User's Manual

MDS 05-3301A01, Rev. C MDS 9810 Installation and Operation Guide 45
When the SETUP command is entered, the HHT prompt changes to
SETUP>, and:
• Hopping is disabled.
• Synthesizer frequencies are reset to the test frequencies speci-
fied by the
TX and RX commands.
• The radio can be keyed using the
KEY command. DKEY is used
to unkey the radio. (If the radio is left in a keyed state it is auto-
matically unkeyed after several minutes.)
• The
RSSI is sampled in a raw, continuous fashion regardless of
whether the unit is a master or a remote.
Entering Q or QUIT returns the system to normal operation.
A timer keeps the Setup mode from accidentally leaving the system dis-
abled. After 10 minutes the system behaves as if
Q or QUIT had been
entered, returning to normal operation.
SHOW [PORT, DC, PWR]
The
SHOW command displays three types of information based on the
command variables. These are:
•
PORT—Displays which connector port (RJ-11 or DB-25) is cur-
rently active for diagnostics and control.
•
DC—Displays DC input/output voltages.
•
PWR—Displays the actual (measured) RF power output in dBm.
Unlike the
PWR command, this command shows the actual level
being measured, not the programmed RF power setting.
SIMPLEX [ON, OFF]
The
SIMPLEX command sets or displays the radio’s mode of operation
(simplex or half-duplex).
By default, the system operates in half-duplex mode (
SIMPLEX OFF). In
this mode, the transmit frequency of the master is the receive frequency
of the remote (and vice-versa). The transceiver uses a transmit/receive
frequency split of ±1.6 MHz. The offset varies such that both frequen-
cies will always fit within the same zone. (A zone is a 3.2 MHz
sub-band—see the
ZONE DATA command.)
When simplex mode is selected (
SIMPLEX ON), the master and remotes
always transmit and receive on the same frequency. This setting is
required for peer-to-peer simplex networks where remotes must be able
to communicate with other remotes. A slight increase in end-to-end
delay will occur when using this mode.
This command is “read-only” at remote radios. (Remotes must be syn-
chronized with the master radio to read the simplex status.)