Vernier Software and Technology
Vernier Software & Technology
Tech Info Library

Power Amplifier Troubleshooting and FAQs

Power Amplifier, order code PAMP, $225
Specifications and User Guide

- Primary Test:
First test the connections:
-Does the yellow LED turn on when you flip the front switch on (up, toward the "1")?
-If you are controlling the PAMP via LabQuest, do you have a stereo mini phone plug running from the round connector on the back of the PAMP to the audio out connector on LabQuest (with the symbol of the speaker near it)? Make sure this cable is plugged in all the way on both ends. Sometimes the shielding on the cable hits against the rubber on the LabQuest and will not go in all the way.
-If you are controlling the PAMP with a LabPro, do you have a double-ended BTA connector between the back BTA connector on the PAMP and CH4 of the LabPro? No other channel on the LabPro will work.

- Secondary Test:
Connect a small lamp or LED to the red and black terminals of the PAMP. Set the output to a sine wave and see if it lights.

-TIL 1251: How do I use the Pasco Power amplifier with LabPro?
-TIL 1994: The Power Amplifier doesn't respond to LabPro input.
-TIL 2118: When I plug in a Power Amplifier, it is not recognised.
-TIL 2131: Is connector on the Power Amplifier connected to the black lead of a VP-BTA?
-TIL 2017: An experiment using the current sensor of the power amplifier (PAMP) gives unexpected results
-TIL 2160: How do I use the Power Amplifier current sensor at the same time as LabPro analog out?
-TIL 2172: Can I use the Vernier Power Amplifier with the LabQuest Mini or LabQuest Stream?
-TIL 2607: Why is my Power Amplifier not putting out any signal?
-TIL 2747: How can I get high frequencies using PAMP and LabPro?
-TIL 2954: What is the mass per unit length of the cord with the Speaker Accessory?
-TIL 3439: Why does my Power Amplifier cause my LabQuest to disconnect from Logger Pro when I try to set the frequency?
-TIL 3553: Why do I get strange waveforms from the Power Amplifier Function Generator application?
-TIL 3938: How can I check to see if my Power Amplifier power supply is working?
-TIL 4443: What signal sources can I use with the Power Amplifier?

- Maximum voltage: ±10 V
- Maximum current: up to 1 A
- Waveform supported: DC, sine, square, triangle, and sawtooth waveforms
- Frequency range: 0.25 Hz to 10,000 Hz

- Calibrate? No.
Note that there is a current sensor inside the PAMP. It is an autoID sensor. It only shows up when the PAMP power is on. It is different from our DCP-BTA. It has a range of +/-1 ampere.

- Differential Voltage Probe, order code DVP-BTA, $39
- Current Probe, order code DCP-BTA, $39
- Extech Digital DC Power Supply, order code EXPS, $229

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