Manual- front panel description – Rane RA 30 User Manual
Page 4
Manual-
Front Panel Description
Analyzer display LEDs
are in a 5 by 30 array (3 color).
0 dB point
is for VU meter mode (SOURCE=LINE IN, GAIN to +4 dBu or -10 dBV, METER/RTA button=METER).
0 dB point
is for SPL meter mode (SOURCE=CAL MIC, GAIN to center detent, METER/RTA button=METER). See the
Range indicator , i.e., if the 100 Range LED is on, then the 0 dB LED = 100 dB SPL.
WEIGHT button:
provides user-selectable A- or C-weighting in SPL meter mode. The A-curve is a wide bandpass filter cen-
tered at 2.5 kHz, with ~20 dB attenuation at 100 Hz, and ~10 dB attenuation at 20 kHz, therefore it tends to heavily roll-off the
low end, with a more modest effect on high frequencies. It is the inverse of the 30-phon (or 30 dB-SPL) equal-loudness curve of
Fletcher-Munson. The C-curve is “flat,” but with limited bandwidth, with -3 dB corners of 31.5 Hz and 8 kHz, respectively.
SPL Range indicators: in 120 dB, 100 dB, or 80 dB maximum. The Cal Mic Input auto ranges for optimum operation.
NORMAL (Normalize) button:
sets the 0 dB reference to the maximum level in RTA mode, to help center the display.
Second function: Enables or disables the Peak Hold function in VU meter mode.
Third function: Displays the firmware version when the SOURCE switch is set to OFF. The top row number of LEDs illuminated
is the major version, the bottom row of illuminated LEDs is the minor version.
SCALE button:
User selectable ±1, ±3 & ±6 dB per row. For instance, in the ±3 dB position, the yellow LED in each band lights
when signals of that frequency are over +3 dB or below -3 dB, and the red LEDs light at +6 dB and -6 dB.
PINK NOISE button:
Engage to activate the built-in pink noise generator. Be sure your system is turned down before engaging this
switch to prevent scaring yourself. The LED glows to remind you when pink noise is active.
METER / RTA button:
Toggles between the RA 30 performing meter functions, or RTA functions. The corresponding LED
lights to let you know which function is active. The SPL function is only active when CAL MIC is selected and this switch is set to
METER.
0
OL / SIG indicators:
Signal and Overload alerts for the currently selected input. Adjust the GAIN control so the OL light does
not come on.
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GAIN control:
In SPL meter mode, the RA 30 is calibrated when using Rane's MIC 2 on the CAL MIC Input and the GAIN
control is in center detent position. In VU meter mode, the RA 30 is calibrated to +4 dBu nominal signal (0 dB on VU scale)
when the GAIN control is in center detent position, and calibrated to -10 dBV nominal signal (0 dB on VU scale) when the
GAIN control is in full clockwise position. The gray labels pertain to VU meter mode.
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SOURCE selector:
A single front panel selector switch chooses which input is fed to the RA 30:
1. OFF: No input selected.
2. CAL MIC: unbalanced, auto gain ranging, XLR-female front panel jack. Uses Rane's MIC 2.
3. LINE IN: balanced/unbalanced ¼" jacks on rear. For mono VU meter function, plug only into the left input.
4. AUX MIC: uncalibrated, balanced, rear panel trim control 15 to 45 dB gain range, rear panel OL LED
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CAL MIC Input jack: PLUG ONLY THE RANE MICROPHONE INTO THIS JACK – THE DC VOLTAGE SUPPLIED
BY THIS JACK COULD DAMAGE ANY OTHER MICROPHONE.
USE RANE
MIC ONLY!
ANALYZER
REALTIME
RA 30
GAIN
CAL MIC
SOURCE
0 dB
METER
RTA
SCALE
NORMAL
1
3
6
120
100
80
WEIGHT
C
A
RTA
METER
NOISE
PINK
VU
SPL
SIG
OL
+12
-12
CAL
-5
-27
-30
-24
-25
-21
-15
-18
-20
-12
-9
-15
-6
-3
-10
+3
+12
+6
+9
0
dB
dB
6.3k
50
25 31.5 40
160
63
80
125
100
315
200 250
400 500
1k
800
630
1.25k 1.6k
3.15k
2.5k
2k
4k
5k
20k
8k
10k
16k
12.5k
CAL
MIC
AUX
MIC
OFF
LINE
IN
0 dB
VU METER MODE
0 dB
SPL METER MODE