Programmable encode/decode format
Supports DTMF and several 5-tone formats
Easy to read backlit LCD display
Serial printer logging (w/optional cable)
COPYRIGHT 2001-2004 MIDIAN ELECTRONICS INC. ALL RIGHTS RESERVED.
MIDIAN ELECTRONICS, INC.
To Order: 1-800-MIDIANS
DDU-100/200
2030 N. Forbes Blvd. #101
Telephone: (520) 884-7981
Tucson, Arizona 85745
Email: sales@midians.com
1 SPECIFICATIONS
Voltage/Current
Operating Voltage (nominal) ................................. 12 VDC
Operating Voltage (min-max) ........................... 12-15 VDC
Operating Current (standby @12 VDC) ................. 100 mA
Operating Current (peak @15 VDC) ...................... 500 mA
4.2 MENU MODE ......................................................................................................................................... 6
4.3 USER DATABASE .................................................................................................................................. 7
4.4 STATUS DISPLAY FEATURE ................................................................................................................... 8
5.4 USERS MENU ...................................................................................................................................... 8
impedance of the DDU can be adjusted if necessary by
2 OVERVIEW
The DDU provides the optimal ANI display decoder
solution for small and medium sized radio systems
such as those used by taxi fleets, police departments,
construction crews, etc. It offers many features
normally found only in large and expensive Computer
Aided Dispatch (CAD) systems in one compact
desktop unit.
It can encode and decode most popular tone signaling
formats. The last 10 ANI's received can be reviewed at
any time. It can store up to 137 aliases in its user
database. The user friendly menu system makes it as
easy to use as a cell phone. Additional features include
status display and the ability to automatically mute
incoming leading ANI's
replacing leaded resistor R81 with an appropriate
value.
PTT OUTPUT (P1-3) [Yellow]
This open collector output provides a ground to key-up
the radio when transmitting. If connecting to a relay in
the radio, make sure the coil is bypassed with a diode
to eliminate counter-EMF.
This output may also be assigned to be the repeater
access control output. See REPEATER SETUP for
more information.
circuits, which are susceptible to damage from high static
charges. Be sure to follow standard antistatic procedures
when handling, including using grounded workstations and
soldering irons and wearing grounding bracelets.
3.1 RADIO INTERFACE
Radio Interface connector P1 is an 8-pin
RJ-45 style connector in the center of the
back panel.
+V IN (P1-5) [Red]
The DDU can be powered either by an optional wall
transformer or by the radio power supply. Connect this
wire to the radio power source provided it is between
12 and 15 VDC.
If using a wall transformer, make sure the voltage is
between 12 and 15 VDC and the current rating is at
least 800mA. Also, be certain that positive is
connected to the inside ring.
GROUND (P1-6) [Black]
Connect to radio ground.
AUDIO INPUT/RX IN (P1-8) [Blue]
Connect to a point in the radio where receive audio is
present at a constant level. If using PL or CTCSS, be
sure to connect to a point after the CTCSS high pass
filter. If using the Squelch Output of the DDU, be sure
the RX audio point is not muted when the radio is
squelched.
AUDIO OUTPUT/TX OUT (P1-4) [Green]
Connect to the mic-hi input of the radio. The output
Connect to a point in the radio squelch or CTCSS
circuit that changes logic level when carrier (or
CTCSS) is detected. A radio whose circuitry provides a
logic-low or logic-high can readily turn Q1 on and off. If
only a high level is provided, it may be necessary to
move R40 from its pull-up to its pull-down position.
Note that it is required that the COR Input be in the
active state in order to decode all formats except
DTMF. If COR is not to be connected, make sure it is
programmed to be active HIGH. A COR connection is
required in order to use busy lockout, auto ANI mute,
and repeater access control features.
MONITOR OUTPUT (P1-7) [Orange]
This output can be used to control the monitor function
of the radio using the <MONITOR> button on the DDU.
This is an open collector output which changes state
each time the <MONITOR> button is pressed.
This output may also be assigned to be the repeater
access control output. See REPEATER SETUP for
more information.
SQ OUT/LTR IN (P1-2) [Brown]
This wire may be either a Squelch Output or a
Trunking Delay (LTR) input, but not both. To use as a
squelch output, install jumper R85 and make sure
jumper JU5 is not installed. To use as a trunking delay
input, remove R85 and install JU5.
When used as a Squelch Output, connect to a point in
the radio which will mute the speaker when brought to
ground (or left floating). Program the appropriate
polarity in the RADIO SETUP menu.
When used as an LTR Trunking Delay Input, connect
to a point in the radio which changes state between 0
and 5 VDC when a channel has been acquired on the
LTR trunking system. The active (channel acquired)
state of this input is programmable in the RADIO SETUP menu.
DDU-100/200 Manual
MIDIAN ELECTRONICS INCORPORATEDPAGE 5
3.2 JUMPER SETTINGS
There are two user configurable jumpers, JU1 and
JU4. Both are installed at the factory. JU1 allows
signaling audio to be heard in the local speaker. If this
is not desired, cut JU1.
