Electro-Harmonix CLOCKWORKS User manual

- WARRANTY INFORMATION -
Please register online at http://www.ehx.com/product-registration or complete and return the enclosed
warranty card within 10 days of purchase. Electro-Harmonix will repair or replace, at its discretion, a product
that fails to operate due to defects in materials or wor manship for a period of one year from date of
purchase. This applies only to original purchasers who have bought their product from an authorized Electro-
Harmonix retailer. Repaired or replaced units will then be warranted for the unexpired portion of the original
warranty term.
If you should need to return your unit for service within the warranty period, please contact the appropriate
office listed below. Customers outside the regions listed below, please contact EHX Customer Service for
information on warranty repairs at [email protected] or [phone]. USA and Canadian customers: please
obtain a Return Authorization Number (RA#) from EHX Customer Service before returning your product.
Include with your returned unit: a written description of the problem as well as your name, address,
telephone number, e-mail address, and RA#; and a copy of your receipt clearly showing the purchase date.
United States & Canada
EHX CUSTOMER SERVICE
ELECTRO-HARMONIX
c/o NEW SENSOR CORP.
55-01 2ND STREET
LONG ISLAND CITY, NY 11101
Tel: [phone]
Email: [email protected]
Euro e
JOHN WILLIAMS
ELECTRO-HARMONIX UK
13 CWMDONKIN TERRACE
SWANSEA SA2 0RQ
UNITED KINGDOM
Tel: [phone]
Email: electroharmonixu @virginmedia.com
This warranty gives a purchaser specific legal rights. A purchaser may have even greater rights depending
upon the laws of the jurisdiction within which the product was purchased.
To hear demos on all EHX pedals visit us on the web at www.ehx.com
Email us at [email protected]
- FCC COMPLIANCE -
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1)
This device may not cause harmful interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation. If the device is not installed and used in
accordance with the instructions, it may cause harmful interference to radio communications and void the
user's authority to guarantee the equipment.
Note: This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against
harmful interference in a residential installation. This equipment generates, uses and can radiate radio
frequency energy and, if not installed and used in accordance with the instructions, may cause harmful
interference to radio communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or television reception, which
can be determined by turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected.
• Consult the dealer or an experienced radio/TV technician for help.
Modifications not expressly approved by the manufacturer could void the user's authority to operate the
equipment under FCC rules.
CLOCKWORKS
Rhythm Generator / Synthesizer
Congratulations on your purchase of the Electro-Harmonix CLOCKWORKS!
The CLOCKWORKS is perfect as a master cloc for sequencers and drum
machines as well as for triggering electronic percussion, classic EHX drum
synths such as the Crash Pad or any other electronic device that can be
triggered by pulses. Best of all, it is a faithful reissue of the much sought-
after classic first released by Electro-Harmonix in 1980.
CLOCKWORKS does not create sound on its own but instead generates
pulses to trigger other devices. The pulse trigger can set the tempo for a
drum machine or sequencer such as an EHX 8 Step. CLOCKWORKS’ pulses
might directly play a device by triggering a sound or note in the external
device. The great thing about the CLOCKWORKS is you have four separate
cloc channels so you can connect four devices which will all play
rhythmically with each other.
The CLOCKWORKS may loo complicated but what it does is actually pretty
simple: it ta es a master cloc and divides down its frequency by a whole
number between 1 and 8, outputting a pulse at the new frequency created
by the divider. There are 4 cloc dividers or channels, each driven from the
same master cloc , so creating polyrhythms is fun and easy! Each channel
has its own cloc divider control, output level control and output jac . The
master cloc can be generated internally by the CLOCKWORKS or may come
from an outside source. Although the CLOCKWORKS loo s very much li e a
digital product, it is actually fully analog, not that there is anything wrong
with digital products.
WARNING: Your CLOCKWORKS comes equipped with an E ectro-Harmonix
18VDC-500mA power supp y. The CLOCKWORKS requires up to 300mA at
18VDC with a center POSITIVE p ug. The CLOCKWORKS does not take
batteries. Using the wrong adapter/power supp y may damage your unit and
void the warranty.

- CONTROLS, INDICATORS & I/O-
The following descriptions detail all of the sliders, switches, LEDs (lights) and
I/O jac s on the CLOCKWORKS:
CH 1-4 DIVISOR Sliders & LEDS
Each channel has its own independent DIVISOR slider control. Set a given
channel’s cloc divider by moving the center of its DIVISOR slider to the
number you wish to divide by. For example, if you want Channel 2 to divide
the master cloc by 3, set the CH 2 DIVISOR to 3, centering the slider on the
mar for 3.
