beautypg.com

A.4.3 i, A.4.4 i – Comtech EF Data MBT-4000B User Manual

Page 40

background image

Multi-Band Transceiver System

Revision 0

Remote Command

MN/MBT4000B.IOM

A–4

The format of the response will be:

>0412A1/MUT={CR}{LF}

Sub-device addresses cannot be changed.

IMPORTANT

The controller sends a packet with the address of a target - the destination of
the packet. When the target responds, the address used is the same
address, to indicate to the controller the source of the packet. The controller
does not have its own address.

A.4.3 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. This aids in the
readability of the message, should it be displayed in its raw ASCII form. Upper case and lower
case alphabetic characters may be used (A-Z, and a-z).

A.4.4 I

NSTRUCTION

C

ODE

Q

UALIFIER

This single character further qualifies the preceding instruction code.

Code Qualifiers obey the following rules:

1.

From Controller-to-Target, the only permitted values are:
= (ASCII code 61)
? (ASCII code 63)

They have these meanings:

The ‘=’ code (controller to target) 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 controller to target, MUT=1 would mean ‘enable the
mute function’.

The ‘?’ code (controller to target) is used as the query operator, and is used to indicate
that the target should return the current value of the parameter defined by the preceding
byte.

For example, in a message from controller to target, MUT? would mean ‘return the
current state of the mute function’