ADI AT-600 User manual

“>
ADI
Communications
AT-600
VHF/UHF FM DUAL BANDER
USER'S MANUAL

TABLE OF CONTENTS
re
ee
ee
1 Preparation
1-1 Features.
1-2 Accessories...
1-3 Getting Acquainted .....
1-4 Manual Conventions ~----.-- en
1-5 Using the AT-600's Set Menu
1-6 A Quick Look at The Display
2 Basic Operations ...............
2-1 Turning Power On/Off -.....
2-2 Adjusting Volume and Squelch -...
2-3 Using SQL OFF . ents
2-4 Selecting Main Band «=...
2-5 Selecting Frequency ~~.
2-6 Transmitting
2-7 Inhibiting Transmissions -
2-8 Selecting Output Power -..- :
2-9 Changing Frequency Step ~ :
2-10 Changing pees Step in 100KHz, 1MHz
or 10MHz
2-11 Using Key Lock -- 2.00. sibace i sucsteche
2-12 Using Selector Lock and Key Lock .-... .
2-13 Single Band Operation . siete ypeByccitd
2-14 Using Display Light
2-15 Testing Display Window ~~
14
15
15
1S
16
2-16 Resetting the AT-600 .....
3 Memory Function sees
3-1 Storing Frequencies into Memory ve LF
3-2 Recalling Memory eee wf
3-3 Clearing a Memory -- ETS
3-4 Changing Stored Memories 2. 18
3-5 Protecting MEMOPYy os ene nie IQ
3-6 Storing/Changing Channel ID foreseen [QD
3-7 Call Channel - sentetin
3-8 Changing Call Frequeticyn
3-9 Changing CALL Frequency Teraporariy 21
4 Scanning shes Faonanb toner cta tien ere sD
4-1 1MHz Sean 2 cots thet peak 22
4-2 Band Scan oe . sieisioscosrtbonaurcestiss 22
4-3 Program SGa oes eee eeetseiinnensennnee 22
4-4 Memory Scan sistent se ctnsceennremeenss BY
4-5 Specific Memory Scan... eee vee 3
4-6 Memory Block Scan»... 24
4-7 Scan Sika Memory Under Memory I Block
San eh8 2262.3" samantha ares .
4-8 Tone Squelch Frequency Scan 25
4-9 Selecting Scan Resume Type -- 2 25
5 Dual Watch ste ; cepataaie 26
5-1 Memory MOO Dual Watch... 26

TABLE OF CONTENTS
et
ed
5-2 Any Memory Mxx Dual Watch. -
5-3 Call Channel Dual Watch -......
5-4 Memory Sequence Dual Watch
5-5 Changing Dual Watch Speed ---
6 Operating Through Repeaters
6-1 Setting Offest Direction ~~~
6-2 Changing Offset Frequency
6-3 Reversing Transmission and Reception
FREQUENCY 00. ..o- corte
6-4 Cross-Band Repeater Operations
6-5 Setting 2-Second Cross-Band Repeater
Delay..... iiuemisuetats
7 DTMF Features sseeeanee
7-1 Manually “faneentinig B DTMF Code «eee 32
7-2 Storing DTMF Sequences +
7-3 Clearing DTIMF Memory
7-4 Transmit DTMF Sequence from Memory
7-5 Changing DTMF Transmitting Speen .
7-6 Using DTMF Decode Function -
7-7 DTMF Paging ~ reaesanIS
7-8 Setting Personal or Group Code..-....
7-9 Paging from Memory -. Se
7-10 Setting Page Squelch --
7-11 Setting Page Delay
7-12 Changing Page Rings
7-18 Using DTMF Code Squeich
8 CTCSS Features .. ee
8-1 Using Tone Encode -
8-2 Using Tone Squelch
8-3 Setting CTCSS Tone
9
Additional
Features
.
40
9-1
Setting
AM
Reception
Mode
.
40
9-2
Setting
Auto
Power
Off
rrr
40
9-3 Setting Reception Attenuation( ATT )
9-4 Setting Auto AM Mode «>
9-5 Setting Auto Power On Function -
9-6 Turning Entry eee Tone On/Off
9-7 Cloning «-
9-8 Full Duplex Gpsiaianis or
9-9 Setting 1KHz Digit Option-
9-10 Setting Power On Message ~~
9-11 Battery Save.
9-12 Selecting Internal/External Speaker.
9-13 Setting Time-Out Timer ( T.O.T )
9-14 Battery Voltage Reading -
9-15 1750Hz Tone Burst --
10 Specifications —-

