Address; Instruction Code; Instruction Code Qualifier - Comtech EF Data XSAT-7080 Series Installation And Operation Manual

XSAT7080 X-Band Transceiver
Remote Control
4.2.1.2 A
DDRESS
Up to 9999 devices can be uniquely addressed. In RS-232 and RS-485 applications, the
permissible range of values is 1 to 9999. It is programmed into a slave unit using the Set Physical
Address (SPA) command.
IMPORTANT
4.2.1.3 I
NSTRUCTION
This is a three-character alphabetic sequence that identifies the subject of the message. Wherever
possible, the instruction codes have been chosen to have some significance.
For example UAT for Up Converter attenuation, UFQ for Up Converter Frequency, etc. This aids in
the readability of the message, should it be displayed in its raw ASCII form. All command are case
sensitive, only upper case alphabetic characters may be used (A-Z, ASCII codes 65 - 90).
4.2.1.4 I
NSTRUCTION
This is a single character that further qualifies the preceding instruction code.
Code Qualifiers obey the following rules:
1) From Master to Slave, the only permitted values are:
= (ASCII code 61)
? (ASCII code 63)
They have these meanings:
The = code (master to slave) is used as the assignment operator, and is used to indicate
that the parameter defined by the preceding byte should be set to the value of the
argument(s) which follow it.
For example, in a message from master to slave, UAT=12.50 would mean set the transmit
attenuation to 12.50 dB.
The ? code (master to slave) is used as the query operator, and is used to indicate that the
slave should return the current value of the parameter defined by the preceding byte.
The master sends a packet with the address of a slave - the destination of the packet.
When the slave responds, the address used is the same address, to indicate to the
master the source of the packet. The master does not have its own address.
C
ODE
C Q
ODE UALIFIER
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MN/XSAT7080.IOM