User Manual

ManualsBrandsSimoco EMEA ManualsElectronicsSB2025NT/Atlas 4100/ Atlas 4200/ Atlas 4300

SGD-SB2025NT-TUM, Part 1

Jan 12 Page 18 INSTALLATION & OPERATION

Table 5. DIP Switch 2 Settings.

SW 2 Function Description

Default

Select

1 PTT Delay

Enables 50 ms delay of PTT for use with simplex

function.

OFF

2 Simplex Enable Enables simplex function* ON

3 Tx Timer Sets programmable Tx time out timer on ON

4 Repeater Enable Enables repeater function* ON

5 Tx VCO on continuously

Switches Tx VCO on continuously. OFF

6 Scan on

Selects the Rx to enable the scanning of

programmed scan channels.

OFF

Note.

For the Repeater Enable functions, if the switch is ON and the channel is programmed

as a repeater channel (using MxTools) the SB2025 will act as a repeater. If the switch

is OFF the SB2025 will remain in full duplex mode even if the channel is programmed

as a repeater. The Simplex Enable operates in a similar way.

3.2.2.3 Select Operating Channel

The SB2025 has a channel capacity of 255. The RF and Continuous Tone Coded Sub-audible

Squelch (CTCSS) frequencies for each channel are programmed using the MxTools Channel

Information screen. There are two ways of selecting the operating channel.

1. DIP Switch 8-way. DIP switch SW1 provides a binary channel selection facility. When a

switch is ON it is read as a logical 1. When all switches are off the software channel select

mode is enabled.

2. Software Channel Select. If DIP switch SW1 is set to 0 (zero) then it is possible to send a

software command to the radio to select the channel.

The following rules apply.

Note.

The assumptions of logic levels are base on the factory default setup. The Active

state is Low.

DIP1 switches have priority over channel change. If any of DIP1 switches are set to ON (logic

low), the rear inputs and the software Channel command will be ignored.

If DIP1 switches are set to OFF (logic high), the software commands will select the channel.

3.2.2.4 Configure Alarms/M Lead

The SB2025 has three open collector outputs. Two of these are assigned as alarm outputs and

one (Output 1) may be configured as either an alarm output or an M Lead output. However,

Output 1 should be configured as an M Lead, this line is active when mute is open and

CTCSS/DCS (Digital Coded Squelch) is decoded. These outputs are assigned on the

Configuration screen of MxTools.

3.2.2.5 Configure Digital I/O

The SB2025 has 16 digital Input/Output (I/Os). These are configured using the ET.