SEA 222 Operator's Manual page 23

2.5.5
2.5.6
2.5.7
2.5.8
2.~.9
the number of the desirea
11
BIN
11
location in scratchpad memory. Note
that the scratchpad memory must be programmed in the field.
SELECTING A CHANNEL BY NUMBER
Enter any desired THREE or FOUR digit channel number, followed by
the "ENT" command. Example: "4, 0, 3, ENT". Verify that the radio
has responded by examining the display which should read: "CH 403
11
•
Refer to
~
3.4 and/or your Frequency Allocation Booklet for channel Vs
frequency data.
ENTERING A RECEIVE ONLY FREQUENCY
Enter any desired FIVE or SIX digit frequency
23000.0, followed by the
11
ENT" command. Example:
ENT
11
•
This wi 11 be interpreted by the operating
frequency of 10,UOO.O KHz.
SELECTINu AN EMERGENCY CHANNEL
between 2000.0 and
11 1, 0,
o,
0, 0, 0,
system as a RECEIVE
Up to 10 emergency frequencies may be
sto~ed
in the scratchpad memory
of the SEA 222. As al ready noted, CHANNEL 0 is loaded with 2182. 0
KHz, A3H mode. Emergency channel 1 will normally be loaaed with 2182.U
KHz, A3J mode. Any of the emergency channels may be recalled from
memory by enteriny ANY SINGLE DluIT followed imrnediately by the "EMER
11
command.
ACTIVATING THE SQUELCH FUNCTION
The squelch function in the SEA 222 is activated by pressing the
"SQL
11
key on the 4x4 keypad. When the squelch system is activated, the
MOST SIGNIFICANT (leftmost) digit in the VF display will show the
letter
11
Q
11
•
Pressing the
11
SQL
11
key a second time will de-activate the
squelch function and the
11
Q
11
flag will extinguish.
The SEA 222 squelch system makes use of a software analogue of the
"voice operated" squelch used in previous SEA products. It is sensi-
tive to the changing frequency components in the human voice anrl
therefore requires no level control. A momentary tone will open the
squelch but will not hold it open. A moving tone is required to hold
the squelch open. When power is initially applied to the SEA 222, the
squelch circuitry will be OE-ACTIVATED.
ACTIVATING THE "TUNED" INDICATOR
The SECOND MOST SIGNIFICANT
di~it
in the VF display, is reserved
for the antenna coup 1 er "tuned status
11
di ':Ji t blank.
l~hen
an antenna
coupler such as the SEA 1612 is used, the "TND" line from the coui:,iler
should oe connecteu to Hie
11
Ti'iD
11
µort on the accessory pl u1;; on the SEA
7
I