57
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Ultra
Version M 22-April-2012
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Ultra
2.0 MVAT Command Set
MVAT serial command protocol is: ;
AT:[COMMAND] XX
Note:
When typing a command, do not type the brackets [ ].
Example: ;
AT:TF 50.25
Feature
Operation
Command Response
Description
MVAT
Echo, set
Example: EC0
turns echo off
Echo, query
Example: EC?
echo 1
response indicates echo is on
ECn
EC?
0 or 1
“0” turns off echo;
“1” turns echo on
Turns on/off the “Echo” feature. With Echo on, all characters
that are received by the MVAT’s RS-232 receiver are
echoed back to the sender. This is frequently useful when
diagnosing communications problems. Echo is always “off”
at power-up.
Transmission, Floating-Point Percent, set
Example: TF34.25
Sets transmission to 34.25%.
Transmission, Floating-Point Percent, query
Example: TF?
Responds with the last-set transmission, in floating
point format
TFn
TF?
xx.yy
1-6 character string
representing a floating-
point value
Parameter range is
0–100
Requires a parameter in floating-point format to set
the desired transmission percentage. The resulting
transmission is given by: transmission = parameter.
Transmission, Hexadecimal Percent, set
Example: APFF
Sets transmission to 100 percent.
Example: AP7F
Sets transmission to 50 percent
(0x7F/0xFF) = 0.5
Transmission, Hexadecimal Percent, query
Example: AP?
Displays last-set transmission, in hexadecimal
format.
APnn
AP?
0 to FF
Parameter range is 0-FF
This low resolution command is included only to allow
backward compatibility. This instruction requires a one-byte
parameter in hexadecimal format that represents the user’s
desired transmission. The resulting transmission is given
by: transmission = 100 ( parameter / 0xFF ).
Version Number, query
Example: VN
Responds 1.17, indicating the firmware version is
1.17.
VN
n.nn
Queries the MVAT firmware version number. A question
mark (?) is not required for this query; but it is still
acceptable.
