This includes the models below from Leica:
TCR303,TCR305,TCR307
Click the link below for a PDF document with screenshots:
Leica_TCR307.pdf
In Step # 3 make sure to set it to the "CR_LF" option {don't use just "CR"}
***On the TCR307 to access the settings in the instrument:***
1) Press [SHIFT] then [PROG] to get to the MENU screen
2) Highlight ALL SETTINGS and press [ENTER]
3) Highlight SYSTEM SETTINGS and press [ENTER] and set it to Data Output: RS-232
(if it shows Int. Mem. highlight it and use the arrow keys)
tap the [SET] button
4) Highlight COMMUNICATION and press [ENTER] and set it for the values below:
1. Baud --> 19200
2. Databits --> 8
3. Parity --> None
4. Endmrk --> CR/LF {if its on CR hit Arrow Right ->}
5. Stopbits --> 1
then tap the [SET] button
5) After filling out all the settings hit the red ENTER key to save the changes
6) hit ESC to return to the Measure screen
***In SurvCE 2.62 or higher:***
1) Go into Equip / Total Station
2) Set the Manufacturer to "Leica TPS Series (Direct)"
3) Set the Model to "TPS 300/400/800"
4) Tap the Comms tab and set it up for:
Type: Cable
Port: Com1
Baud: 19200 / Data Bits: 8 / Parity: None
5) Tap the "Settings" tab and select your FS Target and BS Target prism options
6) Tap the Green Check in the upper right to save your Changes