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Front-Panel Operations
Setting the Output
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level. Based on this, the formula is:
20 log(V) - 10 log(Impedance * .001) = dBm.
Complete the following procedure to set an ac voltage output at the 5080A front-panel
NORMAL terminals. If you make an entry error, press G to clear the display, then
reenter the value.
W Caution
To avoid damage to the UUT, verify the applied voltage to the
UUT does not exceed the rating of the UUT insulation and the
interconnecting wiring.
1. Press R to clear any output from the 5080A.
2. Connect the UUT as described earlier in this chapter under “Connecting the
Calibrator to a UUT.”
3. Set the UUT to measure ac voltage on the desired range.
4. Output in volts Press the numeric keys and decimal point key to enter the desired
voltage output (maximum five numeric keys). For example, 2.4494.
Output in dBm Press the numeric keys and decimal point key to enter the desired
power output (maximum four numeric keys). For example, 10.00. For a power output
less than 1 mW (negative dBm values), press I to append the numeric entry with
the negative (−) symbol.
When you press the dBm key, the right most softkey becomes active. This allows the
dBm value and output impedance to be entered as a unit.
When output is entered in dBm, the Control Display appears as follows:
gew227f.eps
Note
At voltage outputs of 100 V and above (nominal), you may notice a slight
high-pitched sound. This is normal.
5. Press a multiplier key, if necessary. For example, press c.
6. Output in volts. Press V.
Output in dBm. Press b V. Select an impedance for dBm from a list on the
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