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iii
Transferring Data .......................................... 50
Receiving Data ............................................. 50
COMPUTER CONTROL........................................ 51
SETTING UP ..................................................... 51
Equipment Needed ....................................... 51
Connections ................................................. 51
COMMUNICATION PARAMETERS ................... 51
USING A TRANSVERTER ..................................... 51
AUTOMATIC ANTENNA TUNER ........................... 52
PRESETTING ................................................... 52
DRU-3A DIGITAL RECORDING UNIT
(OPTIONAL) .......................................................... 53
RECORDING MESSAGES ................................ 53
MESSAGE PLAYBACK ..................................... 53
Checking Messages ..................................... 53
Sending Messages ....................................... 54
Changing Inter-message Interval .................. 54
Changing Volume ......................................... 54
VS-3 VOICE SYNTHESIZER (OPTIONAL) ............ 55
CHAPTER 13 OPTIONAL ACCESSORIES 56
CHAPTER 14 INSTALLING OPTIONS 57
REMOVING THE BOTTOM CASE ........................ 57
DRU-3A DIGITAL RECORDING UNIT ................... 57
VS-3 VOICE SYNTHESIZER UNIT ........................ 58
YK-88C-1/ YK-88CN-1/ YK-88SN-1 FILTERS ........ 58
SO-2 TEMPERATURE-COMPENSATED CRYSTAL
OSCILLATOR (TCXO) ........................................... 59
CHAPTER 15 CONNECTING PERIPHERAL EQUIPMENT 60
COMPUTER .......................................................... 60
COMPATIBLE TRANSCEIVER .............................. 60
RTTY EQUIPMENT ............................................... 61
LINEAR AMPLIFIER .............................................. 61
ANTENNA TUNER ................................................ 61
MCP AND TNC ...................................................... 62
CHAPTER 16 MAINTENANCE 63
GENERAL INFORMATION .................................... 63
SERVICE........................................................... 63
SERVICE NOTE ................................................ 63
CLEANING ........................................................ 63
INTERNAL ADJUSTMENTS .................................. 64
REFERENCE FREQUENCY CALIBRATION ..... 64
ACCESSING THE INTERNAL FUSE................. 64
TROUBLESHOOTING........................................... 65
SPECIFICATIONS 68
APPENDIX: COM CONNECTOR PROTOCOL 70
INDEX 82
ATTENUATOR....................................................... 37
PREAMPLIFIER .................................................... 37
DSP TOOLS .......................................................... 37
CHANGING RECEIVE BANDWIDTH ................ 37
SSB/ FM/ AM Modes .................................... 37
CW/ FSK Modes ........................................... 38
BEAT CANCEL .................................................. 38
NOISE REDUCTION ......................................... 38
Changing NR1 Performance ......................... 38
Setting NR2 Time Constant........................... 38
CHAPTER 10 MEMORY FEATURES 39
MICROPROCESSOR MEMORY BACKUP............ 39
CONVENTIONAL MEMORY.................................. 39
STORING DATA IN MEMORY ........................... 39
Simplex Channels ......................................... 39
Split-Frequency Channels ............................. 40
MEMORY RECALL AND SCROLL .................... 40
Memory Recall.............................................. 40
Memory Scroll............................................... 41
Temporary Frequency Changes .................... 41
Memory-VFO Split Operation ........................ 41
MEMORY TRANSFER ...................................... 42
Memory ➡ VFO Transfer ............................. 42
Channel ➡ Channel Transfer ....................... 42
STORING FREQUENCY RANGES ................... 43
Confirming Start/End Frequencies ................ 43
Programmable VFO ...................................... 43
ERASING MEMORY CHANNELS ..................... 43
Full Reset ..................................................... 43
Memory Channel Lockout ............................. 44
QUICK MEMORY .................................................. 44
STORING INTO QUICK MEMORY .................... 44
RECALLING QUICK MEMORY ......................... 45
TEMPORARY FREQUENCY CHANGES .......... 45
QUICK MEMORY ➡ VFO TRANSFER .............. 45
CHAPTER 11 SCAN 46
PROGRAM SCAN ................................................. 46
SCAN HOLD ..................................................... 46
MEMORY SCAN ................................................... 47
ALL-CHANNEL SCAN ....................................... 47
GROUP SCAN .................................................. 47
CHAPTER 12 OPERATOR CONVENIENCES 48
MICROPROCESSOR RESET ............................... 48
INITIAL SETTINGS............................................ 48
PARTIAL RESET ............................................... 48
FULL RESET..................................................... 48
SWITCHING ANT 1/ ANT 2.................................... 48
FREQUENCY LOCK FUNCTION .......................... 48
BEEP FUNCTION.................................................. 49
DISPLAY DIMMER ................................................ 49
PROGRAM FUNCTION BUTTON ......................... 49
QUICK DATA TRANSFER ..................................... 50
SETTING UP ..................................................... 50
Equipment Needed ....................................... 50
Connections ................................................. 50
USING QUICK TRANSFER ............................... 50