Time Electronics User Manual
5051 Plus and 7051 Plus Multifunction Calibrators v2.1
xx51+ Multifunction Calibrators Page 43 of 64
7.9.2. Amplitude (50 ohm)
The Amplitude (50 ohm) function is suitable for driving a 50 ohm inputs. It allows outputs between
5mV and 2.2V. The output waveform may be either DC or a 1kHz square wave.
7.9.2.1. Setting the Output
To set an output, decide the number of Y-axis graticules on the oscilloscope under test that you wish
the output signal to occupy. Press the Graticules button required. Now set the voltage per graticule
by pressing the required Voltage per Graticule button. Total output is:
Output Voltage = Voltage per Graticule x Graticules
Note: Only buttons that will give an output in the allowed range 5mV to 2V will be displayed. For
example, if the 1 graticule button is selected, then the 1mV and 2mV per graticule buttons will not be
shown. Similarly, if the 1V per graticule button is selected, then the 4, 6 and 8 graticules buttons will not
be shown. The output value may be deviated in the normal way using the Dev + and Dev – buttons.
7.9.2.2. Setting the Output Waveform
Voltage outputs may either be a DC signal or a square wave of frequency 1kHz where the voltage
selected is the pk-pk output. Press the DC and 1kHz buttons to select the waveform.
**** IMPORTANT NOTE****
The quality of the BNC bayonet connection can have a significant effect on the accuracy. They can have a
connection resistance of 0.1 ohms or more. Therefore using a normal BNC lead to connect to the oscilloscope
can add 0.2 ohms and this will reduce the signal appearing at the scopes input by 0.4%. For accurate 50 ohm
calibrations allowance for this error must be made. However, the connection resistance is not stable and can
vary as the connector is moved. For stable connections other screw type connectors are recommended.
However, this type of connector is not very common on oscilloscopes.
7.9.2.3. Exiting the Amplitude (50 ohm) Screen
Pressing the Menu button will return to the Oscilloscope function selection screen.
To Next Page
Loading...