MDS 05-3301A01, Rev. C
MDS 9810 Installation and Operation Guide
47
SNR output ranges from 10 dB to 33 dB. A value of 10 dB represents
little or no signal. A value of 24 dB represents a very strong signal. For
remote radios, a value of 0 is reserved to mean “no signal”; it is dis-
played whenever a remote is not in synchronization with the master sta-
tion.
When the
SNR
command is used, it causes the
DIAG(NOSTIC)
port to
enter an update mode, and it will provide an updated signal-to-noise
ratio every 1.6 seconds. It stays in this mode until the
key is
pressed.
SREV
This command displays the software version currently loaded into the
transceiver.
A display of
06-3111A01, 3.5.1
is an example of the software version iden-
tifier.
STAT
This command is used to check alarm status. If no alarms exist, the mes-
sage
NO ALARMS PRESENT
appears at the top of the HHT display.
If an alarm does exist, a two-digit event code (00–31) is displayed and
the event is identified as a “major” or “minor” alarm. A brief description
of the event is also given.
If more than one alarm exists, the word
MORE
appears at the bottom of
the screen and additional alarms are viewed by pressing the
key. Detailed descriptions of the alarm codes are provided in Table 12
on Page 52.
TDD [ON/OFF]
The
TDD
command selects or displays whether or not the
DATA INTER-
FACE
port is operating in time division duplex (sometimes called “sim-
ulated full-duplex”) mode. This command is “read-only” at remote
radios.
The x810 Transceiver is physically a half-duplex device. The radio can
never actually transmit and receive RF data at the same time. However,
TDD mode enables the radio to simulate full-duplex at the data port, by
designating alternate hops as transmit or receive hops, and buffering
(storing) data when transmission is not permitted. Default operation is
TDD OFF
.
ENTER
ENTER
