Measurement Computing WLS-TC - Manual (Page 23)

WLS-TC User's Guide Specifications
23
Mechanical
Table 14. Mechanical specifications
Parameter Specification
Dimensions (L × W × H) 128.52 x 88.39 × 35.56 mm (5.06 × 3.48 × 1.43 in.)
USB cable length 3 m (9.84 ft) max
LED / button configuration
Table 15. LED configuration
Parameter Specification
Command LED Green LED – indicates a command was received by the device (either USB or
wireless)
Received Signal Strength Indicator
(RSSI) LEDs Three green LED bar graph. The LEDs will turn on when receiving a wireless
message, and stay on for approximately 1 second after the end of the message.
These LEDs indicate the amount of fade margin present in an active wireless link.
Fade margin is defined as the difference between the incoming signal strength and
the device's receiver sensitivity.
 3 LEDs on: Very strong signal (> 30 dB fade margin)
 2 LEDs on: Strong signal (> 20 dB fade margin)
 1 LED on: Moderate signal (> 10 dB fade margin)
 0 LEDs on: Weak signal (< 10 dB fade margin)
Wireless Power LED Green LED: the internal RF module is receiving power.
Transmit LED Yellow LED: data is being transmitted over the wireless link.
Receive LED Red LED: data is being received over the wireless link.
Button Firmware defined; this revision executes an LED test.
Command
Wireless Power
Transmit
Receive
Received
Signal
Strength
Button
(firmware
defined)