Difference between TrimTalk / TrimMark; II, IIe, 450, 3

So what is the difference between:

• TRIMTALK 450S
• TRIMMARK II/IIe
• TT450(HW)
• TRIMMARK 3

protocol types?

There are 3 flavors of Trimtalk protocol. In most ways they are the same basic protocol. There are different bells and whistles:

• TT450(HW) is antiquated – fine tuned for an antiquated TT450 radio.
• Trimtalk II replaced it. But it only runs @ 4800 bps. If you select 9600 the radio probably switches to TT450S – but it doesn’t tell you this. Trimble surveying software does this switching a lot.
• TT450S is the next most modern flavor of the protocol. This is the one to use with non-ADL radios. It is the most compatible with radios as long as the radios were made in the last 15 years.
• Trimmark 3 is the latest version. It’s basically the same but it is tuned to run twice as fast. But it isn’t supported by PDL radios (only ADL.)

So, there you have it 🙂