Japan Radio Co. JLR-7900, Instruction Manual

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6.5.6 Output buffer (NQA-4351)
An output buffer unit can be distributed NMEA data to external unit (Up to 12 units)
6.5.7 GPS Select Switch (Manual) (NCZ-1663)
A GPS select switch (NCZ-1663) can be connected to output buffer (NQA-4351) unit and
switched GPS units manually.
6.5.8 GPS Select Switch (Automatic) (NCZ-1537B)
A GPS select switch (NCZ-1537B) can be switched GPS units by control signal.
GPS select
Switch
NCZ-1537B
Control Signal
No1 GPS
No1 GPS Data
No2 GPS Data
No2 GPS
No1 or No2 GPS Data
Output buffer
NQA-4351
No1 GPS
No1 GPS Data
No2 GPS Data
No2 GPS
No1 or No2 GPS Data
Output buffer
NQA-4351
：
Up to 12 units
NMEA Data
GPS select
Switch
NCZ-1663
：
Up to 12 units