SATINPUT STI SI
Gets and sets the current tuner input for the NTC7044 tuner.
Form:
  Command Handler: SYSD
  SATINPUT|STI|SI [TUNER INDEX]
  Possible values for [TUNER INDEX]:
  Terse       Verbose        Description
   0           RF1              Tuner RF1 (was previously known as A)
   1           RF2              Tuner RF2 (was previously known as B)
Response:
  SATINPUT RESPONSE
   Verbose- "OK\r\n" to acknowledge receipt of command, or
          "ERROR- [Description]\r\n" if error, ending command
   Terse-   "0\r\n" to acknowledge receipt of command, or
          "[NON-ZERO NUMERIC VALUE]\r\n" if error, ending command
   "\r\n" concludes modify responses (empty line)
Examples:
To get the current setting:
*.SYSD SATINPUT
OK
INPUT=RF1
To set the input to RF2:
*.SYSD STI RF2
OK
Notes:
This command is intended for the NTC7044 tuner only and will return a generic
error message for any other tuner.