Mutec REF 10 User manual

1
Manual
REF10 NANO

3
Content
Precautions . . . . . . . . . . . . . . . . . . . . . . . 4
Warranty Regulations . . . . . . . . . . . . . . . . . 5
Introduction
General Description . . . . . . . . . . . . . . . . . . . 6
Features . . . . . . . . . . . . . . . . . . . . . . . . . 6
Matching MUTEC Products . . . . . . . . . . . . . . . 7
Accessories . . . . . . . . . . . . . . . . . . . . . . . 7
Product Registration for Warranty and Support . . . . . 7
Social Media . . . . . . . . . . . . . . . . . . . . . . . 7
Installation
Shipping Contents . . . . . . . . . . . . . . . . . . . . 8
Placing the Device . . . . . . . . . . . . . . . . . . . . 8
Interface Connections . . . . . . . . . . . . . . . . . . 9
Usage of the DC Power Input . . . . . . . . . . . . . . 9
10 MHz compatible Products . . . . . . . . . . . . . . 9
Control Elements and Terminals
Front Panel. . . . . . . . . . . . . . . . . . . . . . . .10
Rear Panel . . . . . . . . . . . . . . . . . . . . . . . 10
Operation
General System Operation . . . . . . . . . . . . . . . 11
Recommendations for the REF10 NANO. . . . . . . . .11
Applications
Using the REF10 NANO with other Products. . . . . . .12
Appendix
Pin Assignment of the Terminals . . . . . . . . . . . . 16
Technical Data . . . . . . . . . . . . . . . . . . . . . .16

REF10 NANO
4
Precautions
General Instructions
To reduce the risk of fire or electrical shock, do not expose
this device to rain or moisture, direct sunlight or excessive
heat from sources such as radiators or spotlights. There are no
user-serviceable parts inside.
Any repair and maintenance may only be carried out by qua-
lified personnel authorized by MUTEC GmbH. The device was
designed for operation in a standard domestic environment.
Do NOT expose the unit and its accessories to rain, moisture,
direct sunlight or excessive heat produced by heat sources
such as radiators or spotlights! A free flow of air inside and in
close proximity to the unit must always be ensured.
Initial Operation
Prior to the initial operation of the device, the unit itself, its
accessories and packaging must be inspected for any signs of
physical damage that may have occurred during transit. If the
unit has been damaged mechanically or if liquids have been
spilled inside the enclosure, the device may not be connected
to the mains power or must be disconnected from the mains
immediately. If the unit is damaged, please do NOT return it to
MUTEC GmbH, but notify your dealer and the shipping com-
pany immediately. Otherwise, any liability claims will not be
granted.
If the device is left in a low-temperature environment for a
long time and is then moved to a room-temperature environ-
ment, condensation may occur on the inside and the exterior
of the device. To avoid short-circuits and electric shocks, make
sure to wait one or two hours before putting the device back
into operation.
Power Supply
The device contains a self-adapting, wide-range power supply
supporting the majority of global standard line voltages within
a range of 90-250 V, with no need for any user adjustments.
Make sure that your line voltage source provides a supply vol-
tage within the specified range. In addition, make sure that
the device is properly grounded via the local electric instal-
lation. Please use the enclosed power cable (see packaging)
to connect the unit to the mains power. Switch the unit off
before you attempt to connect it to the mains. Firstly, connect
the power cord to the device, then to a standard 3-pin mains
outlet. To remove the power cord never pull on the cable but
on the mains plug!
The unit must be grounded during operation! For information
on the power input module wiring, refer to the »Wiring of
connectors« section in the appendix. Disconnect the device
from the mains when not using it for an extended period.
Trademarks
MUTEC GmbH assumes no liability for any incorrect informa-
tion provided in this manual. Please note that all software/
hardware product names are registered trademarks of their
respective owners. No part of this manual may be reproduced,
copied or converted to a machine-readable form or electro-
nic media without written permission by MUTEC GmbH. We
reserve the right to change or improve our products without
further notice.
© MUTEC GmbH 2023
This symbol, a flash of lightning inside a triangle,
alerts you to the presence of non-insulated dan-
gerous voltage inside the enclosure - voltage that
may be sufficient to constitute a risk of shock.
This symbol, an exclamation mark inside a triangle
alerts you to important operating or safety inst-
ructions in this manual.
Declaration of Conformity
We herewith confirm that this product complies with the
European Commission’s standards on electromagnetic
compatibility.
Interference emission:
EN 50081-1, 1992, Resistance to interference: EN 50082-1,
1992. Presupposed as operation condition is that all signal
outputs are connected with
high-quality and well shielded
cables.

