Comtech EF Data CDM-500 User Manual

Page 79

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Remote Control

CDM-500 Closed Network Satellite Modem

B–14

Rev. 1.3

Parameter
Type

Command
(Instruction
Code and
qualifier)

Arguments
for Command
or Response to
Query

Description of arguments
(note that all arguments are ASCII numeric codes,
that is, ASCII codes between 48 and 57)

Response to
Command (target to
controller)

Query
(Instruction
Code and
qualifier)

Response to
query (target
to controller)

Power level
DAC set

DAC= 4

bytes,

numerical

FACTORY USE ONLY
Modulator power output DAC setting. An argument
between 0000 and 4095 is required
Example: DAC=1287
(Used for power-level calibration)

DAC= (message ok)
DAC? (received ok,
but invalid arguments
found)
DAC* (message ok,
but not permitted in
current mode.

DAC? DAC=xxxx

where xxxx is a
value between
0000 and 4095

Write
EEPROM
Value

EWR=

7 bytes

Command only. FACTORY USE ONLY
A command in the form ddd,aaa, where ddd is a
single byte data value between 0 and 255, and aaa is a
starting address (in the range 0 - 127) within the serial
EEPROM, where the data is to be written.
Example: EWR=127,104 means write the value 127
starting at address location 104.
(Used for power-level cal, amongst other things)

EWR= (message ok)
EWR? (received ok,
but invalid arguments
found)
EWR* (message ok,
but not permitted in
current mode

N/A N/A

Read
EEPROM
Value

N/A

3 bytes

Query only. FACTORY USE ONLY
A query in the form aaa where aaa is a starting bit
address (in the range 0 - 127) within the modem’s
serial EEPROM, requesting that the byte stored at that
location be returned.
Example: ERD?063 returns the value of the byte
stored at location 063.
(Used for power-level cal, amongst other things)

N/A ERD?

ERD=xxx
where xxx is a
value between 0
and 255

Set RTC Date

DAY=

6 bytes,
numerical

Command or query
A command in the form ddmmyy, where; dd = day of
the month, between 01 and 31, mm = month of the
year, between 01 and 12 and yy = year, between 97
and 96 (1997 to 2000, then 2000 to 2096)
Example: DAY=240457 would be April 24, 2057

DAY= (message ok)
DAY? (received ok,
but invalid arguments
found)
DAY* (message ok,
but not permitted in
current mode

DAY? DAY=xxxxxx

(same format as
command
arguments)

Set RTC Time

TIM=

6 bytes,
numerical

Command or query
A command in the form hhmmss, indicating the time
from midnight, where hh = hours, between 00 and23;
mm = minutes, between 00 and 59, and ss = seconds,
between 00 and 59
Example: TIM=231259 would be 23 hours, 12
minutes and 59 seconds from midnight.

TIM= (message ok)
TIM? (received ok,
but invalid arguments
found)
TIM* (message ok,
but not permitted in
current mode

TIM? TIM=xxxxxx

(same format as
command
arguments)

Clear All
Stored Events

CAE=

None

Command only
Instructs the unit to clear all Stored Events
This command takes no arguments.

CAE= (message ok)

N/A

N/A

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