38 MDS 4710B/9710B I/O Guide MDS 05-3316A01, Rev. E
7.4 Bench Testing Set-up
Figure 17 shows a sample test setup that can be used to verify the basic
operation of MDS x710B radios. This test can be performed with any
number of remote radios by using a power divider with the appropriate
number of output connections.
The RTU simulator shown in the test setup (MDS Part No. 03-2512A01)
is a microcontroller that emulates a remote terminal unit operating at
1200, 2400, 4800, or 9600 bps. Custom software is supplied with the
RTU simulator that allows continuous polling of remote radios. The
software reports the number of polls sent, polls received, and the number
of errors detected. The software runs on an IBM-compatible personal
computer connected to the
DIAGNOSTICS port on the master station.
It is very important to use attenuation between all units in the test setup.
The amount of attenuation required depends on the number of units
being tested and the desired signal strength (RSSI) at each transceiver
during the test. In no case should a signal greater than –50 dBm be
applied to any radio in the test setup.
Invisible place holder
Figure 17. Bench test set-up
CAUTION
POSSIBLE
EQUIPMENT
DAMAGE
ANTENNA
13.8
VDC
+
–
ANTENNA
13.8
VDC
+
–
ANTENNA
1
3
.8
VDC
+
–
ANTENNA
1
3
.8
VDC
+
–
POWER ATTENUATORS
• Fixed or adjustable
• 5W Minimum Rating
POWER DIVIDER
NON-RADIATING ATTENUATOR
• Install on any unused divider ports
• 5W Minimum Rating
COMPUTER RUNNING MDS
"POLL.EXE" PROGRAM
RTU SIMULATORS
MDS P/N 03-2512A01
MASTER STATION
REMOTE
REMOTE
REMOTE
SIDE B
POWER
ORDER
WIRE
REMOTE
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