Edgetech 4380 MULTIBEACON, Руководство пользователя по оборудованию

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3-2 SECTION 3: SETUP & ACTIVATION
MODEL 4380 MULTIBEACON
0014296_REV_B
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Change the transponder turnaround time (005 - 250 mS).
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Change the Responder lockout time (0.5 - 20.0 seconds).
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Change the Transponder lockout time (0.5 - 20.0 seconds).
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Change the output power between high and low (delta ~ 5 dB).
3.1.2.4 Interrogation Frequencies
The 4380 series beacon uses a micro-power, multi-tap tuned circuit to discriminate interrogation pulses.
There are six predefined frequencies that can be selected from, each band being 400Hz wide.
3.1.2.5 Reply Pulses
A library of reply pulses that can be loaded into the 4380 are available from EdgeTech. The user has the
option of defining any pulse as either a Navigation or Telemetry reply. The available reply pulse waveforms
include a series of 1.5mS long CW pulses and series of 10mS long, PRN encoded pulses. PRN reply pulses
provide the user with the highest level of tracking performance, but at a higher cost in power
consumption. Both types of reply pulses are available in multiple frequencies.
To load a reply waveform the user must connect to the serial port, type the command LWNAV, go to the
FILE drop down menu and select send file, and select the waveform to be loaded.
3.1.2.6 Output Power
The reply output power of the 4380 can be reduced by 5 dB if desired. This feature is useful when working
at short ranges and/or high multipath environments.
3.1.2.7 Timed Pinger Mode
The 4380 can be configured to operate as a free running timed pinger. The repetition rate of the timed
pinger can be set from 1.0 seconds up to 499.9 seconds. When operating as a timed pinger, telemetry is
not available.
3.1.2.8 Pressure Telemetry
Pressure telemetry is a feature that can be used to track the computed depth that the beacon is operating
at. Pressure telemetry works by measuring the hydrostatic pressure on the beacon’s pressure sensor and
converting that information into a proportional time delay between the Navigation and Telemetry reply
pulses. The time delay between the two reply pulses is scaled for a 100mS delay at zero pressure, up to a
1.000 second delay at full pressure.