GE 900 MHz, Reference Manual

Page: 71 / 100

MDS 05-2708A01, Rev. F MDS TransNET Ref. Manual 59
9.5 Using the Radio’s Sleep Mode (
Remote Units Only)
In some installations, such as at solar-powered sites, it may be necessary to
keep Remote transceivers’ power consumption to an absolute minimum. This
can be accomplished using the radio’s Sleep Mode feature. Power consump-
tion in the sleep mode will be less at higher voltages and more at lower volt-
ages. Power in the Sleep Mode at 13.6 Vdc is approximately 3 mA.
Sleep Mode can be enabled under RTU control by asserting a ground (or
EIA/RS-232 low) on Pin 4 of the radio’s
DATA
connector. All normal func-
tions are suspended until it is awakened. The radio stays in Sleep Mode until
a built-in one-minute timer “awakens” it for resynchronization, or the low is
removed from Pin 4.
When Pin 4 is opened (or an EIA/RS-232 high is asserted), the radio will be
ready to receive data within 75 milliseconds or less. The radio can be awak-
ened more often if desired, by your RTU.
NOTE:
The
SLEEP
function must be set to
ON
; without this, a ground on Pin 4 will be
ignored.
Table 23. Configuration Parameters for SAF Services
Remote Radio(s)
Parameter Command Description
Operating Mode MODE R
Details Page 36
Sets the radio to serve
as a Remote station.
Network Address ADDR
Details Page 29
A number between 1
and 65,000 that will
serve as a common
network address or
name.
Same number for all
units in the same net-
work.
Primary Extended
Address XPRI
Details Page 44
XADDR number of the
primary or preferred
radio with which this
radio will synchronize.
Extension Map XMAP
Details Page 44
Lists all XADDR val-
ues with which this ra-
dio can synchronize,
excluding the
XPRI
address.
Extension
Received Signal
Strength Indicator XRSSI
Details Page 44
The minimum RSSI
level required to pre-
serve synchronization
with a non-primary ra-
dio. (Ineffective when
XPRI
is
NONE
)