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
17
Testing
The following equipment is required to test SR35/50 series radios:
•
A Radio communications test set with 600
Ω interfaces.
•
A digital multimeter.
•
An oscilloscope.
•
13.8V Power Supply.
•
A PC compatible personal computer with at least 8Mb of RAM, a serial port and the "SR35/50 Base Station
Utility" software installed.
Utility" software installed.
•
A suitable cable to connect the serial port of the PC to the SR35/50 radio’s RS-232 port. The details of this cable
can be found in Appendix B.
can be found in Appendix B.
•
A suitable power lead as supplied with the radio is being tested.
•
Suitable low loss RF cables and connectors.
WARNING: Attempting to operate the transmitter without an appropriate load
connected to the RF output may cause physical damage to the unit and void
the warranty. Please contact RELM Communications if you are in any
doubt about the suitability of your test environment.
the warranty. Please contact RELM Communications if you are in any
doubt about the suitability of your test environment.
Connecting a computer to the SR35/50 radio.
The standard cable used to connect the computer to the SR35/50 is a serial "Lap-Link" type cable. This usually
consists of a lead with a DB9 and DB25 female connector at each end. The Rx and Tx data signals are cross
connected in "Lap-Link" type cables. There are two jumper links on the Micro Controller circuit board inside the
SR35/50 designated JMP10 and JMP11, their default position is pin 2&3 or "SWAP". This indicates that a lead
which swaps Rx and Tx data is in use.
consists of a lead with a DB9 and DB25 female connector at each end. The Rx and Tx data signals are cross
connected in "Lap-Link" type cables. There are two jumper links on the Micro Controller circuit board inside the
SR35/50 designated JMP10 and JMP11, their default position is pin 2&3 or "SWAP". This indicates that a lead
which swaps Rx and Tx data is in use.
Other special serial leads can also be used. In order to allow for more combinations you can set JMP10 and JMP11
to position 1&2 or "NORM" which has the effect of swapping over pins 2 and 3 on the DB9 rear connector.
to position 1&2 or "NORM" which has the effect of swapping over pins 2 and 3 on the DB9 rear connector.
Test Setup
All connections are made at the rear of the SR35/50.
Connect the Transmitter RF output located on the heatsink module to the dummy load / Tx test input of the Radio
Communications Test Set using a short length of low loss RG 213 or equivalent coaxial cable.
Communications Test Set using a short length of low loss RG 213 or equivalent coaxial cable.
Connect the Receiver RF input to the Signal Generator output of Radio Communications Test Set using moderate to
low loss coaxial cable.
low loss coaxial cable.
Connect all VF interfaces' and control lines to the appropriate points.
Connect the SR35/50 Radio to a suitable 13.8 Volt DC power supply while observing the correct polarity.