JU4 controls the output impedance of transmit audio.
See OUTPUT LEVEL below to determine if JU4 will
need to be cut.
3.3 ADJUSTMENTS
Once the unit has been connected to the radio, several
adjustments must be made to achieve proper
operation. It will be necessary to open the unit. Use the
pictorial to identify the location of the following trim
pots: R2 and R32 near connector P3, R51 near IC U6,
and R105 near the volume control.
INPUT LEVEL (when using decode feature)
Use a service monitor to generate a 1000 Hz test tone
at 2/3 of maximum system modulation (typically 3.3
kHz). Measure the voltage appearing at TP1 and
adjust R2 such that TP1 is at 250mV RMS.
It is also important to program COR Polarity to match
that of the radio. If this is not set properly, the DDU will
not decode some of the formats.
Be sure to set the time of day via TIME SETUP once
the DDU is operating as desired. Once the time is set,
be sure to leave the unit on at all times or else the time
will have to be reset. The time can only be set to the
nearest minute. Seconds are kept track of internally
and start running the instant the unit is turned-on. It is a
good idea to check the time clock monthly as crystal
and temperature variances affect the accuracy.
4 BASICOPERATION
4.1 DISPLAY MODE
The DDU operates either in Display Mode or Menu
Mode. In display mode, the DDU normally displays the
OUTPUT LEVEL (when using encode feature)
Use a service monitor to measure the modulation level
generated by the DDU. Cause the DDU to generate
tones by typing in a few digits and pressing <SEND>.
Adjust R51 so that the modulation level is at 2/3 of the
maximum system modulation (typically 3.3 kHz).
If the output level cannot be adjusted low enough, it will
be necessary to cut JU4. This changes the output from
low impedance to high impedance.
Tip: EIA format tone 3 is 1023 Hz. Programming the
encode format to EIA and setting encode time to 2000
milliseconds provides a handy test tone. Simply enter
the digit 3 and press <SEND> for 2 seconds of test
tone.
SPEAKER PRE-AMP
Though the DDU has a volume control knob, it also
has an input audio pre-amplifier. While listening to
audio on the channel, adjust R32 so that the minimum
and maximum volume control settings are at desired
levels.
last ANI received.
4.1.1 Reading the Display
ID (ANI) – This is the numeric ID (or ANI) of the user who last transmitted on the channel. When the Status
Feature is enabled, this area will alternate between
displaying the ANI and the status message every 2
seconds.
TIMESTAMP – This is the time of day that the last ANI
was received. The timestamp is in 24-hour format. In
24-hour format, 4 A.M. is displayed as 04:00 and 4
P.M. is displayed as 16:00. Note that the timestamp
changes only when a new ANI comes in, it is not a
time-of-day clock.
3.4 CONFIGURATION SETTINGS
Once adjustments have been made, it will be
necessary to configure the DDU to meet the system
requirements. This is done via Menu Mode. The most
crucial settings include Decode Format and Encode
Format (if using encode feature). Refer to ENC/DEC
SETUP menu item. Pay close attention to Encode
Time 1 & 2 and Decode Time as well.
USER NAME – This is the name of the user
associated with the numeric ID that was received. User
names are stored in a database. The database must
be configured before names can be displayed.
SCROLL LEFT INDICATOR – Indicates that there are
other ANI’s previously logged. Press the left
<SCROLL> button to view the previously logged items.
DDU-100/200 Manual
PAGE 6 MIDIAN ELECTRONICS INCORPORATED
POWER / EMERGENCY LED – Glows red when
power is turned on. Blinks between orange to indicate
that an emergency status message was received
recently. This indicator remains blinking until the
operator presses any key.
TRANSMIT / BUSY LED – This LED is off when there
is no activity. It glows red during transmit. It blinks
green any time the radio channel is busy.
4.1.2 Keypad Operation in Display Mode
<SCROLL> LEFT - When in Display Mode, the keypad
<SCROLL> keys are used to scroll through the
previously logged ANI’s. The scroll left indicator
remains present on the screen so long as there are
more previous entries to be viewed. The scroll left
indicator disappears when the oldest entry is reached.
<SCROLL> RIGHT - A scroll right indicator will appear
on the right side of the screen when there are newer
entries available for viewing. Press the right
<SCROLL> button to view the newer entries. When the
last entry is reached, the right scroll indicator
disappears.
<#> POUND KEY – Repeatedly pressing the <#> key
will always return the DDU to display mode with the
last ANI received being shown.
menu mode). Upon selection, the name of the item will
appear on the top line of the display. The bottom line
will present additional items for selection. Press the
<#> key to return to the previous selection.
4.2.2 Calling a Unit in the Database
To place a call to a unit in the database, first select
CALL from the Main Menu. Press the right <SCROLL>
button to display the first user in the database. Either
the User ID will be displayed, or the User Name (alias)
will be displayed. This is determined by the Call Entry
Mode setting.
