This document describes the procedures used to test the Calorimeter Preamplifiers. Each species will be tested for power supply current, output peak voltage, output rise time, output fall time, and output undershoot / overshoot.

There are two test jigs. One jig, labeled CALORIMETER TEST JIG #3, is used for testing Species A-H. The second jig, ICD TEST JIG #5, is used to test Species I.

The test will be conducted in the following order, per species:

Current Test

Rise Time Test, Output Peak Voltage

Fall Time Test

Undershoot/Overshoot Test

Generate Standard Curve from XX preamplifiers that have passed the Current Test, Output Peak Voltage Test, the Rise Time Test, and the Fall Time Test.

Compare each preamplifier with the Standard curve per test instructions.

Time will be saved by running all preamplifiers of one species through Tests 1 and 2 before reconfiguring the scope for tests 3 and 4.

 

 

There are two ways to initiate a test cycle in the jigs, locally or remotely. Refer to Figure 1 for the location of external switches and connectors. The steps to be taken to select the mode of operation are as follows:

Position the LOCAL/REMOTE select switch UP.

Terminate LOCAL/REMOTE BNC connector with the 50 Ohm terminator.

To initiate a test cycle, depress the red Push-to-Test button on the front panel of the jig.

 

Position the LOCAL/REMOTE select switch DOWN.

Remove the 50 Ohm terminator from the LOCAL/REMOTE BNC connector.

Connect an external signal to the LOCAL/REMOTE BNC connector. A logical high initiates the test. The minimum pulse width for proper operation is 100ns.

 

Local: When a test cycle is initiated, the Push-to-Test button may be depressed momentarily or constantly. If the button is push momentarily, the test cycle will last 400ms. The LED display will momentarily illuminate green if the currents and voltages are within the specification window and then return to red. If the Push-to-Test button is constantly held down, the LED display will remain green if currents and voltages are within specifications. Releasing the button returns the display to red.

Remote: The external signal, provided to the LOCAL/REMOTE connector, operates the jig the same way as the Push-to-Test button. If the pulse width is short (minimum of 100ns), the jig will operate as though the button was momentarily depressed. If the external signal width is extended beyond 400ms, the jig operates as though the Push-to-Test button was continuously depressed.

 

Figure 1: Mechanical Drawing of the test jig illustrating the location of all externally

available onnectors and switches.

Figure 2: LED Display Indications. Describes the purpose and meaning of the LED

indicators that are seen on the front panel of the test jig.

Figure 3: Current Test Setup. Illustrates how the equipment is set up to conduct the

Current Test. The following equipment will be provided by Fermilab:

Preamplifier Test Jig

1 Pamona box terminated twist and flat cable for TP#3.

1 RG58 cable (5ns length) and breakout connector.

1 50 Ohm terminator for the LOCAL/REMOTE connector.

Equipment needed by vendor:

1. Digital Volt Meter (DVM)

Figure 4. Rise Time, Fall Time, and Under shoot Overshoot Test Setup. Illustrates how

the equipment is set up to conduct the Rise Time Test, Fall Time Test, and the

Undershoot/Overshoot Test. The following equipment will be provided by Fermilab:

Preamplifier Test Jig.

1 Pamona box terminator for the scope Trigger connection.

1 Pamona box terminated twist and flat cable for TP#3.

1 50 Ohm terminator for the LOCAL/REMOTE connector.

3.5" computer disk with scope setup files.

Equipment needed by vendor:

Tektronix Oscilloscope

Two scope probes.

Figure 5. Species Selection Chart.

This chart illustrates the position of the switches that are located on the Digital Control board and the ZIF board. This chart is mounted on the inside cover of the test jig for easy access. The location of the switch banks is also available on this drawing.

Figure 6. Species A Rise Time and Voltage Peak Scope Plot.

This plot illustrates the waveforms that should be seen on the scope when conducting the Rise Time and Voltage Peak Test on Species A preamplifiers. Similar signals will be seen for Species B-H. Channel 2 is the Trigger signal, Channel 1 is the preamplifier output as seen at TP#3. The Rise Time and Pk-Pk Voltage is given on the right-hand side of the plot.

Figure 7. Species I Rise Time Test and Voltage Peak Test Scope Plot.

This plot illustrates the waveforms that should be seen on the scope when conducting the Rise Time and Voltage Peak Test on Species I preamplifiers. Channel 2 is the Trigger signal, Channel 1 is the preamplifier output as seen at TP#3. The Rise Time and Pk-Pk Voltage is given on the right-hand side of the plot.

Figure 8. Species A Fall Time Test Scope Plot.

This plot illustrates the waveforms that should be seen on the scope when conducting the Fall Time Test on Species A

preamplifiers. Similar signals will be seen for Species B-H. Channel 2 is the Trigger signal, Channel 1 is the preamplifier output as seen at TP#3. The Fall Time is given on the right-hand side of the plot.

Figure 9. Species I Fall Time Test Scope Plot.

This plot illustrates the waveforms that should be seen on the scope when conducting the Fall Time Test on Species I preamplifiers. Channel 2 is the Trigger signal, Channel 1 is the preamplifier output as seen at TP#3. The Fall Time is given on the right-hand side of the plot.

Figure 10. Undershoot/Overshoot Test Plots.

This figure graphically shows the steps to generate the Standard Curve and the Individual Curve for the Undershoot/Overshoot Test.

Figure 11. Preamp Species Specifications.

This table summarizes the test window values, component values per species, and the number and type of species needed for this run.