MDS 05-3627A01, Rev. D
LEDR Series I/O Guide
55
This command briefly sounds the radio’s piezo buzzer for testing. It
should be used only from the
CONSOLE
Port.
Example Response:
buzzer: Starting test
buzzer: Test complete
clkmode
Clock Mode (Subrate Radios Only)
Usage:
clkmode [<internal|exttx|looped|extdce>]
This command displays or sets the source of the radio’s transmit clock.
For synchronization purposes, several different clocking schemes can
be used. See
for the combinations of radio band-
width, data rates and modulation types that are available for subrate
radios.
shows the combinations available for full
rate radios.
Subcommands:
internal
—Internal oscillator sources TC; RC derived from far end
of radio link (default).
exttx
—ETC accepted from external equipment on EIA-530 inter-
face; RC derived from far end of radio link.
looped
—Recovered RF (RX) clock; TC is synchronized to RC;
RC is derived from far end of radio link. Note: Do not use looped
clocks at both ends of any radio link.
extdce
—ETC and ERC are accepted as inputs on the EIA-530
interface.
NOTE:
Earlier versions of the software may display the Clock Mode
as
NORMAL
instead of
INTERNAL
.
Firmware Version 2.4.0 and Later – Use the
clkmode
command to
determine which port has been selected to drive the timing at the inter-
face.
Firmware Version 2.3.1 and Earlier – This command allows the var-
ious possible clock sources to be prioritized. As timing sources become
available, the highest-priority source will be chosen by the system. If
attaching to the network or equipment that provides timing, a universal
form of the command would be
clkmode 1 2 3 4 internal
. If attaching to
equipment that will provide looped-back timing, a universal form of the
command would be
clkmode remote internal
. If both ends of the link pro-
vide looped timing, the internal clock source should be selected at one
end by entering
clkmode internal
. Note that at least one end of the link
should have either network or internal timing selected.
530
E1
FT1
