User's Manual

36 MDS TransNET I&O Guide MDS 05-2708A01, Rev. D
LED [ON, OFF]
Enable/Disable PCB LEDs
LED ON
enables/disables the PCB board mounted LEDs seen only with the
transceiver’s covers removed. LED is normally OFF, it may be useful to have
them on for testing the radio with the covers removed. Note: the external
LEDs will be dimmer if the LED function is left ON.
The LED command also affects the operation of the LEDs in the “Low-Power
Mode” (LPM). When LED is OFF, the radio keeps the PWR and SYNC LEDs
extinguished.
LPM [1, 0]
Low-Power Mode—Masters Only
This feature trades increased latency to gain power savings. Low-power
mode (LPM) automatically saves power at a Remote by instructing the
Remote to shutdown for large periods of time in between SYNC messages.
Master transmissions are automatically blocked while the Remotes are
asleep. Note, both Masters and Remotes are adaptive and will suppress a
normal sleep interval if data transmission or reception is in progress.
• LPM 1 at the Master enables low-power mode network-wide; all
Remotes pick it up and start saving power by automatically sleeping.
LPM 1 can work in conjunction with the AT dialing feature. The dialed
unit will be forced awake; all others will sleep.
• LPM 0 at the Master to disable low-power mode (Default setting).
The SLEEP command must be enabled for LPM to function. Further, when
you enable LPM, the LEDs on the Remote radio dim even though the LPM
function is not properly enabled by turning on SLEEP. For more information,
see “Low-Power Mode (LPM)—Master Enabled” on Page 60, and
“Low-Power Mode versus Remote’s Sleep Mode” on Page 62.
LPMHOLD [0–1000]
Low-Power Mode Sleep Time
Used to give an RTU time (0-1000 ms) to respond before the radio goes to
sleep. Value determines how long to suppress auto-sleep following reception
of the last character sent out of the RXD serial data port.
NOTE: Any values entered will be rounded to the nearest multiple of 4 ms.
To verify the exact hold time, enter LPMHOLD, the response will give you the
value currently being used.
MODE [M, R, X]
Radio Operating Mode
The MODE command sets or displays the operating mode of the radio. A
Master radio is set by MODE M; a Remote set by MODE R, and an Extension
is set by MODE X.