Section 3
: Notes, Considerations and Examples
3.1
: Notes and Considerations.
Slowdown of Sounder:
You must keep in mind that utilizing the External KP function will
slow down the Transmission Rate of the Internal Sounder as well as the DFF3D or DFF3-UHD.
This will not impede function and is a normal condition. This occurs because the transmission
pluses of both the TZtouch3 MFD/DI-FFAMP and the DFF3D/DFF3-UHD will be staggered so
that they do not affect each other.
Primary and Secondary Modes:
In most applications, the DFF3D or DFF3-UHD will function
as the primary sounder. In some applications however, the internal sounder may be used as
well. In this scenario, when you turn on the KP Sync button, that unit is now listening for the
KP Sync signal (Secondary mode) to function. This means the DFF3-UHD is now
Listening
only
for the KP Signal, not
Sending
one. Please ensure
ONLY ONE
of the Fish Finders has this
selection turned ON, if both Fish Finders have KP Sync turned ON, neither Fish Finder will be
transmitting as both would be listening for a signal.
Heaving and Pitch/Roll Compensation Considerations:
With both the TZtouch3 MFD/DI-
FFAMP and the DFF3D/DFF3-UHD we can employ Heaving Correction (“Heave” or “HVE”) to
correct for excessive Heaving in rougher seas. This is done using the input from a Satellite
compass (Recommended installation) or, in the case of the DFF3D only, the built in motion
sensor in its transducer (for pitch/roll). In a larger system utilizing both the TZtouch3 MFD or
DI-FFAMP and the DFF3D or DFF3-UHD, the KP settings must be done correctly to make sure
correct HVE correction across all sounders. If one inputs the “HVE” sentence from the Satellite
Compass to the DFF3D, it will compensate regardless of KP Setting. To make this work
correctly, you must set it as follows:
DFF3D/DFF3-UHD: KP – “
ON
”
DI-FFAMP: KP – “
OFF
”
This puts the DFF3D or DFF3-UHD is Secondary mode and the DI-FFAMP in Primary Mode.
Further Information on Heaving Correction.
Summary of Contents for TZ3 touch
Page 1: ...KEY PULSE INTERFACING...
Page 14: ...11 Attach the shield cover and replace the plastic cover...
Page 24: ...Section 4 Interconnect Drawings 4 1 DFF3D to DI FFAMP...
Page 25: ...4 2 DFF3 UHD to DI FFAMP...
Page 26: ...4 3 DFF3D to TZT3...
Page 27: ...4 4 DFF3 UHD to TZT3...
Page 31: ...Push the MENU ESC and use the Roto Key to scroll down to the System Settings...
Page 33: ...Then select for ON...
Page 34: ...For KEY PULSING OUT select Out Trigger Then select either HF or LF...
Page 35: ......