<MONITOR> - This button always controls the monitor
function of the radio. Press <MONITOR> to toggle the
state of the monitor output to the radio.
<SEND> - Activates the radio PTT switch, placing the
radio in transmit mode. This is especially useful if your
DDU is equipped with an optional gooseneck
microphone.
NUMBER KEYS – Pressing one of the number keys
<0> through <9> causes the DDU to jump directly into
call mode. See Calling a Unit for more information.
<*> STAR KEY – Pressing the <*> will place the DDU
in Menu Mode at the main menu.
4.2 MENU MODE
The Menu Mode provides the ability to place calls to
radio users and configure the DDU.
4.2.1 Navigating the Menus
Press the star key <*> while in Display Mode to place
the unit into Menu Mode. Upon entry to Menu Mode,
you will be in the Main Menu. The top line of the
display indicates this. The bottom line displays an item
available for selection, in this case the CALL
command.
The scroll right symbol on the right side of the display
indicates that additional items are available. Press the
right <SCROLL> button to view the next available item.
The scroll left symbol will then appear, indicating that
the left <SCROLL> button may be used to go back to
the previous item.
To select the displayed item, press the <SEND> button
(the <SEND> button acts like an ENTER key when in
The left and right scroll indicators will appear on the
bottom line. This is the Select Mode. Use the
<SCROLL> keys to locate the desired user within the
database. When the name is located, press the
<SEND> key to place the call. The <#> key may be
used at any time prior to pressing <SEND> to cancel
the call.
To locate a user in the database more quickly, you can
enter one or more of the first few digits/letters of the
User ID/Name prior to pressing the right <SCROLL>
button. The DDU will search the database for users
matching the first few digits/letters.
4.2.3 Calling a Unit Not in the Database
To place a call to a unit which is not in the database,
start by selecting CALL from the Main Menu or by
pressing a number key while in display mode. Instead
of pressing the right <SCROLL> button, simply key the
numeric ID of the user to be called using the keypad.
Press <SEND> to initiate the call. The left <SCROLL>
key may be used as a backspace key to correct any
errors made during entry. The <#> key may be used at
any time prior to pressing <SEND> to cancel the call.
4.2.4 Numeric vs. Alphanumeric Entry
There are two different data entry modes available on
the DDU. As shipped from the factory, Numeric entry
is the default mode when calling a unit. As numbers
are entered, they appear on the bottom-left of the
DDU-100/200 Manual
MIDIAN ELECTRONICS INCORPORATEDPAGE 7
display. Pressing the <*> key while in numeric entry
mode changes the mode to Alphanumeric.
In alphanumeric mode, you may type in letters and
numbers as described in the next section. This allows
you to type the name of a user in the database without
having to scroll through the names. Alphanumeric data
appears on the bottom line of the display as it is
entered. You may make alphanumeric call entry the
default mode by changing the Call EntryMode setting
in the CONSOLE SETUP menu.
4.2.5 Entering Alphanumeric Data
Entering alphabetic characters using the numeric
keypad is easy. All of the letters of the alphabet appear
above the numbers on the keypad. For example, the
letters ‘A’ ‘B’ and ‘C’ appear on the <2> key.
Alphabetic characters are entered by pressing 2 digits.
The first digit is the key with the desired letter
appearing on it. The 2
on that key. For example, the code for the letter ‘C’ is
23 since it is the 3
is the 1
st
letter on the <8> key, so its code is 81.
nd
digit is the position of the letter
rd
letter on the <2> key. The letter ‘T’
To enter numeric characters in an alphanumeric field,
press the <0> key followed by the desired digit.
Punctuation characters such as comma <,> and <-> do
not appear on the keypad. Special codes have been
assigned to allow entry of those characters. Please
refer to the following chart
Note: Alphanumeric mode cannot be used to enter
user ID's (ANI's). In alphanumeric mode, numbers are
treated the same as letters.
The code 10 is used to insert a space between
characters.
4.2.6 Entering Special DTMF Digits
The DDU supports the following special DTMF 'digits'
in numeric entry mode: *, #, A, B, and C (D is not
supported). These are entered using 2-key sequences
as follows:
* = * * # = * # A = * 1 B = * 2 C = * 3
These special digits can only be entered when adding
a User ID to the database. They cannot be dialed
directly from the CALL menu. Also, these special
sequences should not be used unless you are using
DTMF as the encode or decode format.
4.2.7 Locking and Unlocking the Menus
The menu system incorporates a lock feature to
prevent unauthorized personnel from changing the
DDU configuration. The lock feature also serves to
simplify day-to-day operation of the unit.
When the LOCK command is selected, all of the
menus are disabled. The only items available will be
CALL and UNLOCK. Selecting UNLOCK makes all of
the menu items available again.
When locked, the unit is password protected so only
authorized personnel may unlock the menus. As
shipped from the factory, the security feature is
disabled and the LOCK/UNLOCK options do not
appear. To enable the feature and select a password,
see the SECURITY SETUP menu item.
