P
AGE
10
M
IDIAN
E
LECTRONICS
I
NCORPORATED
DDU-100/200
Manual
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 off-
hook or monitor).
NONE
No microphone.
GOOSENECK
Gooseneck style microphone.
PADDLE
Paddle style desktop microphone.
HANDSET
External handset.
5.5.3.5 Printer
Option
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.
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.
Range:
4 digits
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.
ON
Do 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.
LOW
Radio is squelched when the Squelch
Output. Is brought to GND.
HIGH
Radio is squelched when the Squelch
Output is
not
at GND (floating).
5.5.5.5 Auto Mute Time setting
Specifies the amount of time after the COR Input