PREPARATION
1 Preparation
Precautions:
1. To prevent permanent power loss, do not charge the
battery pack in an area where the temperature is
below about 5°C (40°F).
2. If you install an outdoor antenna, please follow all
cautions and warnings that come with the antenna.
3. Do not transmit with high output power for too long
periods. The transceiver maybe overheat.
4. The supply voltage must be between 5.5V and
16.0V to avoid damaging the transceiver.
5. Never charge the battery pack with a charger other
than the one supplied to avoid permanently
damaging the battery pack.
6. Rechargeable NiCd battery can be a hazard to the
environment. It must be recycled or disposed
of safely at the end of the battery's useful life.
7. Do not place the transceiver near the heating
appliances or expose it to long periods of direct
sunlight.
8. Do not place the transceiver in excessively humid or
dusty areas.
9. Do not disassemble the transceiver and modify it.
Changes or modifications to this equipment not
expressly approved by ADI could void the user's
authorization to operate this equipment.
This equipment complies with part 15 of the FCC
rules. Operation is subject to the following two
conditions: (1) This equipment may not cause
harmful interference, and (2) this equipment must
accept any interference received, including
interference that may cause undesired operation.

a
1-1 Features
The AT-600 has the following great features:
@ Dual Band Operation—Capable of simultaneous
transmit and receive on both 2-meter VHF and
70-cm UHF bands and receives in the ranges
130.0-172.0MHz, 350.0- 399.995MHz,
400.0-470.0MHz, and 900.0-985.0MHz.
@ Low battery alert To alert the AT-600's user to
recharge the battery pack when battery icon
appears on the display. If the user continues to use
the battery after some time, the AT-600 will
automatically shut down 80 seconds after flashing
"Battery Low" appears.
@ Large backlit dot matrix LCD with illuminated keypad
—All operating information for both VHF and UHF
bands are clearly displayed, and allows you to turn
on the lamp so you can see the display and use the
keypad anywhere.
120/200 non-volatile memory channels—Built-in
memory allows you to store up to 60/100 channels
with frequency in both VHF and UHF bands. When
you select "Memory SET 120" in the Set Menu mode,
memories can be tagged with a 6-character ID name,
which can be displayed instead of the frequency.
Under the circumstances, memory capacity is
reduced to 110 with 55 memories per band.
® Switchable FM and AM reception— Allows you to
switch between FM and AM reception on the VHF
band so you can clearly hear both amateur and
aircraft transmissions.
© Power on message display— Allows you to set a
6-character power on message that appears each
time you turn on your AT-600.
@ New Set Menu design— Allows you to access a menu
system with full alphanumeric display of functions
and settings. You can browse through a summary of
current operational status.
®Clone function— Both wireless cloning and wire
cloning allows you to copy all settings and memory
contents from one AT-600 to the other AT-600s.
@ DTMF message paging and decading- Allows you to
store up to 10-memory, 15-digit DTMF autodialer for
autopatch operation and decode DTMF sequences
up to 15 digits.

