Comtech EF Data CSAT-5060 - Manual (Page 201)

CSAT-5060 C-Band Transceivers Revision 1
Appendix A MN/CSAT5060.IOM
A–5
a) 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) following it.
Example:
In a message from master to slave, UAT=12.50 means set the transmit attenuation to 12.50 dB.
b) 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.
Example:
In a message from master to slave, UAT? means return the current value of the transmit attenuation.
2) From slave to master unit, the only permitted values are:
= (ASCII code 61)
? (ASCII code 63)
! (ASCII code 33)
* (ASCII code 42)
# (ASCII code 35)
They have these meanings:
a) The = code (slave to master) is used in two ways:
i) First, if the master has sent a query code to a slave (for example UAT?, meaning what is the Transmit Attenuation?), the slave would
respond with UAT=xx.xx, where xx.xx represents the attenuation in question.
ii) 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).
b) The ? code (slave to master) is only used as follows:
i) 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).
ii) This indicates that there was an error in the message sent by the master.