Furuno FELCOM 250

 Contents
C-11
Chapter 11. Block Description
11.1 Communication unit: FB-2000····································································11-1
11.1.1 IF: 16P0275·························································································11-2
1. IF Transmitting Circuit·············································································11-3
2. IF Receiving Circuit·················································································11-4
3. 42V ·········································································································11-4
4. ASK (Amplitude shift keying) ··································································11-5
11.1.2 MODEM: 16P0274 ··············································································11-6
11.1.3 HUB: 16P0273·····················································································11-8
11.1.4 POWER: 16P0226·············································································11-10
1. Output Specifications············································································11-11
2. Other Specifications·············································································· 11-11
3. Adjusted Parts······················································································· 11-11
11.1.5 PANEL: 16P0227···············································································11-12
1. SIM ·······································································································11-12
2. LED·······································································································11-12
3. Reset SW ·····························································································11-12
11.1.6 Handset: FB-8000 ·············································································11-13
11.1.7 Incoming Indicator: FB-3000······························································11-14
11.2 Antenna Unit: FB-1500/1250····································································11-15
11.2.1. Overview···························································································11-15
1. The Functions for the Major module ·····················································11-15
2. Transmitting and Receiving Circuit ·······················································11-16
11.2.2 Satellite Acquire Sequence································································11-20
1. Outline of the Sequence for Capturing the Satellite······························11-21
2. Command·····························································································11-22