Remember your password! Once security is enabled
and the menus are locked, the only way to unlock will
be to use the password. If you do forget the password,
contact Midian for the reset procedure.
4.2.8 Repeater Access Control
The DDU can be interfaced to a repeater to limit
access only to those users who are authorized. This is
accomplished by requiring an ANI of the proper format
before granting access. Access can be further
restricted by requiring that the ANI match a User ID
stored in the database. See REPEATER SETUP for
more information.
4.3 USER DATABASE
The user database makes day-to-day operation of the
DDU much easier. You can use easy-to-remember
names instead of just numbers.
4.3.1 User Database Features
The primary purpose of the user database is to
associate names with numbers. This way, when an
ANI comes in, the name of the person can be
displayed along with the ANI. Having a user database
simplifies the calling of units allowing you to scroll
through a list of names.
Another feature of the database is the ability to assign
Kill and Spy ID’s to a user. These features are
designed to work with Midian’s encoder/decoder
products such as the UED-1 series. They allow the
operator of the DDU to disable a radio in the field or
listen in on it.
The DDU can store up to 137 names and ID numbers
in its database. The DDU retains the database memory
even when switched off.
4.3.2 Setting Up the User Database
Begin by compiling a list of names and ID numbers.
DDU-100/200 Manual
PAGE 8 MIDIAN ELECTRONICS INCORPORATED
Give some thought on how you are going to abbreviate
the names since only 14 characters per name are
available. To begin entering data, select Add User
from the USERS menu. See the description of these
items in the USERS menu section for more
information.
4.4 STATUS DISPLAY FEATURE
4.4.1 How Status Display Works
The status display feature treats the last digit of an ANI
as a status digit. This digit can be translated to a
status message that can be displayed on the DDU. Up
to 10 status messages can be configured,
corresponding to the digits 0-9.
Say for example that the ANI of a particular unit is
1234X where X is the status digit. If you are running a
taxi fleet, you may wish to specify status information as
follows:
CODE STATUS MSG MEANING
12340 <blank> Normal ANI, no status
12341 OFF DUTY Off duty, not available
12342 ON DUTY On duty
12343 FLAG UP Beginning fare
12344 FLAG DN End of fare
12345 EN ROUTE En-route to pickup fare
12346 NO FARE Nobody at pickup location
12347 REPEAT Repeat last call
12348 BREAKDOWN Car broke down
12349 EMERGENCY Emergency, need help
You can configure the status messages as you see fit
using the STATUS SETUP features. If the Emerg Status feature is turned on, the status digit 9 is used
for emergency ANI. This will cause the emergency
LED to blink and an alarm siren to sound (if enabled).
Status messages are not displayed by default, this
must be enabled via the STATUS SETUP menu. When
the Status Feature is enabled the last digit of the ANI
is automatically blanked out. Instead, the ANI and the
status message are placed on the 1
display, alternating every 2 seconds.
st
line of the
enter the numeric ID of the unit you wish to call. If the
user database is set up, you may use the right
<SCROLL> buttons to go into Select Mode and find
the name of the user to be called using the left and
right <SCROLL> keys.
Alternatively, you can enter the User ID or User name
in part or in whole. When entering the complete name
or ID, simply press <SEND> to place the call. When
entering a partial name or ID, press the right
<SCROLL> button and find the user you wish to call.
Remember, you can use the <*> to toggle between
numeric and alphabetic entry modes.
5.2 LOCK OR UNLOCK COMMAND
Note The LOCK and UNLOCK menu options do not
appear unless enabled in SECUIRTY SETUP.
Selecting LOCK will disable access to the parts of the
menu system described in the following sections.
Select UNLOCK to enable the entire menu system.
You must enter a 4-digit password to unlock the menu
system. See SECURITY SETUP for more information.
5.3 ACTIONS MENU
5.3.1 Spy command
Allows you to remotely key up and listen to a unit. This
feature is designed to work with Midian’s UED-1 series
encoder/decoders. The code for spying on a unit must
be in the user database to use this function.
5.3.2 Kill command
Allows you to remotely disable a unit. This feature is
designed to work with Midian’s UED-1 series
encoder/decoders. The code for killing a unit must be
in the user database to use this function.
5.3.3 Clear ANI Log command
Allows you to clear the ANI log without having to turn
the unit off and back on.
5.4 USERS MENU
5.4.1 Add User menu
Allows you to add a new user to the database. When
ADD USER is selected, you will be prompted to fill in
the information for that user such as User ID and User
Name. See EDIT USER for more information.
5 MENUSYSTEM
The following sections describe the various functions of
the menu system. Factory default settings are
underlined.
5.1 CALL COMMAND
Allows you to place a call to units equipped with ANI
selective call decoders. You will be given the option to
5.4.2 Delete User menu
Allows you to delete a user record from the database.