1-2 Accessories
7 [Part Nur
Antenna
1
Belt Clip MX188A002 i
Hand String NX002A010 1
NiCd Battery Pack BA072R167 1
Battery Charger
General KM043X128L 1
U.S.A/Canada KM043X128L 1
Europe(except U. K.) | KMO99X006L 1
U.K. KMO099X019L 1
i
1-3 Getting Acquainted
(1) Power Switch
Press and hold this key for longer than 0.8 seconds
will turn the unit on or off.
(2) VHF Band Volume Control Knob
Turning the contro! clockwise will increase the
volume level for VHF band.
(3) VHF Band Squelch Control Knob
The squelch control is fully counterclockwise by
factory default. Rotating this contro! clockwise and
stop immediately when the noise disappears. If the
squelch control knob is rotated fully clockwise, the
receiving sensitivity will degrade and weak signal
will be blocked.
(4) UHF Band Volume Control Knob
As per (2).
(5) UHF Band Squeich Control Knob
As per (3).
(6) Selector Control Knob
This control knob has different functions depending
on the mode and programmed personality of the
unit. For example, in VFO state , it is used to tune
the frequency. In memory mode, it can be used to
select the memory channel. Further details on this

PHYSICAL LAYOUT

rr
S
control are given in the relevant sections of this
manual.
(7) Lamp
Press the [LAMP] key will turn on the display lamp
for 5 seconds. During 5 seconds, press [LAMP]
again will switch the display lamp off. Used in
conjunction with the [FUNC] key to turn the display
lamp on/off steadily.
(8) SQL OFF
Press the [SQL OFF] key will turn off the squelch
and the hissing noise will be heard if no signal
comes in air.
(9) Microphone
(10) Battery Release
To remove the battery pack, push this clip up
towards the top of the unit and then slide the
battery pack towards the left of the unit.
To replace the battery pack, slide the battery pack
along the battery rail until a click is heard.
(11) External DC Jack
A DC power cord with appropriate polarity and
voltage rating(<16V) can be used to operate your
unit.
(12) Push To Talk( PTT }
To transmit, press this switch while halding the
AT-600 about Sem to 7em from your mouth with the
microphone facing you. Speak in a clear voice at
normal speech level. The LED(14), should glow red
while transmitting.
(13) Function Switch( FUNC )
Used in conjunction with 1, 6, 7, 9 above.
(14) LED
Light red during transmission and light green during
reception. Off when no signal comes in air.
(15) External Speaker/Microphone Jack
Provide the AT-600's user with using an external
speaker and microphone. If an external speaker is
used, the audio from the VHF band and the UHF
band can be split between the internal and
external speaker.
(16) Antenna Port( BNC type )
The antenna supplied with your AT-600 is properly
tuned to the UHF/VHF amateur band frequencies
and is attached to the AT-600 via a BNC connector.
The AT-600 should never be operated without the
correct antenna fitted.

(17) Battery Charge Input Jack.
(18). Alphanumeric Keypad
The 16-key alphanumeric keypad is used for various functions, depending on the mode of operation.
The details is as follows:
[ACALL SFT]
Recall the Cail
store to:
“Press [KEY] during: "| Press [FUNG bed :
+DTMF memory | fo:
Transmit DTIMF
Enter DTMF "A" Entert text ID or
frequency | power on message "A"
[B MAIN MONO ] Select the main Enter DTMF "B" Turn off the Transmit DTMF
band sub-band "B"
[C V/M ENT] Toggle VFO and Enter DTMF "C" Enter a setting Transmit DTMF
memory modes ‘c"
[D CLPS] Clear an entry Enter DTMF "D" Start scanning en DTMF
[1 PO] Enter a digit ina Enter DTMF "1" Change the power Transmit DTMF
frequency of transmission ate
[2 DUAL ] Enter a digit ina Enter DTMF "2" Start the dual Transmit DTMF
frequency watch "2"
[SPL] Enter a digit ina Enter DTMF "3" Lock the [ PTT ] Transmit DTMF
frequenc' function “3°
[4 DTMF Mj Enter a digit ina Enter DTMF "4" Access the DTMF Transmit DTMF
frequency
memory
"4"
[5 CODE] Enter a digit ina Enter DTMF "5" Access the paging Transmit DTMF
frequenc’ code memory hk
Enter a digit ina Enter DTMF “6" Lock the keypad Transmit DTMF
frequency 76°

