Technical information
Table Of Contents
- TITLE PAGE
- TABLE OF CONTENTS
- INTRODUCTION
- SECTION I
- CHARACTERISTICS OF HF SSB
- ACRONYMS AND DEFINITIONS
- REFERENCES
- HF SSB COMMUNICATIONS
- FREQUENCY
- SKYWAVE PROPAGATION - WHICH FREQUENCY TO
- WHY SINGLE SIDEBAND IS IMPORTANT IN HF
- AMPLITUDE MODULATION (AM)
- SINGLE SIDEBAND OPERATION
- SINGLE SIDEBAND (SSB)
- SUPPRESSED CARRIER VS. REDUCED CARRIER
- SIMPLEX AND SEMI-DUPLEX OPERATION
- AUTOMATIC LINK ESTABLISHMENT (ALE)
- FUNCTIONS OF HF RADIO AUTOMATION
- HOW ALE ASSURES THAT THE BEST COMMUNICA-TIONS
- CHARACTERISTICS OF HF SSB
- SECTION II
- SECTION III
- SECTION IV
- SECTION V
- SECTION VI
- SECTION VII
- ITU MARITIME RADIOTELEPHONE STATIONS
- DESCRIPTION OF SERVICES
- AT&T HIGH SEAS RADIOTELEPHONE SERVICE
- AT & T COAST STATION COVERAGE MAP
- COAST STATION COVERAGE & INFORMATION
- AIRCRAFT REGISTRATION
- OPERATING PROCEDURES FOR USING THE HIGH SEAS RADIOTELEPHONE NETWORK
- AT&T HIGH SEAS COAST STATIONS
- MOBILE MARINE RADIO, INC.
- WORLDWIDE LISTING OF PUBLIC CORRESPONDENCE STATIONS
- MARITIME RADIOTELEPHONE CHANNEL DESIGNATIONS
- SECTION VIII
- SECTION IX
- SECTION X
- SECTION XI
- SECTION XII
- SECTION XIII
SEMI-DUPLEX CHANNEL PROGRAMMING
Semi-duplex operation uses one frequency for receiving and another
for transmitting. The KCU 951 has semi-duplex capability onlyin
channelized operation.
Programming semi-duplex channels is much like programming sim-
plex or receive-only channels, except for the final step when frequen-
cies are stored.
Again, begin programming by pressing the FREQ/CHAN button “in”,
stowing the “cursor” if necessary, and activating the program mode
by pressing the PGM switch with a pointed object. The PGM annuni-
cation will appear in the display.
1. Use the smaller inner concentric knob to select the channel num-
ber to be programmed.
2. Use the MODE button to select emission mode (USB, LSB or AM).
Press the MODE button until the desired mode appears.
3. Use the outer larger concentric knob to position the flashing “cur-
sor” on each digit of the receivefrequency and use the smaller inner
knob to select the desired number in each position. Remember, set
the receive frequency first.
4. Push the STO button once and the receive frequency is entered in
electronic memory. The TX annunciation will begin to flash in the dis-
play window indicating the receive frequency is stored and you are
ready to program the transmit frequency. Refer to Figure 3-73.
5. Using the larger knob to control the “cursor” and the inner knob to
select the appropriate numbers, set the transmit frequency in the dis-
play window.
Operation
3-60
KHF 950/990 Pilots Guide
Rev. 0
Dec/96
FREQ KHZ CHANNEL
CLARIFIER
PULL
ON
SQUELCH
OFF
VOLUME
STO PGM
MODE FREQ CHAN
HF
ı
17239.1 56
USB
PGMTX
Figure 3-73 Semi-Duplex Channel Programming