JRC JLN-900 - Invalid;Unavailable Information; Incorrect;Missing NMEA Messages; External DIM; Remote DIM Message

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continuously. To avoid this, the EL lamp is normally off and will be activated when
needed as soon as any push button is pressed and will stay on for 2 minutes after last
button operation.
3.5 Invalid/unavailable information
Depending on the NMEA formats invalid data can be indicated by certain status
characters or by missing (NULL) data fields. In this case the corresponding display
field will be unlit or indicate “---“. In some cases, it will also force the display window
to another presentation mode.
3.6 Incorrect/missing NMEA messages
If syntactically correct NMEA messages are not received within an approximate time
frame of 10 seconds the Display will display NO NMEA in the MODE WINDOW and
Err in upper SPEED WINDOW(S).
For NWW-85 Docking Display ERR will be displayed in the SPEED WINDOW 3
(lower) only.
This condition shall always be seen as an interruption in NMEA sentence messaging
and reason should be investigated.
E.g. this means that if a speed display receives properly formatted depth data only (or
any other correct NMEA sentence) it will not show NO NMEA and will continue
decoding and treat certain input data as invalid, except for the depth data, thus will
show “---“ in SPEED WINDOW(S) and continue showing local distance counter(s) in
MODE WINDOW. “---“ shall be seen as invalid data contained in a properly formatted
NMEA sentence and not an NMEA sentence error.
3.7 External Dim
External dimming is possible by using a dimmer switch or two external push buttons,
or a toggle switch, connected between terminals 7-9 (Ext Dim-) and 8-9 (Ext Dim+).
The inputs are normally in a High state and an activation of a push button/switch will
force the input Low.
3.8 Remote Dim message
All Display versions have the feature of receiving and processing the remote $PSALR
message transmitted from another Display. When this is done the receiving Display
changes its brightness level to the same intensity as on the message transmitting
Display. (See 6. Set-up of Display).
3.9 200 p/NM speed output pulses
All Display versions are able to convert the received speed value to 200 pulses/NM on
the output. The output can provide +5VDC, maximum 35mA.
A menu setting is used to choose function of the output. (See 6. Set-up of Display)
If potential free relay contact is needed the Display can be equipped with an Extension
Board containing relays and needs to be ordered separately.
(See Accessories and 6. Set-up of Display)