Wiring Transducer for Anti Crosstalk
Sultan Acoustic Wave Series
10
The term crosstalk is used to refer to interference between acoustic wave units of the same frequency
located near one another. The units can ‘hear’ direct or reflected signals from one another. This can cause
randomly false measurements and outputs whilst giving correct performance at other times.
Crosstalk is more likely to exist when there are multiple units in a small enclosed area with highly reflective
surfaces and with fast moving applications.
Wiring for Anti Crosstalk
1. Link all units to a common ground, or parallel connect their ‘GND’ or ‘DC-’ terminals.
*GND and DC- terminals are electrically connected inside Sultan 234 units, so either one may be used.
2. At each individual unit, wire a connection between a Relay (eg Relay 1) ‘Common’ terminal and the
‘TEST’ terminal of the same amplifier.
3. Wire a connection between the chosen Relay ‘Normally Open’ terminals of all units to be linked
(parallel connection of all units).
4. In the Output Adjust menu for each unit program the chosen Relay to ‘FS’ (Fail-safe) mode).
The units will now be linked so that they cannot crosstalk.
5. (UPDATE MARCH 2012). New release software includes an additional menu in the ‘Output Adjust’ section
called ‘test input’. The option ‘Synchronise’ improves the cross talk sequencing for larger amounts of units.
HAWK does not recommend more than 6 transducers in a single anti cross talk circuit.
AC INDC IN
-
+
L1
N
SULTAN 1
AC INDC IN
-
+
L1
N
AC INDC IN
-
+
L1
N
SULTAN 2 SULTAN 3
NC
RELAY1
COM
NO
COMMS
A
B
Test In
NC
COM
NO
COMMS
A
B
Test In
NC
COM
NO
COMMS
A
B
Test In
RELAY1 RELAY1
SULTAN 1 SULTAN 2 SULTAN 3
1.
2.
3.
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