Synchronous Signal Properties

Use the Synchronous Signal type to see the data from a single channel decoded as a field of data or framed fields of data by using another channel as the bit clock. Optionally you can use the "Select" channel to qualify the clock.

Signal Name

Change the text displayed here to help you identify this signal definition. If the name has already been used, it will automatically be appended with a numerical value in brackets (i.e. [2]). The name displayed here will be used in the Waveform Views, Searches, Tables, Lists, Exports and all menu references.

Color Selection & Examples

An example is displayed in the current color scheme, followed by a listing of any items that allow custom colors (i.e. Signal Color, Signal Background). Click on an item in the list to select a new color.

Clock

Selects which physical channel to assign to the CLOCK.

Data

Selects which physical channel to assign to the DATA bus.

Select:

Selects which physical channel to assign to the ENABLE.

The enable can be disabled if not used.

Frame SYNC

Selects which physical channel to assign to the FRAME SYNC.

The FRAME SYNC can be disabled if not used. This can be used to identify frame limits.

Field SYNC

Selects which physical channel to assign to the FIELD SYNC.

The FIELD SYNC can be disabled if not used. This can be used to identify field limits.

Clock On

Selects which edge of the clock to use to strobe in data.

Select Level

Selects the active level for the Select signal.

LSB first

Selects LSB (Least significant bit) first.

Frame Length (fields)

Specifies how many fields are in a frame.

Set to 0 to disable this method of framing.

Field Length(s)

Specifies a list of comma separated field lengths (in bits).

The first number is the length of the first field, the second number is the 2nd field and so forth. Set to 0 to disable this method of framing.

Frame SYNC starts New Frame on:

Specifies how the Frame Sync signal is used (if enabled). Rising,Falling and Either edges specify what starts a new frame (and terminates the previous frame).The last two options specify that one edge starts a frame and the other edge terminates the frame. Any startframe will automatically end the previous frame.  Specifying the endframe just ends it earlier for aesthetics.

Field SYNC starts New Field on:

Specifies how the Field Sync signal is used (if enabled). Rising,Falling and Either edges specify what starts a new frame (and terminates the previous frame) The last two options specify that one edge starts a field and the other edge terminates it. Any startfield or start frame will automatically end the previous field. Specifying the endfield just ends it earlier for aesthetics.

Frame IDLE TIMEOUT (0 to ignore):

A new frame is started if no new bits are seen for more than the specified time. Set to 0 to disable.  This can be useful if there are no sync lines or field counts but you can see a consistent pause before each frame starts.

Field IDLE TIMEOUT (0 to ignore):

A new frame is started if no new bits are seen for more than the specified time. Set to 0 to disable.  This can be useful if there are no sync lines or field counts but you can see a consistent pause before each frame starts.

Skip Bits

Specifies how many bits to ignore at the start of the buffer. Useful for syncing up when capture starts mid-field

Show Field IDLEs

Specifies whether idle time between fields should be shown as a hashed field or if the current field should just extend to the next field.

Show Frame IDLEs

Specifies whether idle time between frames should be shown as a single center line or if the current frame should just extend to the start of the next frame.

NOTE: Multiple framing methods can be used at the same time.  For example, you could use a frame length specifier and the frames will be broken into the specified lengths. If a timeout is specified, it will override and terminate a frame if the specified time is exceeded.

Reset Colors - This button will reset the colors for this signal so that they will match the currently selected color theme (see: Color Themes).