VXi VT1529A/B 사용자 설명서

Each buffered dynamic strain channel includes an offset adjusting DAC 
controlled by the command 
SOURce:VOLTage[:AMPLitude] <-offset_v>,(@<ch_list>)
Reducing the unstrained bridge offset voltage at the dynamic strain port 
channel can allow the VT1432A to measure the channel using a more 
sensitive range. See Figure 3-14 for the offset DAC arrangement.

To reduce the offset voltage at each dynamic strain "Buffered Output" 
channel:

1. Measure an unstrained Buffered Output channel with a 

VT1432A/33B and place the value in a variable arbitrarily called 
<offset_v>.

2. Send minus <offset_v> to that channel with the SOUR:VOLT 

command. For example: SOUR:VOLT <-offset_v>,(@10000)

With a 13 mV resolution, the offset DAC can reduce the Buffered Output 
channel offset to within a few millivolts of zero.

+

-

Buffer

To VT1422A

(VT1539A SCP)

X2

Channel Buffer

RJ-45

X2

2:1

Mux

Cal-

Cal+

Optional

Filter

2,10,100Hz

Instrument.

Amplifier

Dynamic Strain

Buffered Output

32:1
Mux

CH31

CH01

CH00

X16

8-bit offset

DAC