SEA 222 Operator's Manual page 21

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THE 8 DIGIT ALPHANUMERIC DISPLAY: The alphanumeric VF display in
the SEA
222
is designed to provide the operator with such things as
frequency and/or channel data, operator prompting and some specialized
data outputs.
THE
4x4
KEYPAD: The
16
keyswitches provided on the SEA
222
allow
the operator to corrmunicate with the computer which controls the many
functions in the radiotelephone. In order to simplify the operation of
the SEA
222,
an "operator friendly" software package has been designed
which is used in conjunction with the alphanumeric display.
All
of the
keys and the function of each are listed below:
CH/FR: This key allows the operator to display either the channel
numt>er or the frequency of operation. Pressing this key when the
aisp-lay reads "CHAN 801" for examp-le, will cause the display to indi-
cate the receiver operating frequency which is assigned to channel
number 8Ul. Pressing the microphone push to talk switch wi
11
change
the display to read the transmitter frequency assigned to channel
number 801. Pressing the CH/FR key again will restore the channel
number.
ENT: This l<ey allows the operator to enter a previously keyed data
word into the computer. See examples in
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2.5
"OPERATING YOUR SEA
222
HF /SSB RADIOTELEPHONE".
SQL: This key activates or de-activates the voice operated SQUELCH
system in the SEA
222.
When the squelch is activated, the MOST
SIGNIFICANT digit in the display will contain the letter "Q". l.lhen the
squelch is de-activated, this display digit will remain blank. The
operation of the SQL key will "toggle" the squelch status on and
off.
EMER: This key allows one keystroke recall of the international
aistress frequency, 2182.0 KHz. It also allows the recall of up to 9
other preprograrrmed frequencies. See
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2.5 "OPEl{ATING YOUR SEA 222
HF
I
SStj RAD l 1.JTELE PHONE.
UP and DOWN ARROWS: Tnese keys control the RECEIVER frequency in
100 Hz increments. Pressiny the UP arrow will cause the frequency to
move UP in
100
Hz increments while pressing tne
UUWN
arrow reverses the
direction of tuning.
Clarity tuniny range is limited to ± 200 Hz
on programflled channe"ls, while
"Rx ONLY"
channels have unlimitea clarity
tuning ranye.
NUMBER KEYS 0 THROUGH 9: These keys al low the operator to enter
the required numerical data into the computer.
~ote
that it is neces-
sary to understand the OiJeratins system in the computer in order to
in-celli9ent1_v enter data. See
',i
2.5 "0PtRA1ING YOUR SEA 222 HF/SSH
RADIOTELEPHU~:E"
for details.
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