Standard Pattern (RFID)
Selected (See RFID Standard Setups/Presets Table)
Selecting specifies the synch pattern from a set of standard protocol patterns. The radio button is available when is selected.
To select a standard protocol pattern, click the menu button to the right of the displayed protocol, the button with ellipses (...).
Clicking the (...) button displays a list of available protocol patterns that can be selected for a sync search. The available patterns are listed in the following table.
When an RFID tag's signal has a flipped amplitude phase (where the modulated bit amplitude decreases from the CW amplitude, rather than increases), the standard pattern synch search can fail. The standard pattern search is performed using the raw demodulated bits. If the signal has a flipped amplitude phase, the raw bits do not match the bit patterns defined by the protocol standard.
Sync Search Bit Patterns
|
Protocol |
Pattern |
|---|---|
|
EPCglobal Class-1Generation-2 (Forward) |
Preamble Frame Sync RTcal TRcal |
|
EPCglobal Class-1Generation-2 (Return) |
FM0 Preamble TRext0 FM0 Preamble TRext1 Miller Preamble TRext0 Miller Preamble TRext1 |
|
ISO 18000-4 Mode-1 (Forward) |
Preamble Start Delimiter 1 |
|
|
|
|
ISO 18000-4 Mode-1 (Return) |
Preamble |
|
|
|
|
ISO 18000-6 Type-A (Forward) |
SOF EOF |
|
|
|
|
|
|
|
ISO 18000-6 Type-A (Return) |
Preamble |
|
|
|
|
ISO 18000-6 Type-B (Forward) |
Preamble Start Delimiter1 Start Delimiter2 Start Delimiter3 Start Delimiter4 |
|
|
|
|
ISO 18000-6 Type-B (Return) |
Preamble |
See Also
Sync Search Tab (RFID Demod Properties)
