User guide

821091: AMP1-MADIe User Guide
© 2012 Wohler Technologies, Inc. All rights reserved.
43
Chapter 4 Internal Menu System
Meter Type and Reference Menu
• Scale: Pressing this button and then rotating the Channel Volume
knob steps through the scales for the level meters. Six selections are
available as shown in Table 4–1 below.
• Float: Pressing this button and then rotating the Channel Volume
knob adjusts the ballistics of the floating segment.
• Bar: Pressing this button and then rotating the
Channel Volume
knob steps through the available settings for the bar ballistics. Refer
to Table 4–1 on page 43.
• Reference: Pressing this button and then rotating the
Channel
Volume
knob adjusts the reference. Refer to Table 4–1 on page 43
for the reference standards for each scale.
Table 4–1 Meter Limits and References
Scale
Bottom
Limit
Top Limit
Default
Reference
Default Color
Bounds
Default Ballistics
Lower Upper Float Bar
AES -72 dBFS 0.0 dBFS 0 dBFS = 0 dBFS -30 dBFS -20 dBFS
IEC
Type I
VU
VU -45 dBr +3.5 dBr -20 dBFS = 0 dBr -3 dBr 0 dBr — VU
Extd VU -56 dBr +16.0 dBr -20 dBFS = 0 dBr -10 dBr 0 dBr — VU
BBC
(EBU)
-13.25 dBr +13.25 dBr -18 dBFS = 0 dBr 0 dBr 8 dBr — IEC Type II
Nordic -42 dBr +12.5 dBr -18 dBFS = 0 dBr -10 dBr 0 dBr — IEC Type I
DIN -53 dBr +5.5 dBr -15 dBFS = 0 dBr -5 dBr 0 dBr — IEC Type I
Table 4–2 Meter Timings
Ballistics Rise
Fall
Level
Change
Time
Average Not Specified
IEC Type I
5 ms to reach -2 dB of
settled reading
-20 dB 1.7 sec.
IEC Type II
10 ms to reach -2 dB of
settled reading
-24 dB 2.8 sec.
None Bar or Floating Segment Not Displayed
Note:
The AES scale has a fixed reference.