Technical Functional Overview - Wohler AMP1A Series User Manual

A M P 1 A S e r i e s U s e r G u i d e
T e c h n i c a l F u n c t i o n a l O v e r v i e w

Technical Functional Overview

8 2 1 0 2 0 : A M P 1 A S er ie s U s e r G u i d e
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© 2 0 1 0 Wo h l e r Tec h n o l o g i e s , I n c. A l l r i g h t s r e s er ve d .
Figure 1–18
Meter Input Gain Calibration Settings
DIP switch sections S1 and S2 set the meter input gain calibration,
which determines the level of the input signal that will result in a "0"
reading on the meter bar graphs. The factory setting is +4 dBv, but can
instead be set for -6 dBv, 0 dBv, or +8 dBv by the user.
Bar Graph Display Modes
DIP switch sections S3 and S4 determine how peak levels are displayed
(display mode) and select either the "PPM" mode or an auto-reset "VU
Peak" mode (not the PPM value!). The PPM mode exhibits an attack
time of 10 milliseconds and a decay time of 2 seconds from 0 to -20 dB.
The VU mode exhibits a 300 millisecond rise to 99% of full indication
and a decay of 300 milliseconds. The factory setting is VU mode.
Figure 1–19 on page 23
overall functionality of the AMP1A Series monitors.
Meter Input Gain Calibration and
Display Mode DIP Switch Settings
through Figure 1–22 on page 26 illustrate the