When DELETE USER is selected, you will be able to
select the user you wish to delete in the same manner
as if placing a CALL. Use the scroll buttons to find the
user you wish to delete. Press <SEND> to delete the
selected user. You will have to press <SEND> a
second time to confirm. Press <#> to cancel if you
change your mind.
DDU-100/200 Manual
MIDIAN ELECTRONICS INCORPORATEDPAGE 9
5.4.3 EDIT USER menu
Allows you to change information about a user. Select
the user you wish to edit in the same manner is if
placing a CALL to that user. Use the scroll buttons to
find the user you wish to edit. Press <SEND> to edit
the information for the selected user.
You will be prompted to fill out each field in turn. After
entering the data for a field, press <SEND> to go on to
the next field. To leave a field unchanged, simply press
<SEND> without entering data.
5.4.3.1 User ID field
This numeric field contains the primary ANI number
assigned to the user’s radio. This will be the number
used when calling a unit. ID’s may be 1 to 8 digits
depending on the ANI format used.
Range: 0-8 digits
Default: blank
5.4.3.2 User Name field
This alphanumeric field contains the name of the user
associated with the user ID. A maximum of 14
characters may be used. See the Entering
Alphanumeric Data section for more information.
Range: 0-14 characters
Default: blank
5.4.3.3 Spy ID setting
Specify the code required to spy on this unit. Leave
blank if not using this feature.
Range: 0-8 digits
Default: blank
5.4.3.4 Kill ID setting
Specify the code required to disable this unit. Leave
blank if not using this feature.
Range: 0-8 digits
Default: blank
5.5 SETUP MENU
5.5.1 SOUNDS SETUP menu
5.5.1.1 Keypad Beep option
Turning this option on causes a beep to be heard for
each key press.
OFF Keypad beeps off.
ON Keypad beeps on.
5.5.1.2 Beep On ANI option
Turning this option on will cause an alert beep to be
heard every time a new ANI is received.
OFF Do not beep when ANI comes in.
ON Beep when ANI comes in.
5.5.1.3 Emerg Siren option
This causes a siren sound to be heard when an
emergency ANI is received. This requires turning on
the Emerg Status option in the STATUS SETUP
menu.
OFF Do not sound siren on emergency ANI.
ON Sound siren on emergency ANI.
5.5.1.4 Internal Speaker setting
Normally, the internal speaker is on. This is required in
order for key beeps, error beeps, confirmation beeps,
and other system sounds to be heard. This also allows
audio received from the radio to be heard at the
console. If it is desired that absolutely no sound be
heard from the console speaker, this setting allows it to
be switched off.
OFF Internal speaker disabled.
ON Internal speaker enabled.
5.5.1.5 Auto Mute Speaker feature
This feature is designed to mute the internal speaker
while an ANI is being received. It works in conjunction
with the Auto Mute Time in the RADIO SETUP menu.
When this feature is enabled, the internal speaker
remains muted so long as there is no COR indication
coming from the radio. When the COR indication goes
active, the internal speaker will automatically unmute
after the Auto Mute Time expires. Note: System
sounds can still be heard during the mute period.
OFF Do not mute the internal speaker.
ON Mute/unmute speaker automatically.
5.5.2 TIME SETUP menu
In order for the correct time to be displayed, the time
clock must be set. The unit must remain switched-on
at all times in order to keep track of the time. The clock
must be set each time the unit is powered up.
5.5.2.1 Hour setting
Set the hour of the day in 24-hour format. Enter two
digits.
Range: 00-23
Default: 00
5.5.2.2 Minute setting
Set the minutes past the hour. Enter two digits.
Range: 00-59
Default: 00
5.5.3 CONSOLE SETUP menu
5.5.3.1 Call Entry Mode setting
Determines if numeric entry or alphanumeric data entry
is the default mode when placing a call. The mode of
entry can be toggled by pressing the <*> key during
DDU-100/200 Manual
PAGE 10 MIDIAN ELECTRONICS INCORPORATED
data entry (except when entering ANI's).
NUMERIC Start in numeric only mode.
ALPHA Start entry in alphanumeric mode.
5.5.3.2 Fast Scrolling setting
Fast Scrolling allows for faster navigation through the
menu system. The DDU can also animate the scrolling
of the screen from side-to-side. This provides positive
feedback in response to scrolling through menus and
the ANI log. If this effect is desired, Fast Scrolling can
be disabled.
OFF Animate scrolling from side to side.
ON Scroll at fast speed.
5.5.3.3 Contrast setting
Allows the display contrast to be adjusted for best
viewing.
LOW Low contrast setting.
HIGH High contrast setting.
5.5.3.4 Mic. Option setting
Selects which type of optional microphone accessory is
attached to the DDU. This is necessary so that the
DDU knows how to treat the external (for exmpale offhook or monitor).
The DDU, if ordered with the printer cable option, can
log the ANI traffic to a serial printer. The printer must
have a print buffer and a standard RS-232 port. It must
be configured for 9600 baud, 8 data bits, 1 stop bit and
no parity. In order to send data to the printer, this
option must be on.
