User's Manual

PTRL-LCD & RXRL-LCD
ELETTRONICA
17 / 36
User Manual
Rev. 2.3 - 26/06/19
From this menu the user can set the deviation display mode, he can switch on
or inhibit the power erogation of the transmitter and he can modify the attention
threshold.
In order to intervene on one of the three keys, select the corresponding line with
the “UP” and “DOWN” buttons and then press and keep the ENTER button pressed
until the order is accepted. In this way the Pwr setting will go from On to Off or
viceversa and the Mod setting will go from “X1” to “X10” or viceversa.
In “X10” mode the indication of the instantaneous deviation is multiplied by 10, this
is why the hachured indicator on the predefined menu coincides with the 7,5 kHz
value instead of 75 kHz. This visualization mode is useful when the user wants to
have low deviation levels displayed, for instance when they are provoked by the
pilot tone or the subcarriers.
As indicated in the introduction, the transmitter offers the possibiliy to the user to set
the attention threshold. This latter is compared to the level of one of the functioning
parameters of the unit. The result of the comparison is available on the telemetry
connector, and can be read on the display as “O” (which means open, that is to
say the result is wrong) or “C” (which means closes, therefore the result is true).
The threshold that can be setted (Power Good) refers to the transmitted power
level.
The threshold is expressed in percentage of the full scale of the considered
size.
The full-scale of the monitored size of the attention threshold for the PTRL-LCD
is:
• Forward Power 20 W
In order to change the values of the attention thresholds, the following procedure
should be followed:
• Select the line that should be modified (with the ’UP’ and ’DOWN’ buttons)
• Press the ENTER button
• Modify the value of the threshold (’UP’ and ’DOWN’ buttons)
• Press the ENTER button
In this example, the alarm threshold is:
• PwG 18 W (90% x 20 W)
5.4.2 Pwr menu (Pwr)
This view shows to the user the measurements corresponding to the power
erogation of the exciter:
• Forward Power (Fwd )
• Reflected Power (Rfl)