Publicité
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921 VOLTAGE CONTROLLED OSCILLATOR
921 VOLTAGE CONTROLLED
OSCILLATOR Controls
これらのジャックを使用し
AUXILIARY OUTPUTS –
(11)
て、
コネクタ付きのケーブルを介して
3.5 mm TS
モジュールから補助波形信号をルーティングし
ます。
これらの合計ジャッ
FREQUENCY CONTROL INPUTS –
(12)
クを使用して、
コネクタ付きのケーブルを
3.5 mm
介して制御電圧および変調信号を発振器にルー
ティングします。
これらのジャックを使用し
WAVEFORM OUTPUTS –
(13)
て、
ジャック付きのケーブルを介してモジ
3.5 mm
ュールから発振器信号をルーティングします。
正弦波、 三角波、 のこぎり波、 長方形の
つの波
4
形を使用できます。
(CN) 控制
FREQUENCY –
(1)
使用此旋钮设置振荡器频率。 此旋
COARSE RNG
SCALE
钮的频率设置由
和
拨动开关以
RANGE
及
旋转开关控制。
RANGE –
(2)
该旋钮以八度音阶为单位设置振荡器的
FREQUENCY
总体频率范围， 然后可以使用
旋钮向上
或向下调节。
SCALE –
±6
(3)
此开关控制频率旋钮的音阶是
八度
±12
音阶还是
半音， 从而可以进行更精细的频率
控制。
COARSE RNG –
(4)
此开关控制振荡器频率是在音频
范围内起作用还是在音频阈值以下的较低频率范
围内起作用。
RECTANGULAR WIDTH –
(5)
使用此旋钮为矩形波形设
CNTRL IN
置默认宽度。 然后， 可以通过通过
插孔输
入的控制电压进一步控制和改变宽度。
CNTRL IN –
3.5 mm
这些总和插孔允许通过带有
(6)
TS
连接器的电缆为矩形波形提供控制电压和调
制信号。
CLAMPING POINT –
使用此旋钮设置振荡器波形
(7)
复位的点。
TRIG (V/S) –
3.5 mm TS
这些插孔允许通过带有
(8)
器的电缆将夹紧点的控制信号引入。 夹紧点可以
V
V-Trig (
)
通过
插孔通过
电压触发
信号触发， 也可
S
S-Trig (
)
以通过
插孔通过
开关触发
信号触发。
AUX OUT WAVEFORM –
使用此旋钮选择辅助输出
(9)
信号的波形， 包括正弦波， 三角波， 锯齿波， 倒锯齿
波， 方波和方波。
AUX OUT LEVEL –
AUXILIARY OUTPUT
(10)
使用此旋钮调节
插孔的输出电平。
AUXILIARY OUTPUTS –
(11)
使用这些插孔通过带有
3.5 mm TS
连接器的电缆将辅助波形信号引出
模块。
FREQUENCY CONTROL INPUTS –
(12)
使用这些相加的插
3.5 mm
孔将控制电压和调制信号通过带有
连接器
的电缆路由到振荡器中。
WAVEFORM OUTPUTS –
(13)
使用这些插孔通过带有
3.5 mm
插孔的电缆将振荡器信号路由出模块。
:
有四种波形可用
正弦波， 三角波， 锯齿波和矩
形波。
Power Connection
P1
Red Stripe
2
1
10
9
200 mm ± 10
Connect end P1 to the module socket
Connect end P2 to the power supply
The 921 VOLTAGE CONTROLLED OSCILLATOR module comes with
the required power cable for connecting to a standard Eurorack
power supply system. Follow these steps to connect power to the
module. It is easier to make these connections before the module
has been mounted into a rack case.
1.
Turn the power supply or rack case power off and
disconnect the power cable.
2.
Insert the 16-pin connector on the power cable into the
socket on the power supply or rack case. The connector has
a tab that will align with the gap in the socket, so it cannot
be inserted incorrectly. If the power supply does not have
a keyed socket, be sure to orient pin 1 (-12 V) with the red
stripe on the cable.
3.
Insert the 10-pin connector into the socket on the back of
the module. The connector has a tab that will align with the
socket for correct orientation.
连接
4.
After both ends of the power cable have been securely
attached, you may mount the module in a case and turn on
the power supply.
Installation
The necessary screws are included with the module for mounting
in a Eurorack case. Connect the power cable before mounting.
Depending on the rack case, there may be a series of fixed holes
spaced 2 HP apart along the length of the case, or a track that
allows individual threaded plates to slide along the length of the
case. The free-moving threaded plates allow precise positioning
of the module, but each plate should be positioned in the
approximate relation to the mounting holes in your module before
attaching the screws.
Hold the module against the Eurorack rails so that each of the
mounting holes are aligned with a threaded rail or threaded
plate. Attach the screws part way to start, which will allow
small adjustments to the positioning while you get them all
aligned. After the final position has been established, tighten the
screws down.
Tuning Procedure
This procedure tunes the 921 VOLTAGE CONTROLLED OSCILLATOR
module's "octave scaling" to an exact 1 V/oct. calibration to
facilitate precise control.
Quick Start Guide
P2
1
2
HOT USED
15
16
+ 12V
+ 12V
GROUND
GROUND
- 12V
- 12V
1.
Power up the 921 module and allow it to warm up for a
few minutes.
2.
Prepare the following control settings on the 921 module:
a. Set the SCALE toggle switch to the ±12 SEMI position.
b. Set the RANGE toggle switch to the AUDIO position.
c. Set the RANGE rotary switch to 2'.
d. Set the FREQUENCY control knob so that the
sawtooth output is exactly 640 Hz as measured with
an accurate frequency meter.
e. Make sure none of the FREQUENCY CONTROL INPUTS
jacks are connected.
Note: All adjustment trimmers are accessible from the 921
module's underside. Note the positions of the SCALE and HI ADJ
multi-turn trimmers, and make sure you have suitable tools to
adjust the trimmers if required.
3.
Fine-tune the 921 oscillator's low-frequency scaling via the
following steps:
a. Apply exactly -2 V to a FREQUENCY CONTROL INPUTS
input jack. (A 921A module can be used to supply
the -2 V or use a similar low-impedance stable-
voltage source.)
b. Trim the SCALE trimmer to set 160 Hz, then remove
the -2 V input and readjust the FREQUENCY knob
to 640 Hz.
c. Repeat this cycle until both 160 Hz and 640 Hz are
accurate to ±1 Hz when the -2 V is plugged in and
out of the FREQUENCY CONTROL INPUTS jack.
4.
Fine-tune the 921 oscillator's high-frequency scaling via
the following steps:
a. With no FREQUENCY CONTROL INPUTS jack
connected, check the frequency is still set for 640 Hz
output, then apply exactly +2 V to the FREQUENCY
CONTROL INPUTS input.
b. Trim the HI ADJ trimmer to set the 921 sawtooth
output to exactly 2.560 kHz.
c. Re-check that 640 Hz is still correct when the +2 V
input is removed.
d. Repeat as required.
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