Specifies the differential channelnumber of the universal terminal pair on which to make the first measurement. If the Reps parameter is greater than 1, additional measurements will be made on sequential channels.
If the DiffChan number is entered as a negative value, all Reps are
performed on the same channel (burst measurement). The CR1000 burst measurement sampling ratefrequency is determined by the fN1 (first notch frequency) parameter, which can go up to a maximum of 93750 Hz (minimum sample interval of 10.667 uS). The SettlingTime parameter is used to delay once prior to beginning the burst. The total time prior to beginning the burst is the SettlingTime plus the ADC flush time (which is 810uS). The sample interval resolution is 1/93750Hz. The specified notch frequency will use the nearest multiple of (1/93750Hz) to get as close to the specified frequency as possible which can go up to a maximum of 31250 Hz (minimum sample interval of 32 uS). The SettlingTime parameter is used to delay once prior to beginning the burst. The total time prior to beginning the burst is the SettlingTime plus the ADC flush time (which is 450 uS). The sample interval resolution is 1/31250 Hz. The specified notch frequency will use the nearest multiple of (1/31250 Hz) to get as close to the specified frequency as possible.
| fN1 (Hz) |
Burst Sampling Rate |
| 50 or 60 |
50 mSec (or 20 samples per second) |
| 400 |
6.25 mSec (or 160 samples per second) |
| 4000 |
0.5 mSec (or 2000 samples per second) |
| Code |
Description |
| U1 |
Universal Terminals 1 and 2 (U1 = high/U2 = low)
|
| U3 |
Universal Terminals 3 and 4 (U3 = high/U4 = low) |
| U5 |
Universal Terminals 5 and 6 (U5 = high/U6 = low) |
| U7 |
Universal Terminals 7 and 8 (U7 = high/U8 = low) |
| U9 |
Universal Terminals 9 and 10 (U9 = high/U10 = low)
|
| U11 |
Universal Terminals 11 and 12 (U11 = high/U12 = low) |
| Code |
Description |
| 1 |
Differential Channel 1 (SE 1 and 2) |
| 2 |
Differential Channel 2 (SE 3 and 4) |
| 3 |
Differential Channel 3 (SE 5 and 6) |
| 4 |
Differential Channel 4 (SE 7 and 8) |
| 5 |
Differential Channel 5 (SE 9 and 10)
|
| 6 |
Differential Channel 6 (SE 11 and 12) |
| 7 |
Differential Channel 7 (SE 13 and 14) |
| 8 |
Differential Channel 8 (SE 15 and 16) |
Type: Constant