5
Warranty Regulations
§1 Warranty
MUTEC GmbH warrants the flawless performance of this pro-
duct to the original buyer for a period of two (2) years from
the date of purchase. If any failure occurs within the specified
warranty period that is caused by defects in material and/or
workmanship, MUTEC GmbH shall either repair or replace the
product free of charge within 90 days. The customer is not
entitled to claim an inspection of the device free of charge
during the warranty period. If the warranty claim proves to
be justified, the product will be returned freight prepaid by
MUTEC GmbH within Germany. Outside Germany, the pro-
duct will be returned with the additional international freight
charges payable by the customer. Warranty claims other than
those indicated above are expressly excluded.
§2 Warranty Transferability
This warranty is extended exclusively to the original buyer
who purchased the product from a MUTEC GmbH specialized
dealer or distributor, and is not transferable to anyone who
may subsequently purchase this product. No other person (re-
tail dealer, distributor, etc.) shall be entitled to give any war-
ranty promise on behalf of MUTEC GmbH.
§3 Warranty Regulations
The return of the completed registration card, or online regis-
tration on one of the websites specified below, is a condition
of warranty. Failing to register the device before returning it
for repair will void the warranty.
The serial number on the returned device must match the one
stated on the registration card or entered during online regist-
ration. Otherwise, the device will be returned to the sender at
the sender’s expense. Any returned device must be accompa-
nied by a detailed error description and a copy of the original
sales receipt issued by a MUTEC dealer or distributor.
The device must be returned free of shipping expenses and in
the original package, if possible; otherwise, the sender has to
provide comparably protective packaging. The sender is fully
responsible for any damage or loss of the product when ship-
ping it to MUTEC GmbH.
§4 Limitation of Warranty
Damages caused by the following conditions are not covered
by this warranty:
•Damages caused by every kind of normal wear and tear
(e.g. displays, LEDs, potentiometers, faders, switches,
buttons, connecting elements, printed labels, cover glas-
ses, cover prints, and similar parts)..
•Functional failure of the product caused by improper
installation (please observe CMOS components handling
instructions), neglect or misuse of the product, e.g. failure
to operate the unit in compliance with the instructions
given in the user or service manuals.
•Damage caused by any form of external mechanical
impact or modification.
•Damage caused by the user’s failure to connect and ope-
rate the unit in compliance with local safety regulations.
•Damage caused by force majeure (fire, explosion, flood,
lightning, war, vandalism, etc.).
•Consequential damages or defects in products from other
manufacturers as well as any costs resulting from a loss of
production.
•Repairs carried out by personnel which is not authorized
by MUTEC GmbH.
§5 Repairs
To obtain warranty service, the customer must call or write
to MUTEC GmbH before returning the unit. All inquiries must
be accompanied by a problem description and the original
buyer’s invoice. Devices shipped to MUTEC GmbH for repair
without prior notice will be returned to the sender at the sen-
der’s expense. In case of a functional failure please contact:
MUTEC Gesellschaft für Systementwicklung
und Komponentenvertrieb mbH
Siekeweg 6–8, 12309 Berlin, Germany
Phone: [phone]
Fax: [phone]
E-Mail: [email protected]
Web: www.mutec-net.com

REF10 NANO
6
Introduction
General Description
Thank you very much for your purchase of the MUTEC REF10
NANO an audiophile 10 MHz reference master clock generator.
The REF10 NANO is the focused version of an audiophile 10
MHz reference master clock in the superior quality you should
expect from clocking specialist MUTEC. It is based on the al-
ready well-established REF10, but transfers its technology,
praised by many customers and reviewers, into a new and
significantly lower price range.
With the REF10 NANO, dedicated music lovers are for the first
time able to significantly improve the sound performance of
their home digital audio system for a moderate investment.
Likewise, thanks to this MUTEC reference master clock, aspi-
ring studio owners can guarantee their customers maximum
sound quality when mastering and recording their music pro-
ductions. No matter which kind of playback setup the REF10
NANO is used in, a noticeable increase in transparency, spati-
ality and dynamics will be clearly audible in general.
The REF10 NANO can be directly connected to up to four 10
MHz compatible devices. DACs (D/A converters), network
switches, re-clockers, clock generators, CD players, servers or
streamers are perfect partners. In case these components do
not have a dedicated 10 MHz input, an MC3+ or MC3+USB
interface from MUTEC provides the necessary interconnecti-
on between the REF10 NANO and the audio equipment to
be synchronized. On the other hand, the REF10 NANO is the
perfect partner to an existing MC3+ or MC3+ USB. Together
they raise the signal’s audiophile quality – already improved
and re-clocked by the MC3+/MC3+ USB interface – to an even
higher level.
Features
•Audiophile 10 MHz reference generator with outstanding
low phase noise
•Improves and enhances compatible DACs, audio re-clo-
ckers, music servers and master clocks
•Handcrafted outstanding low phase noise OCXO, made in
Germany
•Four simultaneous usable reference clock outputs with 50 
(2x) and 75  (2x) impedance for maximum compatibility
•Galvanic isolation of the independently switchable BNC
clock outputs for optimum interference immunity
•Sub-Hz optimized, lowest noise power supplies for every
section of the circuitry
•Integrated international power supply
•DC power input to improve the REF10 NANO's noise per-
formance with help of an appropriate external power sup-
ply unit
•Self-explanatory user interface
•Optional mounting kit for installation in a 19” studio rack
(1RU)
•Developed and manufactured in Germany