Above each DIVISOR slider is an LED. The LED blin s each time the channel
sends out its cloc pulse.
CH 1-4 LEVEL Sliders
Each channel has its own independent output LEVEL control. The LEVEL
slider sets a given channel’s output pulse amplitude or level. The maximum
output pulse level is 10Vpp. The pulse waveform ranges from 0V to +10V, it
does not go below 0V. As you bring the LEVEL sliders down, the amplitude
decreases to 0V.
HOW TO SET THE LEVEL CONTROL:
Start with the LEVEL control at its bottom position. Move the LEVEL control
upwards while listening to or watching the slave device to which the channel
is connected. At lower LEVEL settings the slave device might not be triggered
at all or by only every other pulse from the Cloc wor s. Push the LEVEL
control up until each pulse from the Cloc wor s triggers the slave. Once you
reach this position, push LEVEL up a little bit more and then stop. The LEVEL
control is now set.
OUT 1 - OUT 4 Out ut Jacks
Each cloc divider channel has its own independent output jac . CH 1
connects to OUT 1, CH 2 to OUT 2, etc. The level of the pulse at each output
jac is controlled by its channel’s LEVEL slider. These jac s are mono/TS ¼”
jac s; insert any standard patch or instrument cable into the jac s.
CLOCK TEMPO Slider
The TEMPO slider located in the CLOCK section of the Cloc wor s adjusts the
master tempo or speed of the internal cloc generator. When the CLOCK
toggle switch is set to INT (for internal), the TEMPO slider sets the tempo
that all four cloc channels follow. TEMPO slider range: in BPM: 50BPM –
2,400BPM; in Hz: 0.85Hz - 40Hz.
CLOCK LEVEL Slider
The LEVEL slider located in the CLOCK section of the Cloc wor s adjusts the
output level of the internal master cloc sent to the CLOCK IN/OUT jac . The
maximum output pulse is 14Vpp. The pulse waveform ranges from 0V to
+14V, it does not go below 0V. As you bring the LEVEL slider down, the
amplitude decreases to 0V. See the section on the previous page entitled
HOW TO SET THE LEVEL CONTROL for help setting the CLOCK LEVEL
control.
CLOCK INT/EXT Switch
The CLOCK switch determines the source for the master cloc sent to the
four individual channels. When set to INT, the master cloc is generated
internally by the Cloc wor s (and set by the TEMPO slider). The internal
cloc is also sent out the CLOCK IN/OUT jac when set to INT.
When the CLOCK switch is set to EXT (for external), the internal cloc is shut
off and the Cloc wor s connects the external cloc present at the CLOCK
IN/OUT jac to the four cloc divider channels. If no cloc is connected to
the CLOCK IN/OUT jac , the Cloc wor s TEMPO LED does not blin , it
remains in a static state. When set to EXT, the CLOCK LEVEL slider is
inactive. The CLOCK TEMPO slider adjusts the amplitude of the external
cloc . We recommend you set TEMPO anywhere between its maximum and
middle slider positions when using external cloc . The acceptable input
amplitude range for the external cloc signal is 4Vpp to 15Vpp for a cloc
that swings positive only or +/-2 Vpp to +/-7.5 Vpp for a bi-polar cloc . The
maximum acceptable external cloc frequency that yields full pulse amplitude
out of all four channels is 65 Hz. The output pulses drop in amplitude as the
cloc frequency rises above 65 Hz.
CLOCK LED
The LED above the TEMPO slider blin s at the same rate as the master cloc
signal whether the cloc is generated internally or externally.
CLOCK IN/OUT Jack
When set to INT mode, the CLOCK IN/OUT jac is an output, the internally
generated cloc pulses will be output from this jac . When set to EXT mode,
CLOCK IN/OUT is an input, connect your externally generated cloc to this
jac .
18V Power Jack
Insert the output plug from the supplied 18VDC/500mA AC Adapter that
came with your Cloc wor s into the 18V power jac located at the front of
your Cloc wor s. The Cloc wor s’ power jac is center positive, requiring
18VDC with a minimum current rating of 300mA. The Cloc wor s can be
powered from a voltage as low as 15VDC but the maximum output pulse
amplitude will decrease and the maximum divisor, at the slider’s lowest
position, may increase to 9 or 10. We do not recommend powering the
Cloc wor s with voltages below 15VDC which may yield unpredictable
results.