Status (802.11b/g DSSS/CCK/PBCC)

The status line provides summary messages indicating the status of demodulation of the PPDU PLCP Protocol data unit including the PLCP Physical layer convergence protocol Preamble status, the PLCP Header status and the PSDU 1) PHY Service Data Unit, or 2) PLCP SDU MAC (Medium Access Control: In most wired and wireless networks, a mthod is used to control how and when a device can transmit data over the communications link. This is the network's Medium Access Control scheme. The MAC protocol operates within the Data Link layer (Layer 2) of the ISO OSI 7 layer Model. The IEEE 802.11 standard, for example, specifies the MAC protocol for sharing of the wireless medium, packet formats, addressing, eror detection and recovery following errors. status. The Status message string format is as follows:

Status = [the PLCP Preamble status, the PLCP Header status, the PSDU data status]

PLCP Preamble status messages
The PLCP Preamble status indicates whether the SFD Start frame delimiter (Preamble Start Frame Delimiter) was found.
No SFD found - The SFD (Preamble Start Frame Delimiter) was not found
SFD OK - The SFD (Preamble Start Frame Delimiter) was found
PLCP Header status messages
The PLCP Header status string indicates the status of the PLCP Header:
Invalid header bits - Some of the data bits in the PLCP Header were incorrect, but the VSA was still able to determine the data length and data modulation format.
Header CRC failed - The header looked correct except for the CRC Cyclic Redundancy Check, which did not match the rest of the header data.
Invalid header phase shift - An extra (incorrect) 90 degree phase shift was detected at the start of the header.
Invalid Barker1/short - the detected burst type is 1MB/sec Barker with a short preamble, which is an invalid format.
<empty string> - means that the result length was not long enough to capture the entire header, so we don't know the status.
Header OK - means that the header appears correct and the header CRC passed.
PSDU MAC status messages
The PSDU MAC status indicates the status of the PSDU MAC frame.
blank - If the result length and measurement interval do not contain the entire burst, then this part of the string is left blank
MACFCS failed - The PSDU MAC frame check sum fails.
MACFCS OK - The PSDU MAC frame check sum passes.

API Programming Information

When queried programmatically, the Status entry in the Syms/Errs summary table is separated into two data results: the HdrStat (PLCP Header status) and MacStat (PSDU MAC status) status information. This table provides the HdrStat and MacStat values and meaning:

HdrStat Value	Description
0	No SFD found
1	Invalid header bits
2	Header CRC failed
3	Invalid header phase shift
4	Invalid Barker1/short
5	Unknown - the result length was not long enough to capture all of the header data, so the status cannot be determined.
6	Header OK

MacStat Value	Description
0	Unknown - the result length was not long enough to capture all of the data, so the MAC status cannot be determined.
1	MAC FCS Frame check sequence failed
2	MAC FCS OK