Comtech EF Data CDM-840 Specifiche Scaricare il pdf (Pagina 161)

CDM-840 Remote Router Revision 2

Serial-based Remote Product Management MN-CDM840

7–15

7.3.4 Demodulator Status Commands and Queries

Parameter

Type

Command

(Instruction

Code

& Qualifier)

Number of

Arguments for

Command or

Response to Query

Description of Arguments

(Note that all arguments are ASCII numeric codes from 48 and 57)

Response to

Command

(Target to

Controller)

Query

(Instruction

Code &

Qualifier)

Response to Query

(Target to Controller)

Rx Signal

Level

N/A

5 bytes

Query only.

Returns the value of the Rx signal level, in dBm, from -25 to

-55 dBm with a tolerance of ±5 dBm. Resolution = 0.5dB.

Note the following:

If in the range of -25 to -55dBm, returns RSL=-xx.y

If >-25dBm, returns SL1=GT-25 (GT = ‘greater than’)

If <-55 dBm, returns SL1=LT-55 (LT = ‘less than’)

Example: <1/RSL?’cr’

N/A

RSL?

RSL=xxxxx

(see description

of Arguments)

Rx Es/No

N/A

4 bytes

Query only.

Returns the value of Es/No in the form xx.x, where:

xx.x = valuefrom -1 to -40 dB.

Negative sign (-) is implied.

Resolution = 0.1 dB.

Returns 99.9 if demod is unlocked.

Returns +040 for values greater than -40.0 dB.

The Es/No number correspond to the value that is displayed on HTTP (virtual

front panel) or SNMP. This value is averaged in the background for the

previous 16 values.

For a faster Es/No reading use REN command.

Example: <1/EBN?’cr’

N/A

ESN?

ESN=xxxxx

(see Description of

Arguments)

1 2 ... 156 157 158 159 160 161 162 163 164 165 166 ... 243 244

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Comtech EF Data CDM-840 Specifiche Pagina 161

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