16 single-ended or 8 differential analog inputs,
jumper selectable
12-bit A/D converter, up to 100 kHz sampling rate with DMA transfer
Software programmable gain value for each analog input channel
Software selectable input range for each analog input channel
Two 8-bit digital input/output channels, TTL compatible
Flexible triggering options: software trigger, programmable pacer trig-
ger and external pulse trigger
Data transfer by program control, interrupt handler routine or DMA
Each A/D channel has its own individual input range, controlled by a range code stored in on-board RAM. If user want to change the range code for a given channel, select the channel as the start channel in register BASE + 02H, MUX scan, then Write the range code to bits 0 to 3 of BASE +01H.
Range codes appear below:
| PCM-3718H | |||||
| Input Range (V) | Unipolar/Bipolar | GainCode | |||
| G3 | G2 | G1 | G0 | ||
| -5 to +5 | B | 0 | 0 | 0 | 0 |
| -2.5 to +2.5 | B | 0 | 0 | 0 | 1 |
| -1.25 to +1.25 | B | 0 | 0 | 1 | 0 |
| -0.625 to +0.625 | B | 0 | 0 | 1 | 1 |
| 0 to 10 | U | 0 | 1 | 0 | 0 |
| 0 to 5 | U | 0 | 1 | 0 | 1 |
| 0 to 2.5 | U | 0 | 1 | 1 | 0 |
| 0 to 1.25 | U | 0 | 1 | 1 | 1 |
| -10 to 10 | B | 1 | 0 | 0 | 0 |
| N/A | 1 | 0 | 0 | 1 | |
| N/A | 1 | 0 | 1 | 0 | |
| N/A | 1 | 0 | 1 | 1 | |
| N/A | 1 | 1 | 0 | 0 | |
| N/A | 1 | 1 | 0 | 1 | |
| N/A | 1 | 1 | 1 | 0 | |
| N/A | 1 | 1 | 1 | 1 | |