Furuno FELCOM 12, Service Manual

Page: 72 / 118

6-4
GPS Status: GPS signal status
CST: Cold Start
ACQ: Acquired; Almanac data acquired
IMP: Impossible; Cannot receive GPS signal
INT: Interrupted; Object interfering with reception of GPS
signal
ALM: Receiving the almanac
2D, 3D: Position-fixing method by 2 or 3 dimensions
DCE memory: Memory not is used.
BBER: Bulletin Board Error Rate (%)
C/N*: Check of circuit status with LES, receiving circuit in Antenna
Unit, RF CONV Board, TX/RX IF Board and CPU Board
(DEMOD section). OK appears when figure is higher than 31.
Send Level*: TX level check. At transmission, OK appears when figure is
higher than 123. At reception OK appears when figure is lower
than 32.
RX IF AGC Level*: Check the RX circuit in the Antenna Unit and the RF CONV
Board or TX/RX IF Board in the Communication Unit. OK
appears when figure is higher than 80.
REF Offset Freq*: Operating normally if SYNC lamp on Communication Unit
lights during synchronizing. If it does not light check RX
Synthesizer or REF OSC on the TX/RX IF Board. OK appears
when figure is lower than 150.
Synthe 1st Local*: Check of local oscillator on RF CONV Board.
RX 2nd local*: Check of RX 2nd local oscillator on RF CON Board.
Antenna Power Supply*: NG appears for discontinuity or short in cable.
Water Temperature: Water temperature
Water Current
Direction : Tidal current direction
Speed: Tidal current speed
Depth: Depth of water
(*1): See "Analysis of NG display" beginning on the next page.