![background image](http://html1.mh-extra.com/html/keithley/das-1800hc-series/das-1800hc-series_user-manual_3961491110.webp)
Analog Input Subsystem
C-19
Data Coding
The output range of each D/A channel is fixed at ±10V for all DAS-1800
boards except the DAS-1800AO which has two software programmable
ranges; ±5V and ±10V.
The DAS-1800HC uses split binary data coding for the two 12-bit D/A
channels. The output range is fixed at ±10 volts. The minimum DAC code
is 0 (–10V) and the maximum code is 4095 (+98.9951V).
The DAS-1800ST-DA uses 2’s complement data coding for the four
12-bit D/A channels. The output range is fixed at ±10 volts. The minimum
DAC code is -2048 (-10V) and the maximum code is +2047 (+9.9951V).
The DAS-1802HR-DA uses 2’s complement data coding for the two
16-bit D/A channels. The output range is fixed at ±10 volts. The minimum
DAC code is –32768 (–10V) and the maximum code is +32767
(+9.9997V).
The DAS-1800AO uses 2’s complement coding. The two 12-bit DACs
have two independently controllable, software programmable output
ranges of ±5V and ±10V.
The minimum DAC code is -2048 (-5 or -10V) and the maximum code is
+2047 (+4.9976 or +9.9951V).
Select the analog output range by using the Gain2Code support function
that returns the hardware value to the
channelGain
field (
startGainCode
VB property) of the Service Request. Select a gain of -1 for ±5V and a
gain of -2 for ±10V. The negative sign implies bipolar operation.
(Unipolar mode is not available for analog output).
If you select the ±5V range, the D/A output range will be from -5 to +5V
as follows:
Voltage Resolution
10V
4096
------------
2.4414mV
=
=
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com