Teledyne T3DMM6-5, User Manual

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dB
Each dB measurement is different between the input signal and a stored relative
value, with both values converted to dBm. The dB function applies to AC voltage and
DC voltage measurements only.
Press →
【
dB/dBm On
】
and select
【
Function dB
】
to enter the interface
shown in the following diagram.
Diagram 2- 45 dB Function Interface
Table 2- 13 dB Measurement Function Menu Function Description
Function
Menu Settings Description
dB/dBm On/Off Turn on or turn off dB or dBm function.
Function dB Open dB function and the lower right corner of the main
display show “dB”.
Ref R Set the parameter via direction keys: 50Ω ~ 8000Ω.
dB Ref
Value Set the referred value of dB.
Measure
Ref Value Set the referred value of measurement.
Done Save all changes and return to the higher level menu.
The computation method of the dB:
dB = 10 x Log
10
【
(Reading
2
/R
REF
)/0.001W
】
– (dB setting value)
R
REF
expressed measuring the resistance value in the actual electric circuit.
Range of the dB setting value: -200 dBm ~ +200 dBm. The default is 0 dBm.
dB value:
• Input a value in dB setting interface using the direction buttons, and
then store it as dB setting value.
• Settings of dB value are stored in volatile memory.