TZT 3 internal Sounder Frequency Selection

[Quitsa]

One thing that is still very unclear from the manual and other literature is whether it is possible to run the internal TZT 3 sounder in conventional 200/50 Hz mode if you have a CHIRP capable transducer. It seems to select the transmission mode based on the transducer iD so if you have a CHIRP transducer, it automatically transmits spread spectrum CHIRP. The only choice is LF or HF.

The "brand G" sounder frequency menu allows the user to select (using HF as an example) 200Hz, a custom fixed frequency anywhere in the range (160-250Hz), or high frequency CHIRP if it detects a CHIRP transducer. This is a nice feature and it would be a shame if G actually had something better than Furuno! It looks as though if you add the external DI-FFAMP, it is possible to use custom fixed frequencies but only if you have that hardware on the system. Is that right?

I don't know if this is a hardware or software issue. If it is software, maybe the guys in Japan could add frequency selection to their list of future improvements.

 

[kicker]

One thing that is still very unclear from the manual and other literature is whether it is possible to run the internal TZT 3 sounder in conventional 200/50 Hz mode if you have a CHIRP capable transducer. It seems to select the transmission mode based on the transducer iD so if you have a CHIRP transducer, it automatically transmits spread spectrum CHIRP. The only choice is LF or HF.

All of our CHIRP sounders have the ability to do CW mode and go into CW mode automatically for you (let our software do the work for you). At this time if you want to do it manually you’ll will need the DI-FFAMP box. But hey! good news, this is a new product and I am sure we will release future software updates and this feature might be added down the road. I will pass this information onto our Product Development team.

The "brand G" sounder frequency menu allows the user to select (using HF as an example) 200Hz, a custom fixed frequency anywhere in the range (160-250Hz), or high frequency CHIRP if it detects a CHIRP transducer. This is a nice feature and it would be a shame if G actually had something better than Furuno! It looks as though if you add the external DI-FFAMP, it is possible to use custom fixed frequencies but only if you have that hardware on the system. Is that right?

I don't know if this is a hardware or software issue. If it is software, maybe the guys in Japan could add frequency selection to their list of future improvements.

Let the sounder do the work for you. When CHIRP is out of its effective range, it will automatically go into CW mode for you. I will be sure to pass this information along.

 

[Quitsa]

Thank you. There are situations in which n my experience a specific CW frequency is the best option. For example, I would use 160 Hz trolling because it seems to do a better job with schools of pelagic fish. Bottom fishing in shallow water, I would use 235Hz.

It may be that the auto CHIRP on the new internal sounder does a better job than the selected frequencies I used with my old equipment. I am sure that a lot has to do with the particular transducers in use as well.

 

[kicker]

Makes sense, I totally understand what you're trying to do.

It might be the same transducer across the market but I think it's the software and hardware that Product Development and our Engineers design to process the data, is what makes Furuno fish finders one of the most dependable. May turn out that you don't need to adjust your settings too often and be able to do more fishing and have better results .

Do you use auto or manual gain for your FF?

 

[Quitsa]

Makes sense, I totally understand what you're trying to do.

It might be the same transducer across the market but I think it's the software and hardware that Product Development and our Engineers design to process the data, is what makes Furuno fish finders one of the most dependable. May turn out that you don't need to adjust your settings too often and be able to do more fishing and have better results .

Do you use auto or manual gain for your FF?

I have a small boat with a TZT 2 and a simple B60 transducer. That works very well in auto mode so I usually don't bother with manual adjustments except for things ike bottom zoom range.

My larger boat for offshore used to have the top of the line black box CHIRP sounder from a competitor. That required manual adjustments of gain and other parameters to get the best results using B175H and B175L transducers. A TZT 3 based system is being installed on that boat, which is almost done except for the displays that should come next week. We will be keeping the B175 transducers and at least initially see how well they work with the internal TZT 3 sounder.

 

[passionemarina]

Hallo Quitsa,
I also have two Furuno transducers, one for 50 Khz (50B-6B) and another for 200Khz (200B-5S), as you did in your bigger boat (diferent brand but same system with two transducers.

How did you connect them on you new TZT3?

My transducers only have only fuor pins each.

Thank you in advance

 

[Quitsa]

Hallo Quitsa,
I also have two Furuno transducers, one for 50 Khz (50B-6B) and another for 200Khz (200B-5S), as you did in your bigger boat (diferent brand but same system with two transducers.

How did you connect them on you new TZT3?

My transducers only have only fuor pins each.

Thank you in advance

We cut the 10 to 12 pin adapter cable that comes with the TZT 3 units and spliced the wires in the transducer cable to the cable on the 12 pin plug to goes to the port on the TZT 3. Since i have two TZT 3s, we connected the HF transducer to one and the LF transducer to the other using the pin assignment wiring diagram in the back of the manual. I think it might be possible to splice both transducers to a single 12 pin plug.

We did not want to experiment with that because my transducers have a TD-ID wire and there is only one TD-ID pin in the 12 pin plug. At the time of the installation, there was no Y cable available, which might be available now. The only downside to having the high and low frequency connected to two different TZT 3s on the network is that you cannot run a traditional side-by-side HF/LF view on a single display.