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
NOTE: Although normally disabled, the KCU 951 also has the capa-
bility of being internally enabled by aircraft wiring so that dial-like
“borrow/carry” tuning will occur. For example, when so enabled, if two
existing frequency digits are 89 with the “cursor” on the 9, a further
clockwise rotation of the knob will change the digits to 90 rather than
to 80, as is normally accomplished. This feature is desirable if the
system is to be used for “search” or “continuous” tuning (100 Hz or
greater steps, e.g. amateur radio operation). Working from right to
left or left to right, position the flashing “cursor” on each digit with the
larger knob and select the new number with the inner smaller knob.
Once all digits are changed, twist the larger knob one more click right
or left, as appropriate, and the “cursor” will disappear (stow). To
recall the flashing “cursor” simply twist the larger knob in either direc-
tion until the flashing “cursor” is positioned on the digit to be changed.
4. Tune the antenna coupler: Press the mic button momentarily to
initiate antenna tuning. During the tuning process the TX annuncia-
tion will flash and the frequency numbers will blank. When the TX
stops flashing and the frequency reappears, the antenna tuning cycle
is complete and you are ready to transmit on the selected frequency.
Direct tuning always provides simplex operation-you transmit and
receive on the same frequency.
NOTE: Always key the mic button after selecting a new frequency to
initiate antenna tuning. Otherwise you may experience poor recep-
tion or miss an important call.
CHANNEL OPERATION AND PROGRAMMING 1
The 99 pilot programmable channels available with the KCU 951
Control Display Unit can be easily programmed by the pilot on the
ground or in the air. Each of the 99 channels can be assigned a sep-
arate frequency or frequencies (semi-duplex operation) and an oper-
ating mode (USB, LSB or AM). This information is stored in non-
volatile memory and can then be recalled by the pilot using the
selected channel number. Three types of channels can be pro-
grammed.
Operation
3-55
KHF 950/990 Pilots Guide
Rev. 0
Dec/96