Q29. Would Disconnecting Or Short-Circuiting Antenna Break Transceiver Unit; Q30. "Dsc-5" Indication Appears After A Self-Test With Dmc-5. Is This Okay; Q31. Please Tell Me About Where To Install The Antennas; Q32. What Is The Min. Horizontal Length Between Vhf Antennas - Furuno FM-8800D Service Manual

Q29. Would disconnecting or short-circuiting antenna break Transceiver
unit?
Transceiver unit: PA, No problem.
When R-VSWR was detected to be over designated voltage, FM-8800S/D
automatically reduces PA output to keep it within its designated output.

Q30. "DSC-5" indication appears after a self-test with DMC-5. Is this okay?

DMC-5 displays DSC-5 when FM-8800 does not respond to CAID command
from DMC during a self-test.
Note; In Russian Ver, DMC-5 is not connectable.

Q31. Please tell me about where to install the antennas.

In order to avoid interference of signals, it would be advisable to install No.1
VHF antenna and No.1 CH70 WR antenna in Radar mast's yard, No.2 VHF
antenna and No.2 CH70 WR antenna in Compass deck.
Q32. What is the min. horizontal length between VHF Antennas? See Q37.
If possible, install then 10 m apart from each other but make sure keep they are
at least 5 m apart.

Q33. Please tell me about where to install the VHF.

Install No.1 VHF on the starboard side and run a wire for both Wing MIC from
there. Also, it would be advisable to install a Remote Handset where you operate
a Radar.

Q34. Does a VHF Rack-consol have a type?

Yes it does. A VHF Rack consol type is called RC-8800 that consists of the main
unit, printer (PP-8800), IF-8800, a handset and a hanger. Its three dimensional
size is 330 (width) x 500 ( length) x 190 ( depth ).

Q35. Please tell me about RS-485.

RS-485 is one of the serial communication specifications standardized by EIA
(Electronic Industries Association) and is of a higher standard than that of
RS-422. RS-485 has a higher compatibility as well. While RS-232C is only
allowed for one-on-one standardized connection and RS-422 is for
one-on-several (multi-drop connection) connection, RS-485 is compatible with a
bus-shaped multi-point connection and allows for the maximum of 32
connections. The rest of RS-485 specifications are based upon RS-422 and the
maximum cable length is 1.2 km and the maximum communication speed is 10
Mbps.
9-6
Chapter 9. Q & A
See page. 5-14.
See Q37.