User`s guide

Universal Library User's Guide Analog Input Boards - USB-1616FS
103
USB-1616FS
The USB-1616FS supports the following UL and UL for .NET features.
Analog input
Analog input functions and methods supported
UL: cbAIn(), cbAInScan(), cbALoadQueue()*, cbFileAInScan(), cbATrig()
UL for .NET: AIn(), AInScan(), ALoadQueue()*, FileAInScan(), ATrig()
*The channel-gain queue is limited to 16 elements. The USB-1616FS accepts only
unique contiguous channels in each element, but the gains may be any valid value.
Analog input argument values
Options: BACKGROUND, BLOCKIO**, BURSTIO***, CONTINUOUS, EXTTRIGGER, SINGLEIO**, and
EXTCLOCK
**USB-1616 Series packet size based on Options settings
Device
Options setting
Packet size
USB-1616FS
BLOCKIO
62
SINGLEIO
Equals the number of channels being sampled.
*** BURSTIO can only be used with the number of samples (Count) set equal to the
size of the FIFO or less. The USB-1616FS FIFO holds 32,768 samples. Also,
BURSTIO cannot be used with the CONTINUOUS option.
HighChan 0 to 15 in single-ended mode
Count In BURSTIO mode, Count needs to be an integer multiple of the number of channels
in the scan.
 For one-, two- , four-, eight-, and 16-channel scans, the maximum Count is 32768
samples.
 For three- and six-channel scans, the maximum Count is 32766 samples
 For five-channel scans, the maximum Count is 32765 samples
 For seven-channel scans, the maximum Count is 32767 samples
 For 9-, 10-, 12-, 13-, 14-, and 15-channel scans, the maximum Count is
32760 samples
 For 11-channel scans, the maximum Count is 32758 samples.
Rate: 200 kilohertz (kHz) maximum for BURSTIO mode (50 kHz for any one channel).
For all other modes, the maximum rate per channel depends on the number of
channels being scanned.
No. of channels
in the scan
Maximum rate
No. of channels
in the scan
Maximum rate
1 or 2
50 kHz
10
14 kHz
3
36 kHz
11
12.5 kHz
4
30 kHz
12
12 kHz
5
25 kHz
13
11.25 kHz
6
22 kHz
14
10.5 kHz
7
19 kHz
15
10 kHz
8
17 kHz
16
9.5 kHz
9
15 kHz
When using cbAInScan() or AInScan(), the minimum sample rate is 1 Hz. In
BURSTIO mode, the minimum sample rate is 20 Hz/channel.