3M Company BCSDXT1B Manuale Utente
Appendix: Best Practices
September 2012 – Revision 1.9 DRAFT
Page 56 of 66
3M™ Wireless Communication System Model XT-1
Installation Manual
Figure 20
Is PreAmp = 8
Is Echo
Canceller set
to Med ?
Echo/Delay Cancellation Flowchart
System with Echo/ Delay
Yes
No
No
No
No
No
No
No
Increase Echo
Canceller by 1
Canceller by 1
level up to Med
Note: System Optimized
for the 3M Mic
for the 3M Mic
Set PreAmp to 8, if
using the 3M Mic.
using the 3M Mic.
Did Echo
Disappear?
Adjust volumes to
reasonable levels
reasonable levels
Are volumes
reasonable at the
order point?
Not a Base
Station Setup
issue
System working
without Echo/Delay
without Echo/Delay
Did Echo
Disappear?
Has the Order point
been properly
acoustically treated?
Acoustically
treat/isolate Mic.
And Spkr as needed
treat/isolate Mic.
And Spkr as needed
Replace Mic., Spkr
or cable
or cable
New Mic, Spkr,
Cable?
Note: Need to eliminate mechanical or
internal order point coupling. I.E. Mechanical
vibrations from the speaker or sound from
within the order point is passing into the
microphone. This needs to be prevented by
isolating within the order point. Acoustical
foam can be used to do this.
internal order point coupling. I.E. Mechanical
vibrations from the speaker or sound from
within the order point is passing into the
microphone. This needs to be prevented by
isolating within the order point. Acoustical
foam can be used to do this.
Note: Concentrate on
outbound volume level, if it
is too loud it may cause the
system to Echo or Delay.
outbound volume level, if it
is too loud it may cause the
system to Echo or Delay.
Yes
Yes
Yes
Yes
Yes
Yes