BTH-1208LS User's Guide
Functional Details
12
In both Bluetooth mode and USB mode, you can start a hardware paced continuous scan with either a software
command or with an external hardware trigger event.
Burst scan
In burst scan mode (BURSTIO) you can acquire data at the maximum throughput of 50 kS/s from the
BTH-1208LS when connected in Bluetooth mode. BURSTIO doesn’t offer any advantage in USB mode, since
these rates are supported for BLOCKIO in USB mode.
Sample sizes are limited to the size of the FIFO (12288 samples) in BURSTIO mode. The acquired data is read
from the FIFO and transferred to a user buffer in the computer. You can initiate a single acquisition sequence of
one to eight channels with either a software command or an external hardware trigger event.
Burst scans are limited to the depth of the on-board memory, as the data is acquired at a rate faster than it can be
transferred to the computer. Keep in mind that when using Bluetooth, the rate of transfer of the acquired data to
the host is still limited, so the process can take several seconds. Time must be allowed between scans for the
acquisition AND the transfer of the data.
The maximum sampling rate is an aggregate rate. The total sample rate using burst scan mode is 50 kS/s per
channel for any or all channels. An error occurs if you exceed the FIFO capacity and acquire more than12,288
samples in BURSTIO mode.
BTH-1208LS components
These BTH-1208LS components are shown in Figure 2.
Screw terminal connectors
USB connector
Power/pairing button
LED indicators (Status and Power)
1
Screw terminals for digital I/O, digital trigger, power
out, clock input, and counter input
4
Power/pairing button
2
Screw terminals for analog input and analog output
5
Power LED (top) and Status
LED (bottom)
3
USB connector
Figure 2. Components
USB connector
The USB connector provides 5 V power when connected to a USB power supply, and provides both power and
communication when the device is connected to a USB port. If rechargeable NiMH or NiCd batteries are
installed, batteries recharge when the device is connected to a USB host or power supply.
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