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2.8 Battery Level Indicator
Except when adjusting the Volume or Squelch,
the bar graph on the display shows the bat-
tery charge level (Fig 2.7). This indicates the
voltage at the battery terminals, not necessari-
ly the charge stored. Ten or nine bars indicate
a fully charged battery, three or four bars
mean the battery is almost drained.
• A more accurate indication of the battery
state will be obtained by transmitting briefly
on high power. Do not use CH16 for this
purpose.
• When using a lithium battery pack, the low
level battery indicator may flash under trans-
mit conditions. This does not necessarily
reflect the charge level remaining in the bat-
tery, as it is due to the different voltage char-
acteristics of a Lithium battery pack under
load.
2.9 HT51 Accessory Socket
The HT51 features an accessory socket (Fig
2.8) for use with fistmikes, headsets and
boom-mikes etc. The features, functionality
and operation of the HT51 are identical to the
HT50.
Only accessories made specifically for use
with the HT51 should be connected - incom-
patible accessories could damage the radio
and invalidate the warranty.
• Switch off the radio before connecting an
accessory to the socket.
Note that the HT51’s internal speaker, micro-
phone and PTT button are disabled when the
accessory is connected - these functions are
transferred to the accessory.
For details of compatible accessories available,
contact your Simrad Distributor or the Simrad
Preferred Supplier -
Atlantic Instruments
The Coach House,Trefor, Holyhead, Anglesey
Wales, LL65 1LZ,United Kingdom
Phone 44 (0) 1407 720513
Fax 44 (0) 1407 720616
E-mail charles@atlanticuk.com
Website www.atlanticuk.com
Fig 2.7 - Battery level indicator
Fig 2.8 - HT51 with accessory socket
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