Research Concepts RC2000A - Manual (Page 77)

RC2000A Dual Axis Antenna Controller Appendix E Communications Protocol 77
(polarization sub-field). See byte 32 of the device status poll
reply for more information on the internal polarization position
representations for the different types of polarization control
devices. The polarization position in the polarization sub-field
must be right justified and left padded with zeroes. The second 5
characters of the sat_name/position field must contain '00000'.
For example, if the sat_name/position field contains '0050000000'
the polarization control device is commanded to adjust the
polarization to a position of 500.
The command contains 16 bytes. Here is the format;
byte 0 : STX
byte 1 : A where A is the RC2000 address
byte 2 : 32h the auto move command code
byte 3 polarization This field can specify 'H',
'V', ' ' (blank), or 'P'.
byte 4-13 sat_name/position
This field specifies the
satellite name or a target
azimuth and elevation or
polarization position.
byte 14 : ETX
byte 15 : checksum
The normal reply to this command will be the same as the reply to
the status poll query except that the command code field will be
'32h'. Note that if the satellite name is not found, the auto pol
system is enabled and a polarization is specified within the
command, or if a position specified in the sat_name/position
field is outside of the limits for the relevant antenna axis a NAK
reply will be sent to the host.
/* AZIMUTH/ELEVATION JOG COMMAND **
This command jogs the antenna in azimuth or elevation. The
command contains 11 bytes. Here is the format of the command;
byte 0 : STX
byte 1 : A where A is the RC2000 address
byte 2 : 33h the command code
byte 3 : direction This field can specify 'E',
'W', 'D', 'U' or 'X'. 'E'
refers to azimuth ccw, 'W' to
azimuth cw, 'D' refers to
down, and 'U' refers to up.
An 'X' specifies that the
antenna stop moving.
byte 4 : speed This field specifies the jog
speed, either 'F' (Fast) or
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