A.W. Communication Systems DRC1 Configuration Handbook - page 14
RX Vox Defeat Time
The line input to the DRC1 has a Voice Operated Switch (VOX), which removes from the
audio path constant line noise appearing on the line below the VOX level. The VOX switch is
defeated on incoming calls which produce audio above the VOX level, but if the vox where to
snap shut, pauses in speech may result in a fragmented message being heard. The defeat time
parameter sets how long the VOX hangs open after the incoming level drops below the VOX
threshold. The options are VOX off or delays in 2-second increments. Select [
menu
] to access
this item then use the scroll up/down keys to see the selection available. Press [
menu
] to
select the desired option, then, press [
clear
] twice to exit the menu system and implement the
changes.
MTRLA Function Keys.
This option permits the user to program the DRC-1 function keys to send Motorola signalling
functions to a Motorola base station. An explanation of the commonly used functions is given
later in this document. The options in order are:-
F1 to F4
function key set. Sets which Motorola function tone is allocated to the F1 to
F4 function keys.
Shift F1 to Shift F4
function key set Sets which Motorola function tone is allocated to
the Shift F1 to F4 function keys.
Talk through On tone
Sets which tone is used to put TT on.
Talk through off tone
. Sets which tone is used to switch off TT.
Squelch (mute) On tone
. Sets which tone is used to mute the RX
Squelch (mute) off tone
. Sets which tone will un- mute the RX.
Channels 1 to 4 setting tones
. Sets which tones are used to select channels 1 to 4.
Channels 1 to 4 PTT tones
. Allocates PTT tones to channels 1 to 4
Each of the above functions can also have a text message associated with it. In this way, the
operation of a function key to say change channel, will also output to the DRC-1 display
“ChN” to indicate the channel number switched to.
Press [
menu
] to select the MTRLA function menu, then use the scroll up/down to set the
desired item against the chevron. Press [
menu
] to select the item and two further choices now
exist.. Pressing the [
zero
] key will allow the programmer to scroll up and down the tone
frequency list to select which tone frequency is to be allocated to the function key in question.
Having placed the desired frequency against the chevron, press [
menu
] to store this value.
Now press the [
1
] key to enable a text message to be allocated to the function key. Using the
alpha-numeric keypad, each press will scroll through the alphabetical characters and numbers,
in a similar way as an SMS message is sent on your cell phone. Up to eight characters may be
entered. Press [
menu
] to store the entered text, then, press [
clear
] twice to exit the menu
facility.