TX application board DIP switches
The TX application board features an 8 way (S1) and a 4way (S2) DIP switches. The optional 4
way DIP switch which is used for parallel frequency channel select is only required when our multi
channel LM series radios like LMT1 / LMT2 s are used. The 8-way DIP switch is used to set an 8
bit (256 combinations) unit address.
CTA88 RX Application board
Outputs
8A 240V AC rated change over relay contacts (RLA1 – RLA8)
LED indicators on all 8 channels (D1 – D8)
Supply
12V (10-15V)
receive/idle current (depends upon radio module fitted)
23mA with LMR2-433-5 fitted
relay current 25mA per activated channel
Radio modules
any LMR version
receive only versions of NiM2, BiM1, BiM2A, BiM3 (any)
CVR1 (5V versions); RDL2 (rx)
RX application board jumpers and DIP switches
The RX encoder board has 2 jumpers and 2 DIP switches. As with TX board, the jumpers are used
to select the number of operating modes featured in the board while the 4 way and 8 way DIP
switches are used for frequency channels selection and address selection respectively.
Figure 4: CTA88 Decoder application board for BiM / LMR Receiver
Assumed the board is held "long side horizontal" with the RF and power connectors at the top
Jumper.
JP12
P13
Name
MODE
PGM
Function
Position
Mode
Select Operating mode
Radio setup (only for LM
series radios)
(see operating mode section below)
Ground (left) and the RS232 input
(right)
Radiometrix Ltd
CTA88 application board manual
page 4
RADIOMETRIX [ RADIOMETRIX LTD ]
