DIO Tab

The DIO tab provides access to the settings and controls of the digital I/O as well as the Trigger channels and is available on all HF2 Series instruments.

Features

  • Monitor and control of digital I/O connectors

  • Control settings for external reference and triggering

Description

The DIO tab is the main panel to control the digital inputs and outputs as well as the trigger levels and external reference channels . Whenever the tab is closed or an additional one of the same type is needed, clicking the following icon will open a new instance of the tab.

Table 1. App icon and short description
Control/Tool Option/Range Description

DIO

btn mnu dio um

Gives access to all controls relevant for the digital inputs and outputs including the Ref/Trigger connectors.

functional dio
Figure 1. LabOne UI: DIO tab

The Digital I/O section provides numerical monitors to observe the states of the digital inputs and outputs. Moreover, with the values set in the Output column and the Drive button activated the states can also be actively set in different numerical formats.

With the Sync Bit 1,0 setting it’s possible to activate a TTL synchronization signal on one of the DIO BNC connectors on the instrument back panel.

Functional Elements

Table 2. Digital input and output channels, reference and trigger
Control/Tool Option/Range Description

Sync Bit 1

Select a demodulator reference signal to be applied on DIO 1.

Off

DIO output 1 (BNC connector) is not used for sync output and is free for other purposes.

Demod 1 to 8

Reference signal of the selected demodulator is output on DIO 1. Note: there is a 166 ns delay between the sync on DIO 1 and the front panel outputs (sync on DIO 1 comes first) which leads to a relevant phase shift at high frequencies.

Sync Bit 0

Select a demodulator reference signal to be applied on DIO 0.

Off

DIO output 0 (BNC connector) is not used for sync output and is free for other purposes.

Demod 1 to 8

Reference signal of the selected demodulator is output on DIO 0. Note: there is a 166 ns delay between the sync on DIO 0 and the front panel outputs (sync on DIO 0 comes first) which leads to a relevant phase shift at high frequencies.

QA Result Overflow

grey/yellow/red

Red: present overflow condition on the DIO interface during readout. Yellow: indicates an overflow occurred in the past. An overflow can happen if readouts are triggered faster than the maximum possible data-rate of the DIO interface.

DIO bits

label

Partitioning of the 32 bits of the DIO into 4 buses of 8 bits each. Each bus can be used as an input or output.

DIO input

numeric value in either Hex or Binary format

Current digital values at the DIO input port.

DIO output

numeric value in either hexadecimal or binary format

Digital output values. Enable drive to apply the signals to the output.

DIO drive

ON / OFF

When on, the corresponding 8-bit bus is in output mode. When off, it is in input mode.

Format

Select DIO view format.

Hexadecimal

DIO view format is hexadecimal.

Binary

DIO view format is binary.

Clock

Select DIO internal or external clocking.

Internal 64 MHz

The DIO is internally clocked with a fixed frequency of 64 MHz.

Clk Pin 68

The DIO is externally clocked with a clock signal connected to DIO Pin 68.

Available frequency range 1 Hz to 64 MHz.