14
13.3 Continued
*
Note the auto functions require a received signal i.e. the
TO/FR flag must be displayed in order to be utilized. If any
attempt is made to use Auto Function without a received signal the
unit will display the previous displayed OBS value when the set
key is struck.
C Key:
This key is used in conjunction with frequency. If the C
Key is struck the Frequency display will blank and inserting
a valid 2, 3, 4, 5, or 6 digit number and striking the set
key will channel the radio to the new frequency. For ease
of operation the HT870 will accept a truncated version of
the desired frequency. For example, 228 "set" would be read
as 122.800 and 128 "set" would be read as 112.800, thereby
reducing the workload. If any time during entry a mistake
is made, it can be corrected by striking the C Key and
clearing the display. If the user wishes to cancel the
operation and keep his original frequency all that is
necessary is to strike the "set" key when the frequency
display is blank.
12.
Keyboard Lock Switch: This switch is used to lock out inadvertent
key strokes that might happen in the normal handling or use of the
unit. When activated the 16 key keypad is disabled.
13.
Push to Talk Switch (PTT): This switch is used to activate the
transmit function of the radio. If the unit is channeled to a
communication frequency the transmit and receive functions are on
the same frequency. If the unit is channeled to a navigation
frequency when the PTT switch is pressed the unit will transmit on
the duplex frequency 122.100 MHZ for FSS Communications.
14.
LCD Illuminate Switch: This switch is used to light the LCD
display for viewing in the dark. The light will remain lit as
long as the switch is depressed.
14.1 INTRODUCTION TO OPERATING PROCEDURES
The HT870 may be utilized as a 760 channel COM Transceiver or a 200 channel
NAV Receiver/Converter. The unit may be operated in either the Memory or
Frequency Modes.