M1XRFEG Installation Manual
Page 7
Handling Received Transmissions:
Operationally when a transmitter signal is received by the M1XRF it quickly scans through a filter of valid transmitter sensors
to determine if it that sensor has been enrolled into the M1 or EZ8 control. If that transmitter is valid then its data will be sent
to the M1 Controller for additional processing. The M1 Controller automatically informs any additional M1XRF Receivers that it
has received this transmitter, just in case they also heard the same transmission. This handling procedure does two things.
It eliminates duplicate signal processing while allowing multiple receivers for improved range and reliability. It also helps
prevent unwanted or neighboring transmitters belonging to another system from being duplicated on the data bus.
Operation
Diagnostic LEDs:
Three (3) Status LEDs provide valuable information as to the operation of the M1XRF:
BUS STAT "STATUS"
RED
LED - This displays multiple conditions as outlined below:
OFF = No Power to the M1XRF
ON Solid = The M1XRF is Not Enrolled or the Microprocessor is not functioning.
BLINKING = 2 different blink rates:
- Normal Operating mode - indicated by a slow blink of once per second with a matching Off time.
- Bootloader mose - indicated by a more rapid "two" blinks per second with a very brief Off time.
This occurs when the unit is awaiting a flash download of its application firmware. Until the firmware
application has been successfully downloaded the M1XRF is non-functional as a wireless receiver.
RXD "VALID"
GREEN
LED - This LED will momentarily turn on when the M1XRF receives a valid transmitter and is in the
process of sending the signal packet back to the M1 Controller. As soon as the packet is acknowledged by the M1
Controller the LED will turn Off.
REC'D "RF"
YELLOW
LED - This LED blinks whenever and RF transmitter signal is detected.
Requirements for Programming the Receiver and Enrolling Transmitters:
The Receiver and wireless transmitters may be programmed using either the M1 Keypad Installer Programming or the ElkRP
Remote Programming software. The following pages document the options and steps for programming from the keypad.
Transmitter (RF) Level Checking [Signal Strength]:
Wireless transmitters send multiple repeats "or rounds" of their data transmission packets to compensate for interfer-
ence, weak signal, etc. The repeated packets are useful to the receiver in providing level checking [signal strength, walk
test, etc.} as a reference of the acceptable reliability of the sensor and it's mounting orientation and/or location.
When the M1XRF receiver first hears a wireless transmission, it tracks and totals the number of received data packets
over the next 10 seconds. During keypad enrollment of a new transmitter, the total number of received packets is voice
announced by the M1 immediately following the successful enrollment. The number is also voice announced during the
Keypad Walk Test of a Wireless zone. For Example: If all data packets from a sensor (8 out of a total of 8) were
properly detected you should hear "Sensor X, Level 8". This would indicate the highest signal strength for this particular
Intrusion Sensor.
In Elk's opinion, the minimum acceptable level of any wireless sensor would generally be a level 4. This is based on
the fact that the M1XRF Receiver REQUIRES a minimum of 2 repeated data packets in order to qualify an event as a
valid transmission. Level 4 is just a rule of thumb based on doubling the minimum required number of repeated data
packets. It is the responsibility of the installation company and their technicians to adopt their own policy of what
should constitute a minimum acceptable level [signal strength] of any wireless transmitter.
IMPORTANT: Because the M1XRF counts all valid data packets received over a 10 second time window, it is possible
to occasionally hear a number that is much higher than the number you might expect to hear from a particular sensor.
This can occur when multiple transmitters on a site happen to transmit at the same time as the one being tested.
Based on the type of RF sensor being tested, if the announced value is too high or just sounds wrong or inconsistent, ,
it is recommended that you retest or retrigger that sensor to get a more correct data packet decode level.
