CDM-Qx Satellite Modem

Revision 4

Remote Control

MN/CDMQx.IOM

Parameter

Type

Command

(Instruction

Code and qualifier)

Arguments for

Command or Response to Query

Description of Arguments

Response

to

Command

(Target to

Controller)

Query

(Instruction

Code and Qualifier)

Response to query (Target to Controller)

RX Signal Level

N/A

4 bytes

Query Only

N/A

RSL?

RSL=ccxx

 

 

 

Unit returns the value of the RX signal Level, in dBm,

 

 

(see description of

 

 

 

between –20 and –99 dBm, in the form: ccxx, where:

 

 

arguments)

 

 

 

Cc=code

 

 

 

 

 

 

GT=Greater Than

 

 

 

 

 

 

LT=Less Than

 

 

 

 

 

 

= is equal to

 

 

 

 

 

 

xx=value (the ‘-‘ sign is implied)

 

 

 

 

 

 

Example:

 

 

 

 

 

 

RSL=LT99 (RX signal level is less than –99 dBm)

 

 

 

 

 

 

RSL===41 (RX signal level is equal to –41 dBm)

 

 

 

 

 

 

 

 

 

 

RX BER

N/A

5 bytes

Query only

N/A

BER?

BER=a.bEc

 

 

 

Unit returns the value of the estimated corrected BER in

 

 

(see description of

 

 

 

the form a.b x 10-c. First 3 bytes are the value. Last 2

 

 

arguments)

 

 

 

bytes are the exponent. Returns 99999 if the

 

 

 

 

 

 

demodulator is unlocked.

 

 

 

 

 

 

Example: BER=4.8E3 (BER = 4.8 x 10-3)

 

 

 

 

 

 

 

 

 

 

CnC Ratio

N/A

4 bytes

Query only

N/A

CRM?

CRM=xxxx

Monitor

 

 

When CnC is enabled and it’s locked, it monitors the ratio

 

 

(see description of

 

 

 

between the interferer and the desired power in dB.

 

 

arguments)

 

 

 

Example 1: CRM==+02 (interferer > desired)

 

 

 

 

 

 

Example 2: CRM=LT10 (less than –11 dB)

 

 

 

 

 

 

Example 3: CRM=GT10(greater than +11 dB)

 

 

 

 

 

 

Example 4: CRM=99.9 (not locked or CnC not enabled)

 

 

 

CnC Delay

N/A

7 bytes

Query only

N/A

CDM?

CDM=xxx.xxx

Monitor

 

 

When CnC is enabled and it’s locked, it monitors the

 

 

(see description of

 

 

 

delay of the interferer in microseconds.

 

 

arguments)

 

 

 

Example 1: CDM=229,500 (229.5 ms)

 

 

 

 

 

 

Example 2: CDM=999,999 (not locked or CnC not

 

 

 

 

 

 

enabled)

 

 

 

C-36

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Mocomtech CDM-QX operation manual Rsl?, Rx Ber, Crm?, Cdm?