Limiter, Limiter] switch – Fostex FR-2 User Manual
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FR-2
Field Memory Recorder (Chapter 5: Recording/playback)
You can select the desired sampling frequency ("FS " for short) and quantization
bit length ("Bit" for short) for recording by using the [FS (kHz)] and [QUANTIZA-
TION] switches on the top panel.
You can select the FS from among 22.05 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz,
176.4 kHz and 192 kHz, while you can select the Bit between 16 and 24 bit. The
current FS and Bit settings are shown on the Home screen. See the available com-
bination of FS and Bit settings in the table below.
While receiving a digital signal, the FR-2 automatically detects the FS and Bit from
the receiving digital signal, which takes priority over the [FS (kHz)] and [QUANTI-
ZATION] switch settings.
Selecting the sampling frequency/quantization bit length
During recording, you cannot change FS and Bit setting.
If you change the [FS] select switch setting during recording, the switch setting becomes
effective when recording stops.
By using the limiter, the signal level is prevented from exceeding a certain level. In
result, the signal level fluctuation is suppressed. Therefore, the limiter is useful
when recording a sound whose level is unknown. You can activate the limiter for
both L and R channels by setting the [LIMITER] switch to "ON".
The FR-2 limiter uses the VCA (Voltage Controlled Amplifier) circuit. By default,
the threshold is -2 dB under the 24-bit full-scale level (all bits: ON) and the com-
pression ratio is 1:5. The limiter attack time is fixed to approximately 20 ms, while
the release time is fixed to approximately 150 ms.
Limiter
176.4
192
96
88.2
-26
-60
+4
-30
HPF
(100Hz)
PRE REC
ON
OFF
PLAY
REWIND
F (kHz)
F.FWD
STOP
OFF
ON
ON
OFF
OFF
ON
LIMITER
TRIM
44.1
22.05
48
-30
+4
-60
-26
R
L
[LIMITER] switch
176.4
192
96
88.2
MIC
LINE
LINE
MIC
-26
-60
+4
-30
HPF
(100Hz)
PRE REC
ON
OFF
LINE
/MIC
FS(kHz)
OFF
ON
ON
OFF
ST
MONO
TRACK MODE
24BIT
16BIT
QUANTIZATION
OFF
ON
LIMITER
TRIM
44.1
22.05
48
-30
+4
-60
-26
L
R
[QUANTIZATION] switch
[FS (kHz)] switch
You can see the current
FS and bit length.
FS (kHz)
BIT
22.05
44.1
48.0
88.2
96
176.4
192
16bit
24bit
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
During recording (or input monitor), the FS
and Bit follow the current switch settings.
While stopped (or during playback), the FS and Bit
recorded on the current file are shown.