Motorola Ap73 Portable Radios User Manual

							Getting Started
132-Year Warranty
ËInsert the radio / battery into the charging docket.
If using the Quick Charge Desktop Charger:
Ê
Press the Quick Charge button.
ËRefer to Table 1  and 2  on pages 10 and 11 for an
estimation of the duration involved for charging the
battery pack.
ÌRemove the radio / battery from the charger when
charging is complete.
NOTEThe LED on the charger lights up continuously dur-
ing charging. For the Standard Desktop Charger, it
is red for the whole charging period. For the Quick
Charge Desktop Charger, it changes from yellow
(before charging begins) to red (during charging) to
green (when charging is completed).
CAUTIONThe Quick Charge Desktop charger runs on a 3-
hour timer which begins counting each time you
press the
Quick Chargebutton.Removing the bat-
tery or radio from the charger before the battery is
fully charged, or removing and replacing battery /
radio repeatedly during charging, and then press-
ing the
Quick Charge button again can overcharge
or damage the battery. Press theQuick Charge but-
ton only when the battery needs to be fully
charged. 
						

							Basic Operations
142-Year Warranty
Basic Operations
Turning the Radio On
¥ Rotate theOn / Off and Volume Knob (1) clock-
wise to turn the radio on.
Turning the Radio Off
¥ Rotate theOn / Off and Volume Knob (1) anti-
clockwise until a click is heard to turn the radio off.
Adjusting the Volume
¥ Rotate theOn / Off and Volume Knob (1) clock-
wise to increase your radioÕs volume level, or anti-
clockwise to decrease it.
NOTETo do an initial setting of the volume, press and
hold theMonitor Button (5) until the background
noise is heard. Continue holding theMonitor But-ton (5) while adjusting to the desired volume.
High / Low Power Output
¥ Press  to toggle between high and low power
output levels.
NOTEThe indicatorLOW lights up on theLCD Screen(18) when the radio is operating inlow power mode.
NOTEHigh power mode can improve the clarity of voice
activity in areas where signals are weak while low
power mode extends battery life.
STEPCLOW 
						

							Basic Operations
152-Year Warranty
Transmitting a Message
ÊSelect the desired channel or frequency (see
ÒMHz Mode OperationsÓ andÒMemory Mode
OperationsÓ on pages 25 and 31).
ËPress and hold theMonitor Button (5), and listen
for channel activity.
NOTEIf the selected channel is in Carrier squelch mode -
CTCSSindicator is not displayed on theLCDScreen (18), you can skip stepË.
Ì
If the channel is clear, press thePush-To-Talk
(PTT) Button (6) and speak clearly into theMicro-
phone (11) (seeÒInformation For Safe, EfÞcient
OperationÓon page 62 for more information).
NOTEUnless disabled (ÒdotÓ indicator ßashes on theLCD
Screen (18)), PTT ID tones are heard as they are
being transmitted (seeÒPTT IDÓon page 17). Youcan start your conversation when the tones end.
NOTETheTX indicator lights up on theLCD Screen (18)when thePush-To-Talk (PTT) Button (6) ispressed.
TX 
						

							Basic Operations
162-Year Warranty
IMPORTANTWhenever you transmit a message, you are using
the resources of the transmitting channel. Speaking
for long periods of time would deprive others from
using that channel.
NOTEThe maximum duration for transmission is deter-
mined by the value of theTime-Out-Timer (seeÒEditing Time Out TimerÓon page 53). Once you
reach the time limit, aÒTime-Out Timer AlertÓtoneis sounded, and the transmission is cut off.
Receiving a Message
¥ If thePush-To-Talk (PTT) Button (6)is pressed,
release it and listen for incoming messages.
NOTEMake sure the volume level is set properly, or else
you may receive a message but are unaware about
it. 
						

							Additional Operations
172-Year Warranty
Additional Operations
Display Backlight
¥ Press the Toggle Light / Enter and Parameter
Transfer Button (4) to turn on / off the backlight.
NOTETo conserve power, the backlight is programmed toautomatically turn off after 5 seconds.
NOTEPressing either thePush-To-Talk (PTT) Button (6)or theMonitor Button (5) has no effect on the back-light.
PTT ID
If programmed, the radio transmits a DTMF identiÞca-
tion code (unit ID), indicating which portable is in oper-
ation.
During a conversation, the code is normally sent only
on the initial PTT press (unless PTT ID has been dis-
abled). The ÔTXÕ indicator lights for the duration of the
PTT ID. If there is no PTT or receive activity for 7 sec-
onds, or if you change the frequency or channel (or
scan resumes), the PTT ID is once again transmitted
on the next PTT press.
¥ Press and hold  to enable / disable PTT ID.
NOTEUpon pressing , you will hear a beep. Hold the
button down until you hear a second beep, indicat-
ing that the PTT ID status has been changed.
When PTT ID is
disabled, the ÒdotÓ indicator ßasheson theLCD Screen (18). 
						

