Technical data

2.3 Disable/enable key beep
The HT50 beeps every time a key is pressed to confirm opera-
tion. To disable the key beep, press and hold SQ while turning
the set on. Repeat this procedure to turn the key beep on again.
Second level functions (such as All Channel Scan, Tri-Watch,
etc.) will still be indicated by a beep, even if the key beep is
disabled.
2.4 Keypad lock
The HT50 keypad can be locked to prevent accidentally press-
ing keys while in a pocket, for example.
To lock the keypad, press and hold the Hi/Lo key. The HT50
will beep twice and any key pressed will not function – “LOCK”
will appear in the display. To disengage the keypad lock, press
and hold Hi/Lo again.
Note The PTT key will still function when the keypad lock is on,
allowing transmitting and receiving as normal.
Note This function is not available with the Axis 50 GMDSS models
(yellow case).
2.5 Removing and attaching the battery
The HT50 is supplied with a 1200mAh NiMH battery (part no.
NH12). The Axis 50 GMDSS radio has two battery options: an
850mAh NiCad (part no. NC08) or a non-rechargeable lithium
battery (part no. LTB3).
The batteries are supplied with a label across the contacts to
prevent accidental discharge while in the box. This label should
be removed before use.
To remove the battery, lift the two locking clips holding the
battery pack in place (Fig 2.4). When reattaching, ensure the
two locating pegs on the top of the battery are located into the
slots in the radio and that the two locking clips have both
engaged.
The set is fully waterproof, even with the battery removed, but it
is recommended that any moisture on the top of the battery or in
the battery compartment is wiped clear before attaching to pre-
vent the water creating a conductive path between the contacts
and reducing battery life.
Note Axis 50 batteries cannot be used with an HT50, and vice versa.
HT50/HT51/HT53 & Axis 50 GMDSS
12
E03766 Issue 3.0
Fig 2.4 - Battery pack removal