OPERATION
SST-442
7
CH
ON
OFF/HOLD
VOLUME
Antenna
Vol Down/Off
On/Vol Up
Audio
Accessory
Jack
Jack Cover
Charge Jack
Speaker
Microphone
Push-to-Talk
Channel
Selector
Battery Access
Door
(Case bottom)
Battery Charger
Contacts
(Case bottom)
Fig. 2 Controls and Accessory Connectors
DESCRIPTION OF CONTROLS AND
CONNECTORS
Antenna
The flexible antenna radiates and receives radio
signals. Before using the radio, be sure the
antenna base is threaded fully into the radio’s
antenna bushing.
Use only the antenna(s) available from RITRON
for the SST-442. Do not attempt to substitute
with any other antenna.
On/Volume Up
This button switches on the radio, then increases
the volume if you continue to press.
Volume Down/Off
This button decreases the volume, then shuts off
the radio if you continue to press.
Push-To-Talk
The PTT activates the transmitter, and must be
held down while you talk into the microphone.
Release the PTT button to receive.
Channel Selector
Pressing this button selects the next channel.
When the maximum number of channels is
reached and you press this button, the radio
resets to channel 1.
Audio Accessory Jack
This jack connects speaker audio to optional
accessories, such as a remote speaker/
microphone or an earphone. For accessories
that have a two-plug connector, the smaller plug
is inserted into the charge jack.
This jack is also used to program the radio using
the optional PC programming kit.
Charge Jack
The battery may be charged through this jack
using a standard RITRON wall socket charger
cube. This jack also connects microphone audio
to the optional remote speaker/microphone.
Microphone
The microphone converts your voice into
electrical impulses, which are carried with your
broadcast to receiving radios. Hold the radio
about four inches away and talk into the
microphone while transmitting. Shouting does
not improve the listener’s reception.
Speaker
The speaker allows you to hear calls on your
channel.
Jack Cover
This rubber cover seals out dust and moisture, etc. Snap the
cover into the audio accessory and charge jack openings
when the jacks are not being used.
Battery Access (Case Bottom
)
The battery door on the case bottom may be removed to
access the battery. (Refer to the Battery Replacement section
of this manual.)
Drop-in Charger Contacts (Case Bottom
)
Two charger contacts in the bottom of the SST-442 radio case
allow the battery pack to be charged using an optional
RITRON drop-in charger (model BCC-PS.)