[7 TSQ] Enter a digit ina Enter DTMF "7" Set the tone Transmit DTMF
frequenc' squelch feature “w
[8 RPT] Enter a digit ina Enter DTMF "8" Set the offset Transmit DTMF
frequency direction "er
[9 REV] Enter a digit ina Enter DTMF "9" Reverse the offset Transmit DTMF
frequency "9"
[0 SET/SB ] Enter a digit ina Enter DTMF "0" Enter the Set Menu | Transmit DTMF
frequency mode. If scanning, “o"
change the scan
resume option.
[* MS MS.M ] Start memory Enter DTMF "=" Toggle the specific Transmit DTMF
scan memory scan for un
memories
[#1D PAG] In memory mode, Enter DTMF "4" Set the DTMF page | Transmit DTMF
toggle the ID and the mode or the DTMF “e"
frequency
code squelch made
|

1-4
Manual
Conventions
Key
entry
conventions
Each
of
the
AT-600's
buttons
has
multiple
functions
Instruction
Description
|
depending
upon
which
mode
the
AT-600
is
in
or
Press
(KEY)
___
[Press
and
release
(KEY)
on
what
other
buttons
you
are
pressing.
To
make
Press
(FUNC)
+
(KEY)
Hold
down
(FUNC
key, then
press
(KEY)
this
manual
easier
to
read
and
use,
we
refer
to
press
[FUNG
)}+
(KEY
)+
(PWR
)
|
Press
and
hold
both
(FUNC)
key
and
each
button
by
the
name
appropriate
to
the
(KEY)
down,
then
switch
on
the
power.
function
you
are
performing
and
use
boldface
Turn
CH
Rotate
selector
control.
character to highlight the function. For example,
when button marked [C V/M ENT] is referred to as:
[C V/M ENT], when transmitting DTMF C.
[C V/M ENT], when switching between the VFO
and memory modes.
[C V/M ENT], when completing an entry.
Many functions are accessed by holding down the
FUNG key, then pressing another key simultaneously.
In this manual, this is indicated as [FUNC]+[KEY].
For example, to store a memory channel operation,
you press [FUNC}+[C V/M ENT], ENT uses boldface
character.

1-5 Using the AT-600's Set Menu
Many of the functions in the AT-600 are configured or
programmed by means of a set menu system. This
system makes it possible to reduce the keys and
controls without eliminating any important features.
There are 29 different set menus or more which you
can choose. To enter the set menu mode, just press
[FUNC] + [0 SET/SB].Once you enter the set menu
mode, you can turn CH (Selector Control) to select
one of the menus you'd like to change.
The configuration structure is designed in alphabetic
order to help user quickly find the desired menu.
Each time you want to set the status of one menu, just
press [FUNC] switch and then turn CH to choose
different selections available. You can also press
[# ID PAG] or [0 SET/SB] key to set the status of one
menu in the set menu mode.
To stored the selected value and exit the set menu
mode, press [FUNC] + [0 SET/SB] again or just press
[D CL PS] key.
SET MENU
ITEMS LIST:
AM Mode
On/(OFf)
APO
On/(Off)
ATT
On/Off)
AUTO AM
Oni(Offy
Set the AM reception mode.
Set auto power off.
With or without reception attenuation.
Auto AM function
AUTO RPT
AUTO PWR ON
OnKOFh)
BEEP
OnKOFf)
Automatically set shift frerquency in VHF band and
St On/Otf)| UHF band
Automatically turn on AT-600.
Set the entry beep sound on/off.
Clone
DTMF clone mode.
S
(110.9)} be selected,
Decode
DTMF (Off)
DTMF TX
Spd (nor)} code.
Change the tone frequency. 38 CTCSS tones can
Decode DTMF tones up ta 15 digits.
Change the sending time interval of the DTMF
Dul WtCh
Duplex
Oni(Off)
Function
Stp (0.1)
Spd (nor)
Change the dual watch speed.
Full duplex mode,
Change the frequency in 0.1, 1, 10 MHz step while
hoiding down (FUNC }switch.
1K Digit
(On)/Ott
Entry of 1 KHz digit while using key pad to enter
VFO frequency.

