Comtech EF Data MBT-4000 Installation And Operation Manual page 47

Multi-Band Transceiver System
Remote Command
A.4 P S
ACKET
Controller-to-Target:
Start of Packet Target
Address
<
ASCII code 60
(1 character) (4 or 6
characters)
Example:
Target-to-Controller:
Start of Packet Target
Address
>
ASCII
code 62
(1 character) (4 or 6
characters)
Example:
Each of the components of the packet is now explained.
A.4.1 S O P
TART F
Controller to Target: This is the character '<' (ASCII code 60)
Target to Controller: This is the character '>' (ASCII code 62)
Because this is used to provide a reliable indication of the start of packet, these two characters
may not appear anywhere else within the body of the message.
A.4.2 A
DDRESS
Up to 9999 devices can be uniquely addressed. In both RS-232 and RS-485 applications, the
permissible range of values is 1 to 9999. It is programmed into a target unit using the remote
control port.
The BDC and BUC sub-devices may also be addressed by appending the corresponding sub-
device address. The sub-device address is 'A1' for the BUC and 'A2' for the BDC.
For example, a mute command addressed to a BUC attached to an MBT-4000 at address 0412
will be:
<0412A1/MUT=1{CR}
TRUCTURE
Address
De-limiter
/
ASCII code 47
(1 character)
<0412/MUT=1{CR}
Address
De-limiter
/
ASCII
code 47
(1 character)
>0412/MUT={CR}{LF}
ACKET
Instruction Code
Code Qualifier
= or ?
ASCII code
61 or 63
(3 characters) (1 character)
Instruction Code Qualifier
Code
=, ?, !, or *
ASCII code 61,
63, 33 or 42
(3 characters) (1 character)
A–3
Revision 3
MN/MBT4000.IOM
Optional End of Packet
Arguments
Carriage
Return
ASCII code 13
(n characters)
(1 character)
Optional End of Packet
Arguments
Carriage Return,
Line Feed
(From 0 to n ASCII code 13,10
characters) (2 characters)