# The user presets

The set up and adjustment of an USB Autoscope II is similar to an analog oscilloscope. However, being all digital, the advantages and conveniences of such technology are readily available. One of the time saving features is the ability to create or use presets. Thus, it is possible to save often used settings in the USB Autoscope II. For example, a preset named "lambda sensor" with the appropriate voltage and timebase can be saved. It is also possible to download universal presets. In the future, if it is desired to obtain a waveform from a lambda sensor, it will be not necessary to set up the USB Autoscope II, merely select the preset "Lambda sensor".
Universal presets.

- "8 channel"
  Displays waveforms of voltage on all eight analog inputs of the USB Autoscope II without synchronization.
- "Hall"
  This preset is intended for capturing and displaying waveforms from Hall sensors such as used for Crankshaft and Camshaft position sensors. It is necessary to connect input ¹1 in parallel with the signal wire coming from the Hall sensor.
- "Ignition"
  Diagnosing ignition systems.
  - "Ignition"
    Displays the ignition system waveform from all cylinders simultaneously.
  - "Ignition_Sync"
    Will display the ignition waveform on the cylinder that the high voltage probe is attached to. This mode is intended for ignition system diagnosis of vehicles equipped with a distributor.
  - "Ignition_Classic"
    Displays a "parade of all cylinders" and simultaneously displays in real time the firing voltage, burn time and the spark voltage for each cylinder individually. The mode is intended for diagnosing ignition systems equipped with a distributor.
    "Parade of cylinders" it may be necessary for correct display to modify the synchronization of the capacitive probe. In the left bottom corner of the oscilloscope window press the displaying a hammer and a screw-driver and in the opened window "Setup" to modify the parameter "Cap. sensor synchronization level:" so that the waveform is stable.
  - "Ignition_Dis"
    Displays a "parade of all cylinders" and simultaneously displays in real time the firing voltage, burn time and the spark voltage for each cylinder individually. The mode is intended for diagnosing DIS ignition.
    "Parade of cylinders" it may be necessary for correct display to modify the synchronization of the capacitive probe. In the left bottom corner of the oscilloscope window press the displaying a hammer and a screw-driver and in the opened window "Setup" to modify the parameter "Cap. sensor synchronization level:" so that the waveform is stable.
    On a DIS system it may be necessary to invert the signal coming from the high voltage adapter connected to the first cylinder (this is because on a DIS system the companion cylinders will have opposite firing voltages). If the green LED on the Ignition Adapter is on, click the button for a inverted signal in the adjustment panel for channel ¹2.
  - "Ignition_Cop"
    Displays a "parade of all cylinders" and simultaneously displays in real time the firing voltage, burn time and the spark voltage for each cylinder individually. The mode is intended for diagnosing ignition systems equipped with one ignition coil for each cylinder (COP (Coil on Plug) ignition) and using a capacitive probe attached to the ignition coil(s).
    "Parade of cylinders" it may be necessary for correct display to modify the synchronization of the capacitive probe. In the left bottom corner of the oscilloscope window press the displaying a hammer and a screw-driver and in the opened window "Setup" to modify the parameter "Cap. sensor synchronization level:" so that the waveform is stable.
  - "Ignition_Primary"
    Displays the primary ignition voltage waveform. The signal is connected to input ¹5 and this mode is intended for diagnosing problems in the primary circuit.
- "Ignition_Timing"
  Starts the plug-In "Ignition phase measurement" which in real time calculates and displays ignition timing and RPM of the engine.
  In order to perform this test, the spark plug on the cylinder used must be removed and the pressure transducer Px installed. A spark tester with a spark gap of not less than 5mm must be connected to the plug wire and grounded. The cylinder sync probe Sync should be attached to the spark plug wire for this cylinder.

| Warning!
Do not run the engine for more than 3 minutes with the pressure transducer installed. Damage to the catalytic converter and/or the pressure transducer may occur.

- "Injector"
  This mode is intended for capturing injector waveforms. The plug-in "Time parameters" will calculate and display in real time the injector pulse width. The input lead must be connected to the switched side of the injector. The switched side, in most cases, is the negative or ground side of the injector. An analog input ¹5 on the USB Autoscope II is used.
- "Lambda"
  This mode is intended for capturing the waveform from a lambda (Oxygen) sensor. Up to 4 sensors can be evaluated simultaneously, using input ¹1-4 of the USB Autoscope II.
- "Phases"
  This mode is used for checking vacuum waveform in an intake manifold.
  - "Phases"
    This test is intended for checking the cranking waveform of an engine. The low-pressure transducer must be connected to the intake manifold. It may be necessary to use a "T" and connect in-line on an existing vacuum port. The low-pressure transducer can be connected to any the first four analog inputs. The ignition and/or fuel delivery system must be disabled. The USB Autoscope II should be set to "record mode". The engine can then be cranked for 5-6 seconds. The recorded waveform can then be analyzed for any potential problems.
  - "Phases_Sync"
    This test enables a cranking waveform to be synchronized with the ignition system. The low-pressure transducer is connected as in the previous test. The signal lead is connected to any of the first 3 inputs. The cylinder sync probe Sync should be attached to the spark plug wire of the timing cylinder. The signal lead connected to the input In Synchro of the Ignition Adapter. The adapter connected to the USB Autoscope II. The fuel delivery must be disabled. With the oscilloscope set to record mode crank the engine for 5-6 seconds. The waveform, synchronized with the ignition, can then be analyzed.
    On a DIS system it may be necessary to invert the signal coming from the high voltage adapter connected to the first cylinder (this is because on a DIS system the companion cylinders will have opposite firing voltages). If the green LED on the Ignition Adapter is on, click the button for a inverted signal in the adjustment panel for channel ¹2.
- "Potentiometer"
  This mode is used for testing potentiometers. Any of the first 4 inputs can be used.

The displayed signal can be recorded. Select "Record". The recorded waveform can be analyzed, and, if desired, saved. To do so, select "File Save As.." in the "File" menu.