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

54
When a channel is in Fixed Output, Clock Pulse, Output=Input or Toggled timing modes,
the green light indicates that the output is currently LOW for that channel.
2. A red light typically indicates that the channel is in the process of triggering.
When a channel is in Fixed Output, Clock Pulse, Output=Input or Toggled timing modes,
the red light indicates that the output is currently HIGH for that channel.
3. When a channel indicator is steadily off, the channel is disabled (see Enable/Disable
Channels below). The channel indicator also turns off during delays and while waiting
for the input to return low for an edge trigger.
The following chart provides an overview of the front panel channel LEDs:
Mode Off Green Red
Fixed Output -- Output is Low Output is High
Output = Input
(Passive)
-- Output is Low Output is High
Clocked Pulse
Stream
-- Output is Low Output is High
Delayed Pulse After
Trigger
In delay period Waiting for trigger; if
retriggering is on,
light will glow green
once input goes low
In duration period; if
retriggering is off,
light remains red after
duration period
Validate Trigger
(Noise Suppression)
-- Waiting for trigger; if
retriggering is on,
light will glow green
once input goes low
In duration period; if
retriggering is off,
light remains red after
duration period
Counter Count data is being
reported, waiting for
input to go low
Waiting for first
trigger pulse
Waiting for second
trigger pulse
Dynamic Delayed
Pulse
-- Waiting for trigger; if
retriggering is on,
light will glow green
once input goes low
In duration period; if
retriggering is off,
light remains red after
duration period
Toggle -- Output is Low Output is High










