Trigger modes and appendant registers

Channel Trigger

 

 

Detailed description of the channel trigger modes

Channel trigger on positive edge

The analog input is continuously sampled with the selected sample rate. If the programmed triggerlevel is crossed by the channel’s signal from lower values to higher values (ris- ing edge) then the triggerevent will be detected.

These edge triggered channel trigger modes correspond to the trigger possibilities of usual ocilloscopes.

Register

Value

Direction

set to

Value

SPC_TRIGGERMODE

40000

r/w

TM_CHANNEL

20040

 

 

 

 

 

SPC_TRIGGERMODE0

40200

r/w

TM_CHXPOS

10000

SPC_HIGHLEVEL0

42000

r/w

Set it to the desired triggerlevel relatively to the channel’s input range.

board dependant

Channel trigger on negative edge

The analog input is continuously sampled with the selected sample rate. If the programmed triggerlevel is crossed by the channel’s signal from higher values to lower values (fall- ing edge) then the triggerevent will be detected.

These edge triggered channel trigger modes correspond to the trigger possibilities of usual ocilloscopes.

Register

Value

Direction

set to

Value

SPC_TRIGGERMODE

40000

r/w

TM_CHANNEL

20040

SPC_TRIGGERMODE0

40200

r/w

TM_CHXNEG

10010

SPC_HIGHLEVEL0

42000

r/w

Set it to the desired triggerlevel relatively to the channel’s input range.

board dependant

Channel trigger on positive and negative edge

The analog input is continuously sampled with the selected sample rate. If the programmed triggerlevel is crossed by the channel’s signal (either rising or falling edge) the trig- gerevent will be detected.

These edge triggered channel trigger modes correspond to the trigger possibilities of usual ocilloscopes.

Register

Value

Direction

set to

Value

SPC_TRIGGERMODE

40000

r/w

TM_CHANNEL

20040

SPC_TRIGGERMODE0

40200

r/w

TM_CHXBOTH

10030

 

 

 

 

 

SPC_HIGHLEVEL0

42000

r/w

Set it to the desired triggerlevel relatively to the channel’s input range.

board dependant

(c) Spectrum GmbH

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Image 69
Spectrum Brands MC.31XX manual Detailed description of the channel trigger modes, Channel trigger on positive edge