Instruction manual

112
6.7. CAN'T PROGRAM AC POWER SYSTEM ON GPIB
If the power source does not respond to IEEE-488 GPIB programming, the following items may
be at fault:
1. The power source unit address is wrong.
SOLUTION: Update address. See paragraph 3.7.1.
2. GPIB cable is loose at power source rear panel.
SOLUTION: Check connection, tighten jack screws.
3. The oscillator has failed.
SOLUTION: Replace the oscillator. See Paragraph 6.10.
6.8. DISTORTED OUTPUT
The AC Power System output may have a distorted sine wave from the following causes:
1. The power source output is overloaded.
SOLUTION: Remove the overload or program the current limit to a higher value. Observe
power source capabilities. See Section 1.
2. The crest factor of the load current exceeds 2.5. With this condition the distortion
will be much higher at frequencies above 100 Hz.
SOLUTION: Reduce the load or program the current limit to a higher value.
6.9. NO OUTPUT
If the AC Power System has no output at the rear panel terminal block, TB3, the following items
may be at fault:
1. If the External Sense lines are not connected correctly, there will be no output. The
error message AMP FAULT will also be generated.
SOLUTION: Correctly connect the sense lines. Refer to Paragraph 2.5.