Specifications

14 National Instruments
14-24
PC-TIO10 Counter FM & ARM
The PC-TIO-10 has two AM9513A chips each with 5 counters for a total of 10
counters on the board.
The PC-TIO-10 FM & ARM driver programs the AM9513A for FM (Frequency
Modulation) signal generation (a square wave with fixed duty cycle and
variable frequency). Additionally the driver allows to arm and disarm the
counter by the second block input.
Scaling of Input to Output
Driver Block Parameters
Counter - From the list, choose 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 to select which
counter is used with this driver block. In each case, one block is needed for each
counter.
Frequency Base - From the list, choose F1=1MHz, F2=100kHz, F3=10kHz,
F4=1kHz, or F5=100Hz to set the base frequency.
Initial Relative Output Frequency - Enter a value between 0 and 1. The
Initial Relative Output Frequency defines the initial output frequency of the
FM-signal relative to the Frequency Base during driver initialization.
For example, if the initial output frequency of a square wave has to be 17.5
kHz, then choose F2=100kHz as the Frequency Base and enter
0.175 as the
Initial Relative Output Frequency. 100kHz x 0.175 = 17.5 kHz
Duty Cycle - Enter a value between 0 and 1 to set the duty cycle. The Duty
Cycle is held fixed during simulation.
Initial Toggle State - From the list, choose high or low. The Initial Toggle
State sets the digital level (high or low) of the output. For example, if the Duty
Cycle is 0.25 and the Initial Toggle State is High, the first 25% of the period
will have a high-level and the last 75% will have a low-level.
Hardware Input Block Output Data Type Scaling
TTL Variable frequency: double
Arm: double
<0.5 disarmed
>
0.5 armed