Memorex RX 1 Smart Manual de Instalação descarregar pdf (Página 76)

74 | Keypad & Display Descriptione

Echo Sounder Connected - causes the MX51x to look for one of the appropriate NMEA

0183 data sentences when set to Yes.

Data Input Port No. - Select the appropriate NMEA 0183 port that the sensor is

connected to (Port 1 or 2). Ports 3 and 4 are reserved for the Smart antenna

controls.

Offset - Input the appropriate offset for the sensor, based on the measurement you are

most interested in. If your boat draws about the same amount of water each time

you use it, you may want to put in the difference between the sensor and the

waterline height. If your boat’s draught changes from one trip to another, as would

be the case when the MX51x is used on a freight ship, you may want to put in the

difference between the sensor and the lowest point of the ship’s hull.

Shallow Alarm Active - allows you to receive an alarm if the sensor receives depth data

lower than the limit you set in Alarm Limit (below). The default setting is No.

Alarm Limit - allows you to specify at what depth you want an alarm to activate. This

alarm limit is enabled by the Shallow Alarm Active selection of Yes.

Alarm If No Data - Allows you to receive an audible and visual alarm if NMEA 0183 data

is not being received on the data port at regular intervals (typically every few

seconds). The available choices are Yes (default) and No.

Input Sentence - Specifies the NMEA 0183 data sentence to read the depth data from.

The available choices are Any (default), DPT, DBS, DBT, or DBK sentence. It is

better to specify the appropriate sentence because more than one method of

reporting depth may be available on the port.

The window in the lower portion of the screen allows you to see the depth data that is

received on the data port (Input:) and the data that is actually displayed in NAV 4 (Used

Value:).

DGPS - DGPS Conguration

This CFG menu allows you to control the built in beacon receiver in the smart antenna

unit.

DGPS Menu

DGPS Mode:

Auto - sets the smart antenna to automatically switch between DGPS or GPS modes. This

is the default setting. If DGPS corrections are being received and their age is less

than the Max Age limit, the MX51x will operate in DGPS mode (assuming you are

receiving corrections for enough satellites to operate in DGPS mode). Otherwise,

the receiver operates in GPS positioning mode.

The traffic light will be green when it is in DGPS mode.

When it drops to GPS mode, a DGPS symbol will be displayed (indicating Non

Differential GPS mode), and the yellow and green traffic light will be on.

Use this mode when maximum navigation coverage is more important than

accuracy. Reverting to GPS mode will degrade the overall navigation results, but it

is better than no navigation results at all in most circumstances.

DGPS Only - sets the smart antenna to only provide DGPS position fixes. If corrections

are being received and their age is less than the Max Age limit, the MX51x will

operate in DGPS mode (assuming there are enough corrections to operate in DGPS

mode). Otherwise, the antenna will not provide any position fix at all.

Use this mode when accuracy is more important than maximum navigation

coverage. It is recommended to set the Max Age to 30 seconds in this mode.

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Memorex RX 1 Smart Manual de Instalação Página 76

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