B&G NSPL-400 - Manual (Page 17)

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Operation | NSPL-400 User Manual
Operation
Operation of the NSPL-400 is automatic and requires no user inter-
vention. During operation the antenna splitter will share signals
received at your VHF antenna with both the AIS transceiver and the
VHF radio.
When either the AIS transceiver or VHF radio transmits, the NSPL-400
will automatically sense the transmission and route the signal to the
antenna.
If both a VHF radio and AIS transceiver are transmitting at the same
time, the NSPL-400 will give priority to the VHF radio.
Warning: It is not possible for both connected devices to
transmit simultaneously using a single VHF antenna. When
talking on the VHF radio, AIS position reports are not transmitted.
Indicator functions
The NSPL-400 includes three coloured indicators as shown in Figure
10. The state of the indicators provides information regarding the
status of the NSPL-400.
Fig. 10 Indicator lights
Indicator lights
Green Yellow Yellow
(Power) (AIS TX) (VHF TX)
Green Yellow Yellow
(Power) (AIS TX) (VHF TX)
Indicator lights
Figure 10 Indicator location on the NSPL-400 unit
The indicators provide the following functions:
• Power - this indicator is illuminated whilst the unit is powered
• TX AIS - this indicator flashes to indicate AIS transmissions
• TX VHF - this indicator flashes to indicate VHF radio transmissions
¼ Note: TX AIS and TX VHF LEDs may both illuminate when the NSPL-
400 is used with some brands of VHF radio at high output power
(25 W) setting. This is normal behavior and does not indicate a fault.
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