Fluke PM-3370B, PM-3380B, PM-3390B, PM-3394B, PM-3384B user manual Channel Selection, Programming tip

3 - 38 USING THE COMBISCOPE INSTRUMENTS

3.6 Channel Selection

Input channels can be switched on or off by using the SENSe:FUNCtion[:ON] or SENSe:FUNCtion:OFF commands. An input channel is selected by specifying the parameter "XTIMe:VOLTage<n>", where the numeric suffix <n> specifies the input channel number. After a *RST command, channel 1 is turned on and the other channels off (including the EXTernal input for PM33x0A).

Addition of two channels can be selected by specifying the "XTIMe:VOLTage:SUM" parameter as follows:

>	Addition of CH1 and CH2:	"XTIMe:VOLTage:SUM 1,2"
>	Addition of CH3 and CH4:	"XTIMe:VOLTage:SUM 3,4"

Note: Enabling of the addition of input channels (e.g. CH3+CH4), automatically switches channel 3 and channel 4 on. Disabling of the addition of two channels (e.g. CH3+CH4), automatically switches channel 3 and channel 4 off, provided at least one channel remains on.

Programming tip:

If CH1+CH2 is on and CH3 and CH4 are off, CH1+CH2 cannot be programmed off by sending: SENSE:FUNCtion:OFF "XTIME:VOLTage:SUM 1,2"

Instead, send the command:

SENSe:FUNCtion:ON "XTIME:VOLTage2" ’Sets CH2 on

@1

@2

@3

@4

INPut	SENSe
		:FUNCtion
INPut[1]	:VOLTage[1]	:OFF
		"XTIMe:VOLTage1"
		[:ON]
INPut2	:VOLTage2	:OFF
		"XTIMe:VOLTage2"
		[:ON]
		:SWEep
INPut3	:VOLTage3	:OFF
		"XTIMe:VOLTage3"
		[:ON]
INPut4	:VOLTage4	:OFF
		"XTIMe:VOLTage4"
		[:ON]
		Main Time Base

TRACe

memory

CH 1

CH 2

CH 3

CH 4

ST7158

Figure 3.14 Input channel control

PROGRAM EXAMPLE:

CALL Send(0, 8, "SENSe:FUNCtion 'XTIMe:VOLTage:SUM 1,2'", 1)

’Sets CH1+CH2 on

CALL Send(0, 8, "SENSe:FUNCtion:ON ’XTIMe:VOLTage2’", 1)’

’Sets CH2 on, CH1+CH2 off, CH1 remains off.