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channel is blocked, the operator is requested by a short tone through the loudspeaker to enter
a new value. After the input is completed the channel change is transmitted automatically to the
channel interface. According to the conguration the operating channel or the old display content
is shown now on the left display.
Conguration
Units leaving the factory are congured for one digit channel selection. The channel output is in
"binary-1" format. If required, the channel selection can also be modied for two digit selection. In
case of single channel radio units the channel selection should be switched off. The channel output
can be in "decimal", "binary-1“, "binary“ or "2 * BCD“ format and the channel output can be inverted,
if necessary. In the following example a two digit channel selection is realized with inverted decimal
channel output. The channel will be displayed only for a short time.
Register 038
Value
1. digit
0 = No channel selection
2
1 = One digit channel selection
2 = Two digit channel selection
2. digit
1 = Channel output decimal
1
2 = Channel output binary-1
3 = Channel output binary
4 = Channel output 2 * BCD
5 = Channel remote control
3. digit
0 = Channel output normal
1
1 = Channel output inverted
4. digit
0 = Short channel display
0
1 = Permanent channel display
Channel Table
In the EPROM, starting with address 7B00H, a total of 100 bytes is reserved for the channel table.
Every single channel can be blocked by '00'H or released by 'FF'H. The table starts with channel 00
at address 7B00H and ends with channel 99 at address 7B63H. In units leaving the factory, channel
00 is blocked and all other channels are released.
Channel Scanning
Function
The scanner is activated by replacing the handset. It can be stopped at any time by switching on the
loudspeaker, by call transmission or by pressing the PTT button. In this case the channel entered
last (working channel) is switched. The area pre-programmed in the EEPROM is being scanned,
skipping those channels which are blocked according to the channel table. If a carrier is detected,
the scanner waits for one second for an incoming call and then continues with the scanning. If
a call is evaluated, the scanner waits for a programmable period of time (1 sec intervals) before
continueing. If the PTT or the call button is pressed during the waiting period, the scanner stops
at the calling channel and will remain there. The scanner can be activated again by replacing
the handset. The channel interface is programmed in register 038 (EEPROM 1). See section
Channel Selection (Conguration).