off-code-
2 Key codes are reserved for discrete power ON and OFF.
0x37 = ON
0x38 = OFF
Thank you. I did see those in my search of the Channel Master web site. Now if I find all the other codes. It would have been so much nicer if CM had provided them or better yet, made the commands available via IP.