MDEV-900-NT Linx Technologies, MDEV-900-NT Datasheet - Page 12

• Manufacturer Part Number: MDEV-900-NT
• Description: RF Development Tools NT Series Dev kit w/ Transparent module
• Manufacturer: Linx Technologies
• Type: RF Transceiversr

Specifications of MDEV-900-NT

• Rohs: yes
• Product: Development Kits
• Tool Is For Evaluation Of: TRM-900-NT
• Frequency: 902 MHz to 928 MHz
• Operating Supply Voltage: 2.5 V to 5.5 V
• Interface Type: USB
• Factory Pack Quantity: 1

The Range Test Area
The board features an MT Series remote control transcoder with two push
buttons, a buzzer and an LED. The two boards in the kit are populated
differently so that the button inputs on one board are outputs on the other
board. Figure 9 shows the differences.
Board A
Board B
Figure 9: The Development Board Range Test Section
When a button is pressed on one board, the status of both buttons is
captured, encoded into a data stream, and transmitted. The data
recovered by the receiving board is decoded and the transcoder’s data
lines are set to replicate the states of the buttons, driving either the buzzer
or the LED. A confirmation packet is then sent to the transmitting board
activating the Confirm LED.
To activate this area of the board, the module’s DATA and T/R_SEL lines
must be routed to the transcoder. This is accomplished by setting the
Mode Select switch to the right position and the Evaluation Select switch to
the middle position.
After the boards have been configured, place Board A on a flat surface
and turn it on. Turn on Board B and press button S1. The buzzer on Board
A will sound and the Confirm LED on Board B will light up. The usable
range of the link in your environment can be ascertained by carrying Board
B away from Board A. Switch SW11 has been provided to continuously
transmit the LED activation without having to hold down a button.
As you near the maximum range of the link in your area, it is common for
the signal to cut in and out as you move. This is normal and can result from
other interfering sources or fluctuating signal levels due to multipath effects.
The areas in which this occurs are commonly called “nulls” and simply
walking a little farther will often restore the signal.
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