Comtech EF Data CSAT-6070 - Manual (Page 68)

50 Watt C-Band Transceiver Revision 0
Remote Control MN/CSAT607050.IOM
A.2.1.2 A
DDRESS
Up to 9999 devices can be uniquely addressed. In
EIA-
232 and
EIA-
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
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 is own
address.
A.2.1.3 I
NSTRUCTION
C
ODE
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).
A.2.1.4 I
NSTRUCTION
C
ODE
Q
UALIFIER
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.
For example, in a message from master to slave, ‘UAT?’ would mean return
the current value of the transmit attenuation.
A-4