System 3
7-69
PZ3 Low Impedance Amplifier
PZ3_ChanMap Macro
In the data stream on the RZ2, the odd numbered channels are the recording
channels and the even numbered channels can report impedance measurements or
RMS values. The PZ3_ChanMap should be added to your RPvdsEx circuit along with
the RZ2_Input_MC macro to remap the data stream. The channel mapping macro
selects the appropriate channels from the PZ3 input stream and builds two separate,
sequential multichannel outputs containing either the amplified waveforms or alternate
data (impedance or RMS values).
Macro Options
The user can set several different options under the Options tab.
The designated number of channels to map and output.
The ability to enable/disable the impedance measurement output.
PZ3 Circuit Example
The following illustration shows how macros can be used to create a simple OpenEx
acquisition and control circuit for the PZ3.
The RZ2_Input_MC macro feeds the circuit with each digitally amplified signal
acquired using the PZ3 amplifier. The data is fed first through the PZ3_ChanMap
macro which separates the signals from their impedance (or RMS) values and
builds the appropriate multi-channel data stream for further processing. In this case
the signals are filtered and stored for post processing.
A CoreSweepControl macro is included to handle the required timing functions used
by programs such as OpenEx and a PZ3_Control macro configures the operation
mode of the PZ3 as well as any additional options that may be necessary. Three