Memory
SET (120)
Switch 120-set and 200-set of memory
MEM Prot
OniOff)
Set the memory protect flag.
Offset
(0.600)
Change the offset frequency.
PAGE-DLY
(451
Set the paging mode detay time. 450 or 750 ms can
) | be selecte
PageRing Change the number of rings in paging. 5, 1, or off
(5)| can be selected.
PAGE SQL Wait in the paging mode without voice.
Oni(Offy
PwrOnMsg Let the user program his own Power On Message.
(AT-600)
RPT-DLY Set the delay time for cross-band repeater
On/(Off) | transmission.
SAVE Change the battery save time from off, 0.5, 1.0, .......
(Off} | 10 seconds.
Selector Set the selector for use in the key lock mode.
Lock On/(Off)
4
Speaker Select external/internal speaker.
Made (11)
Step Change the frequency step.
(5.0)
TOT Set the time-out timer.
(Off)
Valtage Let the user read the current valtage of battery
| pack.
XBd-RPTR Set the cross-band repeater mode. Both bands
must be displayed to access this item.
() stands for factory default.
10

1-6 A Quick Look at the Display
The dot matrix LCD with backlit provides the AT-600's user with the following indications:
MEMORY © MEMORY 100 MHz 1Mis — MyupoT
BLOCK ADDRESS. COLUMN cotumn “FrasH
NUMBER NUMBER ia Miz DURING SCAN
es Dm { OPERATION)
{UBF BAND]
100 KH:
‘COLUMN
BATTERY LOW = ny
IoreArOn = % KML.
[VER BAND] (WATS) HHH
MAINBAND~ ] q a
STORED MEMORY M| U 0) a
INDICATOR =
-© x A
CROSS BAND ~ 3 t
REPEATER cs
MODE SPECIFIC TRANSMIT t ‘TONE ENCODE
MEMORY PAGING MODE
MEM POWERLEVEL RECEIVED SIGNAL STRENGTH INDICATOR SQUELCH MODE
INDICATOR i HIGH
M:MEDIUM
L: Low cope
SQUELCH
MODE
8
Avienvation
/ - SHE
/ wnuoumex
MODE
AUTO POWER
SCAN RESUME.
TYPE
BATTERY SAVE
MODE
BUAL WATCH
MODE

BASIC OPERATION
2
Basic
Operations
2-3
Using
SQL
OFF
2-1
Turning
Power
On/Off
e
In
two
situations
you
might
use
the
[SQL
OFF]
1.
Press
[PWR]
for
around
1
second
to
turn
ON
key:
(1)
If
you
are
using
paging,
code
squelch,
or
the
AT-600.
tone
squelch,
you
might
not
hear
a
transmission
on
2.
Press
[PWR]
again
for
around
1
second
to
turn
the
current
frequency
even
if
the
squelch
control
is
OFF
the
AT-600.
set
at
its
counterclockwise
position.
(2)
If
you'd
not
like
to
change
the
squelch
level
which
you
set
in
Ab
|
2-2,
you
might
not
hear
a
weak
signal
on
the
current
frequency.
AT-68
To
temporarily
turn
off
squelch,
so
you
can
hear
all
transmissions
on
the
frequency.
2-2
Adjusting
Volume
and
Squelch
1.
Press
[SQL
OFF]
to
turn
off
squelch.
1.
Volume
and
squelch
are
combined
on
one
2.
Release
[SQL
OFF],
the
AT-600
returns
to
normal
control
for
each
band.
The
inner
part
is
volume
squelch.
(VOL) and the outer part is squelch(SQL).
2. The left control is for VHF band and the right 24 Selecting Main Band " ity
control is for UHF band. @ The main band is indicated by "MAIN" icon on
the display. The main band is the band where you
can receive and transmit. Each time you press the
[B MAIN MONO] Key, "MAIN “icon shifts -
between VHF and UHF band in display, When
changing frequencies, memories, tones..........etc,
remember "MAIN" should first be set to related
band.
3. Turn VOL control clockwise to increase the
volume and counterclockwise to decrease it.
4. Turn SQL control clockwise to adjust the squelch
level immediately when the noise disappears
5. The factory default setting for volume and
squelch control is at its counterclockwise position.
12

