ECRESO FM 100/300 W, user manual– 06/2015
Page 33
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5.3.
TX/RF parameters
These parameters are available as:
Front panel *
TX PARAMETERS menu
see section 6.3.4
Serial commands
TX and CONF
see sections 7.2.3 and 7.2.4
Engi PC application
Main page
see section 8.2.2
Embedded web site
Transmitter/Main/Parameter page
see section 9.4.2
* Parameters followed by a star (*) are not available on the front panel.
MAX POWER
(TX.PWR_MAX or CONF.PWR_MAX) – read/write *
With this parameter, set the maximum power that can be configured. This can be useful when in a modular system,
the exciter power has to be within a given range for the transmitter to work properly, or when the installation
(antenna…) has its own limitation.
From 0 to 99999 W (depending on the transmitter’s power)
3 DB
(TX.3DB) – read/write
With this parameter, set the triggering threshold for the 3 dB alarm. Default value is half the transmitter’s power (also
when in auto mode).
From 0 to 9999 dB (depending on the transmitter’s power)
MAX VSWR
(TX.VSWR.MAX) – read/write
With this parameter, set the triggering threshold for the VSWR alarm. It has no bearing on the VSWR Trip parameter
described below.
From 0 to 99.9
INTERNAL REFLECTED LIMIT
(STAT.PREFMAX) – read *
This parameter indicates whether the reflected power went over the maximum limit. Depending on the configuration
of the CONF.VSWR_TRIG command, it may trigger a VSWR fault.
Off/On
VSWR TRIP
(TX.VSWRTRIP) – read/write
With this parameter, enable or disable the VSWR/reflected power safety. With a compact transmitter, in case the
VSWR is higher than 3 and the reflected power is greater than the maximum threshold (software threshold as defined
in the “Protecting the transmitter” section, chapter 2), the RF is shut off and automatically starts again. With a
modular transmitter, in case the VSWR is higher than 3, the amplifier power is set to 0 W, and again to its set value. If
the fault is still present, the cut/restart process is repeated 3 times. If the 3
rd
time, it is still present, the transmitter is
cut for good.
Off/On
RF PRESENT
(TX.RFPRESENT) – read *
This parameter indicates whether RF is present at a level superior to the threshold set by the command
TX.RFPRESENT.MIN (0 by default). When not present (status=off), no alarm is triggered.
Off/On
