ECRESO FM 5kW / 10kW, user manual
–
11/2021
Page 57
WorldCast Systems SAS - 20 avenue Neil Armstrong - 33700 Mérignac (Bordeaux Métropole) FRANCE
+33 (0)5 57 928 928
–
www.worldcastsystems.com
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contact@worldcastsystems.com
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 transmit
ter’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
SFN
(CONF.SFN.STATE)
–
read/write *
Enable or disable the SFN function with this parameter. The SFN (Single Frequency Network)
is a broadcast network
where several transmitters simultaneously transmit the same signal over the same frequency channel. It
uses the
10 MHz input to synchronize the RF subcarrier and the modulation. Before enabling SFN, it is essential to conduct a
study to determine its feasibility; if feasible, SNF requires a proper installation. Use AES inputs and adjust the
transmitter power accordingly.
Off/On
SFN DELAY
(CONF.SFN.DELAY)
–
read/write *
With this parameter set the SFN delay. The SFN delay makes it possible to compensate audio transmit time in the
network. This delay has to be set in the field depending on readings computed in the coverage area. It is set in 1.25 µs
increments. The actual delay is then read and an offset between the set delay and the read delay leads to an SFN
alarm (loss of synchronization).
From 0 to 5000000.00 µs
