NF FRA5014, Инструкция по эксплуатации

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2.4 Simple Operation Checks
FRA5014 2-10
2.4 Simple Operation Checks
FRA5014
operation checks should be performed in the following order before performing important
measurements or following extended periods of non-use.
1. Plug the mains supply cord into the outlet and turn on the power switch.
Shortly after the power goes on, calibration will begin and the CALIBRATION lamp will light.
When calibration is completed, the CALIBRATION lamp goes off, and the unit is ready to start
taking measurements.
2. Check for I/O insulation.
•
Using a resistance meter such as a tester or multimeter, measure the resistance values between
external conductors of the OUTPUT OSCILLATOR. INPUT CH1, CH2, CH3, and CH4
connectors and the grounding terminal in the center of the rear panel, making sure it is at least
10 MΩ.
3. Connect a personal computer to the
FRA5014
. To do this, use the DIP switch on the rear panel
change to change the remote interface setting.
For details, see “ 5 REMOTE CONTROL
”
4. Initialize the settings
.
•
Enter the remote command “*RST”.
5. Connect the FRA5014
’s OUTPUT OSCILLATOR terminal to an oscilloscope, via a BNC-BNC
cable (etc.). Set up the oscilloscope as follows.
•
Input impedance: 1 MΩ
•
Input sensitivity: 2 V/DIV
•
Sweep rate: 0.2 ms/DIV
•
Trigger level: 0 V
6. Check the oscillator’s output waveform.
•
Enter the remote command “FREQ 2000” to set the frequency to 2 kHz.
•
Enter the remote command “VOLT 5” to set the amplitude to 5 Vrms.
•
Enter the remote command “VOLT:OUTP 2” to output a sine wave with the specified
amplitude, and make sure the OSCILLATOR lamp is on.
7. Change the frequency and AC amplitude.
•
Change the frequency setting, then check that a signal at the newly set frequency has been
output.
•
Change the AC amplitude setting, then enter the remote command “VOLT:OUTP 2” and
check that the amplitude is at newly set value.
•
Lastly, change the amplitude to 1 Vrms and enter the remote command “VOLT:OUTP 2”.
8. Use a BNCT type divider (or the like) to split the FRA5014
’s OUTPUT OSCILLATOR output,
then connect them to the INPUT CH1, CH2, CH3, and CH4 terminals.
Since signal I/O is insulated from the case, also connect each signal ground.
9. Perform a sweep measurement, and check that the overall gain is approximately 0 dB and phase
is approximately 0 deg.
•
Enter the remote command “SWE:MEAS DOWN”. Make sure the MEASURE lamp is on.
•
After making sure the MEASURE lamp is off, enter the remote command
“SENS:DATA:SWE?”, query the measurement results, then read the measurement results via
the personal computer.