1. Keypad.

2. LCD.

3. Removable accessory tray.

4. D-cells battery holder.

5. Optional Lithium-Ion rechargeable battery pack.

6. Power key : Switches the unit on and off. Opens the transmitter menu.

7. Frequency key : Selects frequency. Menu navigation key.

8. Up and down arrows : Adjusts the output signal level. Scrolls through the menu options.

9. Measure key : Used to take voltage and impedance measurements. Opens a sub menu.

10. Battery icon: Indicates the battery level.

11. Alphanumeric description of selected operation mode.

12. Standby icon: Appears when the transmitter is in Standby Mode Output level: Displays transmitter output power.

14. Accessory or Measurement indicators: Indicates if an accessory is connected or if measure mode is active

15. DC icon: Appears when the transmitter is powered from a DC source

16. Induction indicator: Appears when the transmitter is in Induction Mode

17. A-Frame (Tx-5 or Tx-10 only): Indicates when the transmitter is in Fault-Find Mode

18. Voltage warning indicator: Indicates that the transmitter is outputting potentially hazardous voltage levels

19. Volume icon: Displays the volume level

• Tx-1, Tx-5 and Tx-10