Owner manual
Table Of Contents
- Parts List
- Specifications
- Basic Functions
- How You Will Use the Model 725
- Installing timerPRO Software
- Setting Up the Model 725
- Field Upgradeable Software
- Getting Help
- Back Panel Inputs and Outputs
- Front Panel Controls
- Main Screen
- General Settings
- Channel Properties Screen
- Quiescent States
- Logic
- Timing Modes
- “Apply” versus “Program All Channels”
- Fixed Output Mode
- Passive Mode (Output = Input)
- Clocked Pulse Stream Mode
- Delayed Pulse After Trigger Mode
- Important Delay Timing Considerations
- Validated Trigger Input Mode (Noise Suppression)
- Timer Mode
- Dynamically-Delayed Pulse Mode
- Toggled Output Mode
- Dynamic Delay Compensation Mode
- Storing and Recalling Experiment Files
- Front Panel Controls and Indicators
- Selecting a Channel from the Front Panel
- Performing a Front Panel Function
- Store/Recall Settings Profiles

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Passive Mode (Output = Input)
In passive mode, the output signal equals the input signal or its logical inverse.
The front panel LED for the channel will glow green when the output is Low or red when the
output is high.
To try passive mode: On Channel A’s Settings screen, select the Output=Input timing mode. In
the Function box, choose Output=Input, then Click Apply to save the settings.
When the external trigger button is not depressed (i.e., the input signal is low), the signal at
Output A will be a TTL low. Now, depress the trigger button at Input 1—the signal at Output A
will go high. If you select Output=!Input (invert), the channel output will remain high until you
depress the trigger.










