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TCPIP meter
Creates a meter within the radio that will accept values through the VITA49 port 4991 through UDP. All fields in the command are required.
C[D]<seq_number>|meter create name=<name> type=<meter_type> min=<float_value> max=<float_value> units=<unit>
<name> = Name for the meter (must be 20 characters or less)
<meter_type> = the type of client that is requesting the meter (see table)
<min> = Minimum value for meter (floating point)
<max> = Max value for meter (floating point)
<unit> = This determines the scaling that the radio will use. DB|DBM|DBFS|VOLTS|AMPS|TEMPF|TEMPC|RPM|SWR
Example:
C43|meter create name=MyAMP type=AMP min=0.0 max=1500.0 units=WATTS
The table below shows the currently supported <meter_type> parameters to the create command:
Parameter | Value |
---|---|
AMP | External power amplifier |
WAVEFORM | Waveform using the Waveform API |
See Response Format for details on the format of the response messages from the radio
Hex Response | Message | Debug Output / Meaning |
---|---|---|
00000000 | <meter_number>, <stream_id> | OK, <meter_number> is the id to use in future communications (decimal), <stream_id> is the stream id that must be placed in the UDP VITA49 packet when sending meter values (hexadecimal) |
50000016 | Malformed Command | |
5000002C | Incorrect number of parameters | |
500000A5 | Invalid meter type | |
500000A6 | Invalid Units |
Responses
Response Example:
R43|27,0x88000000
Once a meter has been created the radio will accept meter packets on the standard VITA49 Port 4991.
Using the Metering protocol#Meter_Extension_Packet format you can create UDP VITA49 packets to provide streaming meter values for the meters you have created.
Several things must be set properly in the packet:
- The Stream Identifier field must be the <stream_id> given in the response to the "meter create" command.
- The Meter Identifier field must be the <meter_number> give in the response to the "meter create" command.
If you have created multiple meters you can bundle all the values in a singe VITA49 packet.
Since the VITA49 Meter packet only allows int16 scaling is done on certain units to get the reported value.
Unit | Scaling |
---|---|
DB,DBM,DBFS | Converted to VitaDB value ( converted_value = ((int32)(MeterValue * 128) & 0xFFFF) ) |
VOLTS,AMPS | Converted to floating point value ( converted_value = (float) ( MeterValue * 256.0) |
TEMPC,TEMPF | Converted to floating point value ( converted_value = (float) ( MeterValue * 64.0) ) |
All Others | Value used directly without conversion |