							Additional Operations
182-Year Warranty
Locking / Unlocking the RadioÕs Function
Locking the radio will disable all buttons except theToggle Light / Enter and Parameter Transfer Button (4),Monitor Button (5),Push-To-Talk (PTT) Button (6) and
. Pressing a locked button will result  being
shown on the
LCD Screen (18). To lock / unlock the
radio:
¥ Press and hold  (for about 2 seconds) until two
beeps are heard.
NOTEThelock /unlock status remains unchanged evenwhen the power is turned off.
Changing Squelch Modes
Squelch acts as a kind of Þltering system which helps
to control the amount of signals the radio receives.
ConÞguring the radio to receive only the desired sig-
nals minimizes interference from other users of the
same channel.
This radio supports
Carrier Squelch (CSQ), Coded
Squelch - Tone Private-Line (PL),Digital Private-Line
(DPL) andSignalling Squelch - Voice Selective Call
(SelCall)operations on a per channel basis.
Carrier Squelch transmission allows all radios tuned to
the selected receive channel (frequency) to hear the
conversation.
Coded Squelch transmission only allows
radio(s) having the samePL / DPL code on the
selected receive channel (frequency) to hear the con-
versation. S
ignalling Squelch transmission can only be
decoded by radios equipped with optional DTMF
Decode boards with valid
Voice Selective Call (Sel-
Call)identiÞcation code (seeÒVoice Selective Call
(Optional)Óon page 44). 
						

							Additional Operations
192-Year Warranty
NOTETo performSignalling Squelch (SelCall) operation,
the radio must be equipped with an optionalDTMFDecode board.
To temporarily override the default receive squelch
mode for the channel:
¥ Press  to change between Carrier (CSQ),
Coded (PL /DPL) and Signalling (SelCall) squelch
modes.
NOTEThe ÒCTCSSÓ indicator lights up continuously when
the radio is operating inCoded (PL / DPL) mode,
ßashes when operating inSignalling (SelCall) mode
and is not displayed when operating inCarrier(CSQ) mode.
NOTEWhen transmitting inSignalling squelch mode,PL /
DPL is transmitted (unless it is programmed to
Ô000Õ). After PTT is released, the radio automati-
cally enters into
CSQ mode for a period of time. If
there is no receive activity, the radio resumesSig-nalling squelch mode.
NOTEWhenever you switch from one channel to the other,
the default squelch mode of the new channel takes
effect.
A SIG
CTCSS 
						

							Additional Operations
202-Year Warranty
NOTEUsing this procedure in Memory mode to switch
from one squelch mode to the other, does not affect
the default squelch mode for the channel. Each
time you turn the radio off and on again, or when
you switch to another channel and back again, the
radio reverts back to its default squelch mode.
Setting Squelch Level
An open (low) squelch level sets the threshold for the
receiving signal strength to be low. This means that
the radio would receive a great variety of signals, both
weak and strong. A tighter (higher) squelch level
raises the threshold, thus Þltering weak signals and
only accepting the stronger ones. To set the squelch
level:
Ê
Press .
ËRotate the Selector Knob (2) to select the desired
squelch level.
ÌPress the Toggle Light / Enter and Parameter
Transfer Button (4) (or any other button) momen-
tarily to adopt the selected squelch level and return
to normal operating mode.
IMPORTANTThe radio automatically adopts the new squelch
level and returns to normal operation after 5 sec-
onds of inactivity.
PLBSQL 
						

							Additional Operations
212-Year Warranty
NOTEIf you reach the upper (Ô15Õ) or lower (Ô00Õ) limit of
the squelch range, the squelch level does NOT
wrap around to the opposite limit but remains
where it is.
Selecting The Receive PL / DPL Squelch Code
NOTEReceive PL / DPL squelch code selection can onlybe done in MHz mode.
There are 126 different Receive PL / DPL codes avail-
able, numbered from 001 to 126 (see
ÒReceive And
Transmit PL / DPL Code TablesÓon page 23).
NOTEReceive PL / DPL code Ô000Õ representsCarriersquelch.
Ê
Press and hold  until xxx is shown (where
xxx represents the active Receive PL / DPL code
number).
ËRotate the Selector Knob (2) to select the desired
active Receive PL / DPL code.
ÌPress the Toggle Light / Enter and Parameter
Transfer Button (4) (or any other button) momen-
tarily to adopt this Receive PL / DPL code and
return to normal operating mode.
IMPORTANTThe radio automatically adopts the new Receive PL
/ DPL code and returns to normal operation after 5
seconds of inactivity.
PLBSQL 
						

							Additional Operations
222-Year Warranty
Selecting A Transmit PL / DPL Squelch Code
There are 126 different Transmit PL / DPL codes avail-
able, numbered from 001 to 126 (seeÒReceive And
Transmit PL / DPL Code TablesÓon page 23).
NOTETransmit PL / DPL code Ô000Õ representsCarriersquelch.
Ê
Press and hold  until xxx is shown (where
xxx represents the active Receive PL / DPL code
number).
ËPress  momentarily to toggle the display to
xxx (where xxx represents the active Transmit
PL / DPL code number).
ÌRotate the Selector Knob (2) to select the desired
active Transmit PL / DPL code.
ÍPress the Toggle Light / Enter and Parameter
Transfer Button (4) (or any other button) momen-
tarily to adopt this Transmit PL / DPL code and
return to normal operating mode.
IMPORTANTThe radio automatically adopts the newTransmit PL
/ DPL code and returns to normal operation after 5
seconds of inactivity.
IMPORTANTIf the Receive PL / DPL code is programmed for
Ô000Õ, then the Receive PL / DPL (coded squelch)
mode cannot be selected. To select, the Receive
code must be changed to any code besides Ô000Õ
(see
ÒSelecting The Receive PL / DPL Squelch
CodeÓon page 21 andÒSelecting A Transmit PL /DPL Squelch CodeÓon page 22).
PLBSQL
PLBSQL