Comtech EF Data XSAT-7080 - Manual (Page 41)

XSAT7080 X-Band Transceiver Revision 0
Remote Control MN/XSAT7080.IOM
4-5
For example, in a message from master to slave, ‘UAT?’ would mean return the current
value of the transmit attenuation.
2) From Slave to Master, the only permitted values are:
= (ASCII code 61)
? (ASCII code 63)
! (ASCII code 33)
* (ASCII code 42)
# (ASCII code 35)
They have these meanings:
The = code (slave to master) is used in two ways:
• First, if the master has sent a query code to a slave (for example UAT?, meaning
what’s the Transmit Attenuation?), the slave would respond with UAT=xx.xx,
where xx.xx represents the attenuation in question.
• Second, if the master sends an instruction to set a parameter to a particular value,
then, providing the value sent in the argument is valid, the slave will
acknowledge the message by replying with UAT= (with no message arguments).
The ? code (slave to master) is only used as follows:
• If the master sends an instruction to set a parameter to a particular value, then, if
the value sent in the argument is not valid, the slave will acknowledge the
message by replying with (for example) with UAT? (with no message
arguments).
• This indicates that there was an error in the message sent by the master.
The * code (slave to master) is only used as follows:
• If the master sends an instruction to set a parameter to a particular value, then, if
the value sent in the argument is valid, but the XSAT will not permit that
particular parameter to be changed at that time, the slave will acknowledge the
message by replying with (for example) with UAT* (with no message
arguments).
The ! code (slave to master) is only used as follows:
• If the master sends an instruction code which the slave does not recognise, the
slave will acknowledge the message by echoing the invalid instruction, followed
by the ! character. Example: XYZ!