1. Press [B MAIN MONO] to select the main band.
2. Press [B MAIN MONO] again to confirm that the
main band has been switched.
445,006 | (© 445,000
"145,000 "145. 088
2-5 Selecting Frequency
Using channel selector
1, Press [B MAIN MONO} to select the main band.
2. Press [C V/M ENT] to select VFO mode.
3. Turn the channel selector to select a frequency.
Clockwise rotation increases the frequency one
frequency step at a time. Counterclockwise
rotation decreases the frequency one frequency
step at a time.
4. By factory default, the frequency step is 10KHz
in VHF band and UHF band.
Using keypad
1. Press [B MAIN MONO] to select the main band.
2. Press [C V/M ENT] to select VFO mode.
3. Enter the desired frequency using the numeric
13
keys starting from 100MHz digit to 1KHz digit.
NOTE: Each time you press the [C V/M ENT] key,
the AT-600 shifts between VFO and memory mode.
2-6 Transmitting
® Before transmitting, momentarily press [SQL OFF]
to listen for activity on your channel. Don't interrupt
another user.
1. Press [B MAIN MONO} to select the main band.
2. Press the [C V/M ENT] to select VFO mode.
3. Select the frequency as 2-5.
4. Press [PTT ] on the left top side of the radio and
speak slowly and clearly into the grille area with
the microphone grille about 5cm to 7cm from your
mouth.
5. The TX/RX BUSY LED lights red when [ PTT ] is
pressed and remains on during the transmission.
6. Release [ PTT ] to receive when finished
transmitting.
445, 00
™ 145.558
M ONSERE

a
———
2-7 Inhibiting Transmissions
1.Press F+ [3 P.L.]. The PL icon is displayed.
2.Confirm the transmission is inhibited when
[ PTT ] is pressed.
3.Repeat step 1 to exit the power lock function.
2-8 Selecting Output Power
1, Press [B MAIN MONO} to select the main band.
2. Press [FUNC]+[1 PO]. Each time these keys are
pressed, the transmit output power changes as
Me> LH. The factory default is medium power(M).
445, BB 445, G88
= 145,558 = 145,558
2-9 Changing Frequency Step
©The factory default is 10KHz for both VHF band
and UHF band.
1. Press [FUNC]+[0 SET/SB] to enter the Set Menu
mode.
14
2. Turn CH to the menu "Step 10.0".
3. Hold down [FUNC] and turn CH to change the
frequency step. Eight frequency steps can be
selected. You can also press [# ID PAG] or
[0 SET/SB] to change the setting.
4. Repeat step 1 or press [D CL PS] to exit the Set
Menu mode.
2-10 Changing Frequency Step in 100KHz,
1MHz or 10MHz
m@ Changing frequency in 100KHz step,
4, Hold down [FUNC ] and turn CH.
m@ Changing frequency in 1 MHz or 10 MHz,
1. Press [FUNC]+[0 SET/SB] to enter the Set
Menu mode.
2. Turn CH to the menu " Function Stp 0.1".
3. Hold down [FUNC] and turn CH to change the
menu to" Function Stp 1.0"or" Function
Stp 10.0". You can also press [# ID PAG] or
[0 SET/SB] to change the setting.

4.
Repeat
step
1
or
press
[D
CL
PS]
to
exit
the
Set
Menu
mode.
5. To change the frequency in 1MHz or 10MHz step,
hold down [FUNC] and turn CH.
Function
“ote Gl
2-11 Using Key Lock
Sometimes you may want to lock the AT-600's
keypad so you do not accidentally change settings.
1. Press [FUNC]+[6 K.L.].
2.
The
key
icon
is
shown
on
the
right
top
of
the
display.
3. Repeat step 1 to exit the key lock function.
= 445, G00 ©
"145.550
2-12 Using Selector Lock and Key Lock
®@ Sometimes you may want to lock the AT-600's
channel selector contro! and keypad simultaneously,
perform the following operation procedures.
1. Press [FUNC]+[0 SET/SB] to enter the Set Menu
mode.
2. Turn CH to select the menu "Selector Lock Off".
3. Hald down [FUNC] and turn CH to change the
menu "Selector Lock On". You can also press
{# ID PAG] or [0 SET/SB] to change the setting.
4, Repeat step 1 or press [D CL PS] to exit the Set
Menu mode.
5. Press [FUNC]+[6 K.L].
6. Perform the reverse order to unlock the channel
selector and keypad.
“Selector
Lock Off
“Selector
Lock On
* 445. HEE ©
"145,550
2-13 Single Band Operation
@ Normally, the AT-600 monitors both UHF band and
VHF band at the same time. To turn off the sub-
band,