OFF Do not send data to printer.
ON Send data to printer.
Default: 0000
5.5.5 RADIO SETUP menu
5.5.5.1 Keyup Delay setting
This sets the Key-Up Delay, also known as Front
Porch Time. This is the amount of time the DDU will
wait after asserting PTT before sending tones over the
air. This time allows for delays introduced by repeaters
and decoding of squelch control signals such as
CTCSS.
Range: 0005 to 4000 milliseconds
Default: 0400 milliseconds
5.5.5.2 COR Polarity setting
Determines which state of the COR (carrier detect)
input is considered the active state. When COR is
active, the radio channel is busy. Important Note: The
DDU will not decode 5-tone formats unless the COR
input is active. If not connecting the COR Input to the
DDU, this setting should be HIGH. If the radio is using
PL/CTCSS, it is recommended that the COR Input be
connected to a point which goes active when PL is
detected.
The COR input is used in conjunction with the Busy Lockout feature. If not connecting the COR input, do
not enable Busy Lockout .
LOW Channel is busy when COR is 0V.
HIGH Channel is busy when COR is 5V.
5.5.5.3 Busy Lockout option
This option prevents the DDU from transmitting on a
busy channel. If this option is ON, the unit will not
transmit when the COR input is in the active state.
When making a call and the channel is busy, the DDU
will wait until the channel is clear and then transmit.
New calls cannot be placed until the pending call is
completed or canceled. When this option is OFF, the
unit will transmit regardless of the state of the COR
input.
OFF Transmit regardless of COR input.
5.5.4 SECURITY SETUP menu
5.5.4.1 Security setting
Allows the security option to be turned on and off. If
turned off, the LOCK/UNLOCK menus will not appear.
ON Enable security feature.
OFF Disable security feature.
5.5.4.2 Password setting
Sets the password required to UNLOCK the menu
system when the Security is turned on. Must be 4
numeric digits.
ONDo not transmit when channel busy.
5.5.5.4 Squelch Polarity setting
Determines the active state of the Squelch Output. The
Squelch Output is used in conjunction with the COR
Input and the Auto Mute Time to mute incoming ANI
packets.
LOWRadio is squelched when the Squelch
Output. Is brought to GND.
HIGHRadio is squelched when the Squelch
Output is not at GND (floating).
5.5.5.5 Auto Mute Time setting
Range: 4 digits
Specifies the amount of time after the COR Input
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MIDIAN ELECTRONICS INCORPORATEDPAGE 11
becomes active for the Squelch Output to go inactive.
This allows the Squelch Output to be used to mute
incoming ANI's if connected to a point which disables
the radio speaker. This value should be set to allow for
any key-up delay of the transmitting unit as well as the
time it takes for the ANI to complete.
Range: 0000 to 4000 milliseconds
Default: 0300 milliseconds
5.5.5.6 Trunk Delay Polarity setting
When using with trunked radios, this setting
determines the active state of the Trunking Delay Input
(a.k.a. LTR in). This input is used to hold-off
transmitting a call until a channel is acquired on the
trunking system. If a channel is not acquired within 4.5
seconds, a timeout will occur and the call will be
canceled. Important note: The Trunking Delay Input
shares the same wire as the Squelch Output. Normally
the wire acts as the Squelch Output. The DDU must be
jumpered correctly to configure this wire for trunking.
Please see the installation instructions.
When not using the Trunking Delay Input, this setting
should be HIGH.
LOWTrunking signal goes to 0V when a
channel is acquired.
HIGHTrunking signal goes to 5V when a
channel is acquired.
Range: 0005 to 1000 milliseconds
Default: 0050 milliseconds
5.5.6.3 Encode Time 2 setting
When using 5-tone formats (non-DTMF): This is the
duration of each of the remaining tones (or digits) of
the encode sequence. Normally, this should be the
same as Encode Time 1.
When using DTMF format: This is the tone OFF time
(between digits) when using DTMF format.
Range: 0005 to 1000 milliseconds
Default: 0050 milliseconds
5.5.6.4 Decode Format setting
The tone-signaling format of the incoming ANI's. The
Encode and Decode formats may be different if
desired. Select from one of the following formats:
DTMF
CCIR
EEA
EIA
ZVEI
DZVEI
DDZVEI
5.5.6 ENC/DEC SETUP menu
5.5.6.1 Encode Format setting
The tone-signaling format used to encode outgoing
calls. Select from one of the following formats:
DTMF
CCIR
EEA
EIA
ZVEI
DZVEI
DDZVEI
NATEL
MODAT
5.5.6.2 Encode Time 1 setting
When using 5-tone formats (non-DTMF): The
amount of time for the first tone (or digit) of the encode
sequence (may also be a preamble). This is also
known as tone width. Each ANI format has standard
tone widths. Non-standard tone widths are permitted,
allowing for faster encode.
When using DTMF format: This is the tone ON time
for DTMF format.
