VOR/ILS Analyzer EVS200
0796.1800.02
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48
Chapter 3: Operation
Command FA3
command
function
FA3
<Fast measuring on>
Activating the Fast measurement mode
The command FA3 switches on the fast measurement mode. The command FA3 performs the con-
tinuous measurement and output of the RF level, Bearing, AM30, AM9960, FM-deviation, FM-
Index. The 33 to 66-ms measurement interval consists of DSP analysis, DSP data transmission to
the host processor and conversion of the DSP raw measurement value into dBm, Bearing °, AM %
and FM Hz . The measurement values output is performed in this mode as interrupt operation via
RS232 interface.
In this Fast-Mode (FA3) a measurement value set will only be transmitted to the PC if it is demanded
by a short command (1 ASCII-Character). The response from the EVS200 is performed without a
longer delay within about 15 to 20 ms between measurement value demand and measurement
value transmission. The stated RS-232-transmission times are related to 19.200 Baud.
The measurement values can be read in and output as a text file corresponding to the terminal pro-
gram.
The baud rate must be set to 19200 baud in the Setup of the VOR/ILS Analyzer EVS200.
It must be attended the acceptance of the data transfering rate by the terminal pro-
gram.
The measurement can be stopped through the command FA0 (refer to Command FA0)
or <CR >.
Example:
command from the controller
response of the VOR/ILS Analyzer EVS200
input:
e.g. A
Demand for measurement
values output:
all ASCII characters without:
CR (0Dh), LF (0Ah), # (23h), @ (40h)
With the command FA3 the echo
mode is automatically switched
OFF.
output form: (RF level <CR >, Bearing <CR >,
AM30 <CR >, AM 9960 <CR >),
FM-deviation<CR >,
FM-Index <CR >),
output form as FA2
example:
-412 <CR > (RF level),
35506 <CR > (Bearing),
304 <CR > (AM30),
302 <CR > (AM9960),
4800 <CR > (FM-deviation),
160 <CR > (FM-Index),
Command FA0
command
function
FA0
<fast DDM measuring off>
deactivating the fast DDM measurement
The command FA0 switches off the fast DDM measurement.
Example:
command from the controller
response of the VOR/ILS Analyzer EVS200
input:
FA0 <CR>
fa0 <CR>
READY <CR/LF>
READY <CR/LF>
