User guide

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CHAPTER 6
The SIM Measurement Screen
6.7. METERS TAB
The Meters tab and the Delays tab share the same location in the lower right corner of the
SIM 3 screen. The Meters tab shows the level at each of the three measurement points, and
permits adjustment of both the measurement units and the level – optimizing the signal level
at each point for the best measurement.
Measurement units include:
■ dBVrms – RMS level in dBV for all measurements
■ dBVpk – Peak level in dBV for all measurements
■ Volts – Level in volts for all measurements
■ dBSPL – Average SPL for Microphone only in each measurement
■ dBSPLpk – Peak SPL for Microphone only in each measurement
Range may be changed with the [+] and [–] buttons under the Console, Processor, and
Microphone meters, or with Settings > Input Panel Settings. Either method triggers gain
and attenuation circuitry in 10-dB steps via relays in the input section of the SIM-3022
analyzer electronics.
NOTE: Range changes using the [+] and [-] buttons will also change the meter
scale values on the side of the trace view windows and along the top of the
meters under the Meter tab. Specifically, the top of the meter bar and spectrum plot
will always be set to the clipping point for the current range.
The ranges in 10-dB steps for each of the inputs are:
■ Console – 3.59 mVpk to 113Vpk (-49 dBVpk to +41 dBVpk front panel; line switchers
+31 dBVpk max)
■ Processor - 3.59 mVpk to 113Vpk (-49 dBVpk to +41 dBVpk front panel; line switchers
+31 dBVpk max)
■ Microphone, Front Panel - 3.59 mVpk to 113Vpk (-49 dBVpk to +41 dBVpk)
■ Microphone, Mic Switcher – 0.59 mVpk to 18.5 Vpk (-65 dBVpk to +25 dBVpk)
NOTE: The default value for each of the three measurement points is 1.13 Vpk
or 1.0 dBVpk.