so the AT-600 only monitors the main band.
1. Press [B MAIN MONO] to select the main band.
2. Press [FUNC]+[B MAIN MONO].
3. The sub-band is turned off and the display only
shows the main band
4. Press [B MAIN MONO] to return the dual band
mode.
™ 445, 668
2-14 Using Display Light
® You can turn on the display lamp for 5 seconds or
turn it on so it stays on .
1. Press [LAMP] to turn on the display lamp for 5
seconds.
2. Press [FUNC]+[LAMP] to turn on the display lamp
so it stays on.
3. Press [FUNC]+[LAMP] again to turn off the display
lamp.
2-15 Testing Display Window
1. Press [PWR] for around 1 second to turn off
the AT-600.
2. Press [PWR]+[3 RL].
3. Release [PWR] and press [3 P.L.] only, the whole
display keeps on.
4. Release [3 P.L.] and return to the normal
operation mode.
NOTE: This is for test purpose only.
oe INS ONNE AO
fe
2-16 Resetting the AT-600
@If the AT-600 seems to be malfunctioning, follow
these steps to reset it.
4. Press [PWR] for around 1 second to turn off
AT-600.
2. Press [FUNC]+[D CL PS]+[PWR] to turn on
AT-600. The AT-600 displays
"RESET? Press C".
3. Press C to confirm the reset or press any other key
to cancel.
CAUTION! This erases all data in memories.
' RESET? RESET! |
Press C

MEMORY FUNCTION
3 Memory Function
Besides two Calling channels, the AT-600 allows you
to store up to 120/200 sets of frequency into memory,
with 60/100 memory channels in each VHF and UHF
band. When you select "Memory SET 120" in the Set
Menu mode, memories can be tagged with a
6-character ID name, which can be displayed instead
of frequency. Under the circumstances, the memory
capacity is reduced to 110 with 55 memories
(MO0-M54) in each band. In addition ta store
frequency and ID name, each memory can hold
repeater mode, offset frequency, paging mode or
code squelch mode, and tone encode mode or tone
squelch mode.
3-1 Storing Frequencies into Memory
1. Press [B MAIN MONO] to select the main band.
2. Press [C V/M ENT] to select the VFO mode.
3. Set the frequency you want to store and set all
other options to your desired settings.
3. Press [FUNC]+[C V/M ENT]. Two dashes should
appear to the left of the frequency.
4. Use the keypad to enter a two-digit number (from
00 to 55).
7
5. Confirm "M" and the memory number appear
for one second and returns to the VFO.
Note: If you enter an invalid memory number, the
AT-600 sounds a "Bu" tone and memory store is
canceled. Repeat steps 3- 4. If you'd like to store
frequency only, you can store 60 memories.
<-445, 668 me1445, BBG
145, 558 145.558
3-2 Recalling Memory
@ You can use the selector contro! or the keypad to
recall stored memory. If you select a memory which
has information stored in It, "M" appears to the left
of the memary number and the AT-600 recalls all
stored settings. If you select a memory which has
no information stored in it, "M" doesn't appear.
1. Press [B MAIN MONO] to select the main band.
2. Press [C V/M ENT] to select the memory mode.
3. Turn CH to select a memory address or use the
keypad to enter a two-digit memory number.
4. Turn CH while holding down the [FUNC] key will
change memories 10 at a time.