Read LED – Flashes green when an RFID transponder is in range of the antenna. See the table below.

Read LED	Read LED time duty cycle	Notes
Off	None	Not reading
On	Flashes every cycle when a tag is in range	Cycle time is depending on duty cycle is set to. For eg. 80:20   40:20   50:50

Exciter LED – Flashes red to let you know the transmitter is on. See the table below.

Exciter LED	Exciter Led time duty cycle	Fault	Notes
Constant flashing	Constant 80/20, 40/20 or 50/50 flashes		Transmitting in Slave Mode
Constant with 1 long flash	Constant cadence pulse + long flash every 20 cycles for 10 cycles		Transmitting in Master Mode
Constant with off periods	Constant flash with 200ms off every 2 seconds		Transmitting in wireless sync mode
1 flash per second	1 Short flash every 10 cycles (1 second in 80/20 mode)	Phase sync not locked	Attempting to lock phase sync with other RM4s

High Noise LED – Illuminate is orange when high background electrical noise is detected. This will reduce equipment performance and likely cause missed reads. See the table below.

High Noise LED	High Noise time duty cycle	Fault	Notes
Off	None
On	On solid	High Noise Detected	This is set to 50 by default but can be changed. Variable 202

All LEDs flashing together

All LEDs	All LEDs time duty cycle	Fault	Notes
All 4 LEDs flashing together	All LEDs flashing together every 500ms	Master module not connected	Error communicating with master module or no address received
All 4 LEDs flashing in sequence	Each led flashes one after each other		Bootloader mode or no valid firmware programmed

NX-M User interface & LED

NX-M menu

Icon	Description
Tools	Where system reports, electrical noise, system updates, factory reset, RM4 configurations and touch screen settings are performed.
Session	Where file setup, matching and lookup operations, and session information management can be performed
Read setup	Where tag filters, alerts, storing and sending tag information settings are done.
System setup	Where system operations such as communication, power, system basic configuration, date/time and relays are being set
Reader information	Provides reader software, hardware, OS versions, device name, and conformance details.

Quick overview into the what’s in the sub menus

Turning on Bluetooth

If the Bluetooth has been turned off you can turn it on via the Menu.

To turn on Bluetooth:

Go to Menu > System Setup > Comms > Bluetooth, then enable it using the top right button.

 Clearing the Memory

To perform a complete memory clear (recommended every 6 months):

Go to System Setup > Memory, then click the Erase Memory button.
Note: All tags will be permanently deleted and will NOT be recovered.

Tools and Diagnostics

The tool includes a useful feature called Noise that provides a real-time overview of all readers connected to the NX-M, including any NX-R readers linked through the R-Net.

Noise Graph: If you press on the Noise value, it will open the screen below

Displaying RM4 information on the NX-M display

Checking noise from the display

<10	Very Quiet – No reduction to read performance.
10-30	Slight Noise – Usually no reduction to read performance.
30-50	Little reduction to performance. Might start to 1-5% of reads.
50-70	Reduction to performance. Will miss 5-25% of reads.
70-90	High reduction to performance. Will miss up to 25- 50% of reads.
90-99	Very High reduction to performance. Will miss more than 50% of reads.