NATEL
MODAT
5.5.6.5 Decode Time setting
When using 5-tone formats (non-DTMF): The
minimum amount of time a single tone must be present
before it is decoded. This time can be as little as 5
milliseconds. This time should be set between 1/2 and
th
of the encode timing. For example, if the encode
1/5
timing is 50 milliseconds per digit, then the Decode
Time should be set between 5 and 25 milliseconds.
The lower the number, the more sensitive the unit will
be. When the number is higher, the unit will be less
susceptible to falsing on noise.
When using DTMF fo rmat: The amount of time after
the last digit is received for decode to take place. This
value should be at least twice that of the digit OFF
time.
Range: 0005 to 9999 milliseconds
Default: 1000 milliseconds
5.5.6.6 Ignore Nonuser option
Turning on this option helps prevent the display of false
decodes by ignoring ID’s which do not appear in the
user database. This can also be used to restrict access
to a repeater to only those ID’s in the database. See
REPEATER SETUP for more information.
OFF Display ID’s not in database.
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PAGE 12 MIDIAN ELECTRONICS INCORPORATED
ON Ignore ID’s not in database.
5.5.7 REPEATER SETUP menu
5.5.7.1 Repeat Control option
Allows the DDU to control access to a repeater.
Causes the DDU to assert a PTT ou tput to a repeater
upon receipt of either: (1) any ANI in the format
decoded by the DDU or (2) a valid User ID in the user
database. To restrict repeater access to valid User ID’s
only, the Ignore Nonuser option in the ENC/DEC SETUP must be turned ON. Otherwise, any incoming
ANI of the proper format will be considered valid.
Other possible uses of the Repeat Control option
include operation of a horn relay or the enabling of a
PA speaker. Repeater control output can either be the
PTT output, or the MONITOR output (see below).
OFF Repeater control disabled.
ON Repeater control is enabled.
5.5.7.2 Validate Time setting
This sets how long after COR becomes active, that the
repeater will be keyed prior to receiving a valid decode.
This allows time for the incoming ANI to be broadcast
by the repeater before it has been validated. If no ANI
(or valid User ID) has been decoded during this time,
the repeater will be un-keyed. The repeater will remain
un-keyed until COR goes inactive.
If set to 0, the repeater will not be keyed until after the
ANI (or valid User ID) has been decoded.
Range: 00 to 99 10ths of a second (0.0 - 9.9 s)
Default: 10 10ths of a second (1.0 second)
5.5.7.3 PTT Hang Time setting
Once validation has occurred, this sets how long the
repeater will remain keyed after COR goes inactive.
Once the hang timer expires, a new validation will be
required to access the repeater.
Range: 00 to 99 10ths of a second (0.0 - 9.9 s)
Default: 20 10ths of a second (2.0 seconds)
5.5.7.4 Hang Reset setting
This setting specifies what is required to reset the PTT
hang timer before it expires. This can either be COR
or COR+ANI. When set to COR, the hang timer will be
reset if COR goes active prior to expiration, allowing
the conversation to continue without a new validation.
When set to COR+ANI, a new valid ANI will also be
required to keep the repeater open.
COR Reset hang timer if COR goes active
before the hang time expires.
COR+ANIRequire both COR and an ANI (or
valid User ID) to reset the hang timer
before expiration.
5.5.7.5 Repeater Out setting
This setting specifies which output is used to put the
repeater into transmit mode when Repeat Control is
enabled.
PTT PTT output used to key repeater in
Repeat Control mode.
MONITOR MONITOR output used to key repeater
in Repeat Control mode.
5.5.8 STATUS SETUP menu
5.5.8.1 Status Feature option
When enabled, the Status Feature always treats the
last digit of an incoming ANI as a status digit. The last
digit of the ANI is not actually displayed. Instead the
user's ANI and Status Message are displayed
alternately (every 2 seconds).
When the Status Feature is enabled, it will be required
that all units send an extra digit after their ANI. See the
section on Status Display Feature for more
information.
OFF Disable status feature.
ON Enable status feature.
5.5.8.2 Emergency Status option
When enabled, the Emergency Status option treats
any ANI with 9 as the last digit as an Emergency ANI.
When an Emergency ANI comes in, the PWR-ALM
LED flashes rapidly between green and orange.
Optionally, the Emerg Siren sound can be enabled to
alert the system operator of the emergency situation.
The Emergency Status option may be used alone, or in
conjunction with the Status Feature option. When
used alone, the digit '9' will appear and the status
message is not displayed. Also, the User Name in the
database will not be properly displayed.
When used in conjunction with the Status Feature, the
'9' will not be displayed. Instead, Status 9 Msg will be
displayed (unless it is blank), alternating with the ANI.
The User Name in the database will be properly
displayed.
OFF Display ID’s not in database.
ON Ignore ID’s not in database.
5.5.8.3 Status 0 Msg setting
Allows you to specify the status message displayed
when using the Status Feature. When using this
feature, the last digit of the ANI will be used to
determine the status. There is a status message for
each of the digits 0 through 9. Each status message
may be up to 10 alphanumeric characters.
