User Manual

Page 26 of 28
Document Reference Phalcon NT, Issue 9 and Date 07/04/2020
THIS IS THE PROPERTY OF PHAROS MARINE AUTOMATIC POWER LIMITED. DISCLOSURE OR REPRODUCTION IS FORBIDDEN
UNLESS AUTHORISED
Three of the boxes contain durations in minutes and seconds that can be edited, whilst a fourth box allows a Pulse
Count threshold to be set. Their specific functions are described as follows:
 The transponder listens for radar pulses for up to the time entered in the Listen box.
 If the total number of pulses received in this time is not greater than the parameter entered in the Pulse
Count box, then the transponder:
o Enters the left hand Sleep box where it waits in its low power consumption mode until the duration
entered in that box is exceeded.
o Restarts the process by entering the Listen box.
 If the total number of pulses received in this time is greater than the parameter entered in the Pulse Count
box, then the transponder:
o Fully powers up
o Measures the pulses in the RF environment
o Calculates the appropriate responses
o Sends interlaced responses for the selected number of sweeps for each emitter detected
o Enters the right hand Sleep box where it waits in its low power consumption mode until the duration
entered in that box is exceeded.
o Restarts the process by entering the Listen box.
Power Consumption
As can be seen from the flow chart on the Configuration GUI, the transponder runs through one of two loops.
The choice of loop depends on whether the number of pulses received during the Listen period exceeds the
figure entered in the Pulse Count box. When measuring the RF environment in order to calculate and send a
response, more power is consumed by the transponder than if it is simply monitoring a benign RF environment.
Consequently, a mean Power Consumption figure is given for each of the loops. When adjusting the Sleep and
Listen times, the power consumption figures are updated to reflect the new duty cycle.
Please note: These are indicative estimates only and not measured values.
Saving the Settings
The settings are automatically Saved to the transponder’s non-volatile memory as each parameter is changed.
An unsaved parameter is displayed in italic, which will change to non-italic when the transponder has accepted
the command.
Note that if a mismatch occurs between the transponder’s settings and those held by the GUI, then the GUI will
display an italicized setting. In this case, assuming the communication between the PC and the transponder is
correctly connected, then simply selecting the desired setting for the parameter should produce a non-italicized
response.
Once the transponder has been configured, it is recommended that the following procedure is performed:
 Disconnect the power supply from the transponder.
 Close the Configuration GUI.
 Re-launch the Configuration GUI.