9100A/9200A/9400
Maintenance and Performance Checks 3-4
Amplifier Gain
Accuracy
Amplifier gain accuracy checks the gain accuracy of the power
amplifier. Each channel has its own power amplifier and therefore, the
accuracy is tested on each channel separately.
Gain Accuracy Tests
Equipment
:
DMM, Arbitrary Waveform Generator, Load Resistance,
50
Ω
feedthrough terminator
Preparation:
1. Configure the DMM as follows:
Function: ACV
Range: 200V
2. Connect the 9400 Channel 1 output to the DMM input. Attach
the load resistance at the input terminals of the DMM
3. Configure the Waveform Generator as follows:
Frequency: 1kHz
Output: On
Amplitude:
As required for the test
4. Connect the waveform generator to Channel 1 input. Terminate
the waveform generator using the 50
Ω
feedthrough terminator at
the 9400 input
Test Procedure
1. Perform Gain Accuracy tests on channel 1 output using Table
3-2
2. Use the same procedure to check channels 2, 3 and 4
Table
3-2, Gain Accuracy Tests
Arb Amplitude
DMM Reading
Setting Error
Limits
CH1
CH2
CH3
CH4
Pass
Fail
2 Vp-p
35.4 V,
±
0.7 V
4 Vp-p
70.75 V,
±
1.4 V
6 Vp-p
106.1V,
±
2.1 V
8 Vp-p
141.4 V,
±
2.8 V
Amplifier
Bandwidth
Amplifier bandwidth checks the bandwidth of the output. Each channel
has a different response and therefore, the bandwidth is tested on
each channel separately. The amplifier responds differently to small
and large signals and therefore its bandwidth is checked for each type
of level
Bandwidth, Large
Signals
Equipment
:
Oscilloscope, Arbitrary Waveform Generator, Load
Resistance, x100 high voltage probe, 50
Ω
feedthrough terminator