Range: 0-10 characters
Default: blank
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MIDIAN ELECTRONICS INCORPORATEDPAGE 13
5.5.8.4 Status 1 Msg setting
See Status 0 Msg setting above.
Range: 0-10 characters
Default: blank
5.5.8.5 Status 2 Msg setting
See Status 0 Msg setting above.
Range: 0-10 characters
Default: blank
5.5.8.6 Status 3 Msg setting
See Status 0 Msg setting above.
Range: 0-10 characters
Default: blank
5.5.8.7 Status 4 Msg setting
See Status 0 Msg setting above.
Range: 0-10 characters
Default: blank
5.5.8.8 Status 5 Msg setting
See Status 0 Msg setting above.
database will not be affected.
5.5.9.2 Clear Database
This will clear the user database of all ID's and User
Names. The contents of the other parameters listed
above will not be affected.
5.5.9.3 Factory Debug
This is used by the factory for product testing. Do not
select this function unless directed to do so by
Midian Technical Support. Damage to the unit may
result.
Range: 0-10 characters
Default: blank
5.5.8.9 Status 6 Msg setting
See Status 0 Msg setting above.
Range: 0-10 characters
Default: blank
5.5.8.10 Status 7 Msg setting
See Status 0 Msg setting above.
Range: 0-10 characters
Default: blank
5.5.8.11 Status 8 Msg setting
See Status 0 Msg setting above.
Range: 0-10 characters
Default: blank
5.5.8.12 Status 9 Msg setting
See Status 0 Msg setting above. Note that this status
message is associated with emergency status.
Range: 0-10 characters
Default: blank
5.5.9 UTILITIES menu
5.5.9.1 Reset Defaults
This will reset all the parameters listed above to the
factory default settings. The contents of the user
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PAGE 14 MIDIAN ELECTRONICS INCORPORATED
6 SYSTEMERRORMESSAGES
CHANNEL BUSY
Reason: An attempt was made to transmit or make a
call on a busy channel with busy lockout enabled.
Solution: Wait until the channel is clear before
transmitting.
DATABASE EMPTY
Reason: An attempt was made to edit or delete a user
when the database was empty.
Solution: These functions do not apply when the
database is empty.
DATABASE FULLReason: An attempt was made to add a user to the
database and there is no more room. The maximum
number of user aliases of 137 cannot be exceeded.
Solution: Remove any old user names that are no
longer in service. If this is not possible, contact Midian
to learn about our Computer Aided Dispatch (CAD)
fleet management systems which can handle many
more users.
DATABASE ERRORReason: One or more entries in the user database has
been corrupted. This can happen if power is lost at the
exact time the database is being updated. Any
corrupted records will be blanked-out and must be reentered.
Solution: Cycle power to the unit. This should clear the
error. If the error message continues to come up,
contact Midian technical support.
DUPLICATE IDReason: An attempt was made to add a user ID to the
database which is already in the database. Each user
ID in the database must be unique.
Solution: Choose a unique user ID for each user. If it is
necessary to edit the user record, use the edit menu.
EE CHKSUM ERRReason: The configuration settings stored in EEPROM
have been corrupted. This can happen if power is lost
at the exact time a parameter is being updated. All
configuration settings will be set back to defaults. The
user database should not be affected.
Solution: Cycle power to the unit. This should clear the
error. If the error message continues to come up,
contact Midian technical support.
EE WRITE FAILReason: The EEPROM chip or connections to it have
failed.
Solution: Contact Midian for instructions on getting the
unit repaired.
FIELD IS BLANKReason: An attempt was made to place a call, but the
user ID or name was blank. An a ttempt was made to
spy or kill and the respective field in the database is
blank.
Solution: When placing a call, be sure an ID number or
user name is displayed before pr essing <SEND>. The
spy and kill functions require there be an entry in the
respective field of the user database.
MODEM TIMEOUTReason: The DDU expects a call to be completed
within 4.5 seconds and this time has been exceeded.
This can happen if the total of the key-up delay and
tone widths exceed 4.5 seconds. This can also happen
when used in a trunking system and a channel cannot
be acquired. It is also possible that there could be a
hardware failure.
Solution: If total time of the key-up delay and signaling
tones exceeds 4.5 seconds, simply press <SEND> to
clear the message from the display. The call will still be
sent. If the timeout is caused by excessive channel
acquisition time in a trunking system, press <SEND> to
clear the error and try placing the call again. In the
event of a hardware failure, contact Midian technical
support to determine if that is the cause.
NOT FO
eason: There is no entry in the user database that
R
matches the data entered.
Solution: When selecting a user to call, the name or
the ID can be entered in whole or in part. When
entering a partial name or ID, press the right
<SCROLL> button to search the database for the first
partial match. Press <SEND> only if the whole ID or
name has been entered. There may be no entry in the
database that matches in whole or in part. In that case,
the user must be added to the database.