Comtech EF Data DD2401 VME - Manual (Page 37)

DD2401 VME L-Band Demodulator Card Installation & Operational Manual User Interfaces
MN-VME2401 – Rev. B 4-13
ADDRESS ADDRESS BYTES
The RLLP Remote Port Packet structure is as follows:
Message format header character that defines the beginning of a
message. The character value is always 0x16. (1 byte)
Number of bytes in the field. (2 bytes)
Identifies the address of the equipment from where the message
originated. (1 byte)
Identifies the address of the equipment where the message is to be sent.
(1 byte)
Frame sequence number ensures correct packet acknowledgment and data
transfers. (1 byte)
This byte identifies the message type associated with the information
data. The equipment processes the data according to the value in this field. Return error
codes and acknowledgment are also included in this field. (2 bytes)
<...DATA...> Information data. The number of data bytes in this field is indicated by
the value.
The modulo 256 sum of all preceding message bytes excluding the
character. (1 byte)
4.4.9 DD2401/DD2401L Opcode Command Set
The DD2401/DD2401L Opcode Command Set is listed below, separated by commands that
control the demodulator, or the entire module.
4.4.10 Demodulator Command Set
RLLP Command Opcode
Query Demodulator All 2401h
Query Demod Latched Alarms 2406h
Query Demod Current Alarms 2409h
Query Demod Status 240Ch
Query Demod Eb/No, Input Level, Raw BER, Corrected
BER, and Frequency Offset, AGC Voltage 240Dh
Query Demod Lock Status 2437h
Command Demod All 2A00h
Command Demod Frequency 2A01h
Command Demod Data Rate 2A02h
Command Demod Sweep Boundary 2A04h
Command Demod Demodulation Type 2A07h
Command Demod Convolutional Decoder 2A08h
Command Demod Differential Decoder 2A09h
Command Demod Reed-Solomon 2A0Ah
Command Demod Descrambler 2A0Dh
Command Demod Descrambler Type 2A0Eh
Command Demod Spectrum 2A0Fh
Command Demod Buffer Clock 2A11h
Command Demod Buffer Clock Polarity 2A12h