RESEARCH CONCEPTS RC2000C Manual page 97

RC2000C Az/El Tracking Antenna Controller
a a a a
- - - -
byte 36:
byte 37:
QUERY NAME COMMAND
This query command instructs the RC2000 to send back to the host computer an indexed satellite name
from the list of located satellites stored in non-volatile memory. This list is comprised of those satellites
that were saved via SETUP mode in the RC2000. A maximum of 35 entries can be in the list. This query
command contains 7 bytes and the format is;
byte 0:
byte 1:
byte 2:
bytes 3,4:
byte 5:
byte 6:
The normal response to this query command contains 19 bytes and the format is as follows;
byte 0:
byte 1:
byte 2:
bytes 3,4:
bytes 5,6:
bytes 7-16:
byte 17:
byte 18:
Note that if entry 'XX' does not exist in the list (or the list has no entries) the NAK reply will be sent back
to the host.
AUTO MOVE COMMAND
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Polarization movement is not allowed during a TRACK mode
peaking operation. If a polarization operation occurs during
peaking the peak obtained may not be reliable. If a 'go to' H or
V polarization command is received via the serial port the
controller will execute the command after the peaking
operation is completed. The reply to a go_to command will be
an ACK.
A polarization jog command that is received during a peaking
operation will not be registered and executed later. The reply
to the command will be a NAK.
a
-
the five most significant bits of the agc input level on the agc
channel specified in byte 34.
ETX
checksum
STX
A where A is the RC2000 address
35h the query name command code
'XX' where XX is the index of the satellite name being requested.
Normally this would be '01' the first time through and then
incremented until the 'YY' (YY being the last entry in the list)
satellite name is read. The maximum possible range for XX
and YY is 1 through 35.
ETX
'chksum" the checksum
ACK
A where A is the RC2000 address
35h the query name command code
'XX' where XX is the index of the satellite name being requested.
'YY' where YY is the total number of satellite names contained in
the list.
This field will contain the satellite name.
ETX
'chksum' the checksum
Appendix E Communications Protocol 89
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