16
14.3 Continued
CAUTION NOTE: If the unit is operated with the squelch "open", automatic
frequency scanning will not operate normally. This is because the unit
interprets the detected receiver noise as a valid received signal and "locks
on" the noise.
14.4 FREQUENCY
ENTRY
To enter a new frequency the user will press the "C" Key and the Frequency
display will blank. At this time the new frequency can be entered by using
the numeric keys. The HT870 is capable of interpreting short hand entries of
frequencies by assuming the 1 of the 100 MHz and the trailing zero's if
desired. This means that a minimum of 3 numeric entries are required for
simple frequency entries. i.e:
228 "set" would be entered as 122.800
2282 "set" would be entered as 122.825
If the leading 1 digit is used, the 6 digit entry format should be used for
frequency.
Frequency entries can be cleared if a mistake is made by striking the "C" Key;
The frequency entry sequence can be terminated by striking the "C" Key while
the frequency display is blank, at which time the frequency being used will be
re-displayed.
14.5 FREQUENCY ASSIGNMENTS TO MEMORY
Ten pre-programmable COM or NAV frequencies may be stored in the HT870's
memory. These memory locations are identified on the Keyboard as letters M0
through M9.
When the battery pack is first installed, the microprocessor automatically
pre-programs locations M1 to M9 to 121.500 MHz, and location M0 to 136.975
MHz.
NOTE: Location M0 is special in that the frequency stored here determines the
upper Freq Mode scanning limit when scanning.
14.5.1
PROGRAMMING OF LOCATIONS M0 TO M9
The following sequence illustrates memory programming:
1.
Clear the display of the letter "E" or "M" if one is present. To
clear an "E", depress any key. To clear an "M", depress "D" Key.
