RELM Communications Inc SRU50ABC ユーザーズマニュアル
S Series Repeater USER MANUAL
©RELM Communications Inc. Revision 1.0
22
Software Channel Select via Utility Program: First ensure that channel 0 is selected on the DIP switch DIP1 located
on the Micro Controller Board (all 8 switches in the off position). Enter the channel number in the Software Select
Channel window on the Channel Info screen and press Select.
on the Micro Controller Board (all 8 switches in the off position). Enter the channel number in the Software Select
Channel window on the Channel Info screen and press Select.
Software Channel Select via Serial Command: First ensure that channel 0 is selected on the DIP switch DIP1
located on the Micro Controller Board (all 8 switches in the off position). Send the string "chansXXX" where XXX
= a 3 digit number for the channel number. eg To select channel 5 send the string "chans005". Baud rate is 9600
BPS.
located on the Micro Controller Board (all 8 switches in the off position). Send the string "chansXXX" where XXX
= a 3 digit number for the channel number. eg To select channel 5 send the string "chans005". Baud rate is 9600
BPS.
Hardware Channel Select: Select the fixed channel for the SR35/50 by using the DIP switch DIP1 located on the
Micro Controller Board. Channel 1 to 255 is available in binary selection. Switch position 1 is channel 1, position 2
is channel 2, position 3 is channel 4, position 4 is channel 8, position 5 is channel 16, position 6 is channel 32,
position 7 is channel 64, position 8 is channel 128. For further details of all possible channels see APPENDIX C.
Micro Controller Board. Channel 1 to 255 is available in binary selection. Switch position 1 is channel 1, position 2
is channel 2, position 3 is channel 4, position 4 is channel 8, position 5 is channel 16, position 6 is channel 32,
position 7 is channel 64, position 8 is channel 128. For further details of all possible channels see APPENDIX C.
Troubleshooting
The most common causes of problems are listed below.
Incorrect parameters set in SR35/50 Utility Program such as
1. Wrong Reference frequency oscillator value.
2. PLL correction factor or Bin Accel value too low.
3. Accel values extreme.
4. Channel spacing value not correct.
5. Frequency value is not a multiple of the channel spacing / step size.
1. Wrong Reference frequency oscillator value.
2. PLL correction factor or Bin Accel value too low.
3. Accel values extreme.
4. Channel spacing value not correct.
5. Frequency value is not a multiple of the channel spacing / step size.
Other problems may include Jumpers or DIP switches in wrong positions
Glossary
3RD OIP
Third Order Intercept Point
4LFSK
4 Level Frequency Shift Keying
APCO-25
Associated Public-Safety Communications Officers, Inc. Project 25
AUX
Auxiliary
BPF
Band Pass Filter
BW
Bandwidth
CMOS
Complementary Metal Oxide Silicon
CRO
Cathode Ray Oscilloscope
CTCSS
Continuous Tone Coded Squelch System
DC
Direct Current
DIP
Dual Inline Package
DDS
Direct Digital Synthesis
DSP
Digital Signal Processor
EMI
Electro Magnetic Interference
FSK
Frequency Shift Keying
HPF
High Pass Filter
IC
Integrated Circuit
IF
Intermediate Frequency
I/O
Input / Output