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RCA Volt-Ohm-Milliammeter
Figure 5. Decibel Measurement
AF Output (Decibel) Measurement (See Fig. -5.)
1. Set the Function Switch to the " A C " position.
2. Set the Range Switch to a position considerably higher than the
decibel measurement to be made.
3. P l u g the black test lead into the " — C O M M O N " jack on the control
panel.
4. P l u g the red test lead into the " O U T P U T " jack on the control
panel.
5. Connect the test leads to the A C source to be measured.
6. Reset the Range Switch to a position which gives a suitable pointer
deflection.
7. Read the decibel measurement directly from the D B scale when
using the 2.5 V . range. W h e n using the 10 V , 50 V , or 250 V range
refer to the chart located at the lower right hand corner of the
meter scale, for the decibel factor that must be added to the meter
indication for the proper decibel measurement.
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