User's Manual

42 MDS 9810 Installation and Operation Guide MDS 05-3301A01, Rev. C
R-M indicates that the transceiver has been programmed to the special
remote-master mode (remote radio operating on master frequencies)
This is used in repeater-assisted peer-to-peer systems; see Section 2.2,
Typical Applications (beginning on Page 3) for details. The
R-M mode
denotes a remote radio operating on master frequencies. In all other
respects, a remote-master behaves the same as a normal remote.
All units default to remotes; other modes must be specifically pro-
grammed with the
MODE command.
OWM [xxxxx]
The
OWM command sets or displays an optional owner’s message, such
as the system name. The entry can contain up to 30 characters.
OWN [xxxxx]
The
OWN command sets or displays an optional owner’s name, such as
the site name. The entry can contain up to 30 characters.
PWR [xx–30]
This command displays or sets the desired RF forward output power set-
ting of the radio. The
PWR command parameter is specified in dBm and
can range from 20 to 30 dBm in 1 dBm steps. The default setting is 30
dBm (1 watt). To read the actual (measured) power output of the radio,
use the
SHOW PWR command.
In the USA and Canada, maximum allowable power is governed by
limits on Effective Isotropic Radiated Power output (EIRP). The EIRP
limit of +36 dBm means that any user with a net antenna gain greater
than 6 dBi must decrease the
PWR setting accordingly. Section 3.5, How
Much Output Power Can be Used? (beginning on Page 13) contains a
detailed discussion of this topic.
RSSI
This command displays the radio’s Received Signal Strength Indication
in dBm (decibels relative to 1 mW). The output can range from –50 dBm
to –110 dBm. Command availability and results depend on the mode of
operation (master or remote). The closer to 0 dBm, the stronger the
signal, thus a reading of –70 dBm is stronger than –80 dBm.
For a remote radio, under normal operation, RSSI is based on the
average signal strength of the SYNC message received in each of the
eight frequency zones. (RSSI is sampled each time a SYNC message is
received—every 1.6 seconds.) When using the RSSI reading to align a
directional antenna, it is important to make changes slowly so that the
RSSI reading will provide meaningful results. It will take several sec-
onds to indicate a change in signal level. The radio stays in RSSI mode
until
is pressed.
ENTER