7
Matching MUTEC Products
•MC3+
An audio re-clocker and master clock that provides low-jit-
ter clock audio signal generation and aggressive audio
re-clocking using MUTEC’s REVIVE technology.
•MC3+ USB
As the successor of the MC3+ , the MC3+ USB offers signi-
ficantly improved audio performance and an isolating USB
interface for audio computers and music servers.
•iClock & iClock dp
iClock and iClock dp are both synchronizable, highest pre-
cision clock synthesizers for audio/video production stu-
dios and broadcast.
Accessories
•MUTEC's Prime Select Cables line of 50  and 75  clock
cables in various lengths, exclusively approved by the
REF10 developer. Ask your retailer for further details!
Product Registration for Warranty and Support
We kindly ask you to register your MUTEC product through
our website immediately after buying. This ensures full war-
ranty services over a period of two years after purchasing the
product. Additionally, we provide free technical support for all
registered products. We will also inform you about new pro-
ducts and product updates (you may opt-out at any time of
course).
Please register your product at:
www.mutec-net.com > Service > Product Registration
Or for direct access type in the following URL into your
browser:
http://www.mutec-net.com/produktregistrierung.php?lng=en
Social Media
facebook.com/mutecpro

REF10 NANO
8
Installation
Shipping Contents
Your REF10 NANO was packaged carefully. Nevertheless we
recommend checking the contents directly after opening the
package:
1 x REF10 NANO
1 x Power cable
1 x DC cable connector
1 x Manual
In the unexpected event that there are any visible damages
or missing items, please refer to the chapter »Safety Instruc-
tions« and »Warranty Regulations« for further details.
Placing the Device
The unit should be set up as closely as possible to the devices
to which it will be connected to avoid excessive cable lengths.
The four custom-designed case feet include a rubber ring pro-
tecting the ground’s surface from being damaged and redu-
cing any structure-borne vibrations interfering with the unit.
It is recommended to keep the device away from vibrating or
mechanically moving devices in close proximity.
The device can be mounted into a standard 19“ rack and will
require 1U (rack unit). Therefore, we offer an optional rack
mounting kit. This includes two rack brackets which need to
be screwed to each side of the device‘s case. Before mounting
the device into a 19“ rack, please unscrew the four case feet
with a suitable screwdriver. Install the device so that 1U of
rack space is left open both above and below the device to
allow for sufficient ventilation! For extra secure installation
we further recommend an additional rack mounting plate that
will prevent any long-term mechanical deformation of the
enclosure.
Attention
Before installing the unit the section Safety Instructions
located at the beginning of this manual should be read
carefully! Never expose the device and accessories to
rain, moisture, direct sunlight, or excessive heat pro-
duced by radiators, heaters, or spot lights! Sufficient
air circulation in the proximity of the device must be
ensured!
Interface Connections
There are two standards with respect to interfaces and cable
termination for 10 MHz reference signals:
•50 Ω impedance termination
This standard can mainly be found among units by Asian
Hi-Fi manufacturers, and for measurement devices in labo-
ratory applications.
•75 Ω impedance termination
This termination is more common for devices used in re-
cording, mixing and broadcast studio applications.
For audiophile Hi-Fi and high-end consumer audio applica-
tions both standards are currently in use by different manu-
facturers. For this reason, the REF10 NANO provides clock out-
puts with both 50  and 75 Ω termination that can be used
simultaneously.
MUTEC's Prime Select Cables line offers with the PSC 50 BNC
and the PSC 75 BNC excellent matching clock cables with 50
 and 75  characteristic impedance in various lengths, exclu-
sively approved by the REF10 developer.
Additionally, MUTEC's Prime Select Cables of the PSC 50 BNC
series keep the specifications aligned to the CLF200/HDF200
standards, while the cables of the PSC 75 BNC series keep the
RG-59/U, RG-598/U as well as RG-216/U standards.
Ask your retailer for further details!

9
All interfaces of the devices in a given setup need to be proper-
ly connected with each other. Always ensure the clock output
of the REF10 NANO is connected to an appropriate input of
the receiving device. Make sure the clock input of the receiving
device has the correct internal impedance termination. This in-
ternal termination can sometimes be adjusted via an external
switch on the device or via a software setting. We recommend
double-checking the operating manual of any device that
you are planning the REF10 NANO to be connected to. A mis-
matched termination of the system will cause losses in signal
quality and clock precision!
We further recommend keeping the cable lengths as short as
possible to minimize signal losses and interference. Cables at
0.5 m to 1.0 m, or a maximum of 2.0 m length are ideal. The
longer the cable needs to be, the higher the quality should be
to avoid excessive losses!
BNC tee adapters are often used to daisy-chain clock signals
between several devices. Usually this is necessary if the clock
master does not provide a sufficient number of clock outputs.
Since the REF10 NANO generates low phase noise, i.e. highest
quality signals, any additional elements in the signal path can
have an attenuating effect that negatively affects the crucial
slew rate of the signal. Consequently and considering that the
REF10 NANO provides a total of four clock outputs we advise
against daisy-chaining 10 MHz clock signals.
Any device that is supposed to be clocked by the REF10 NANO
and benefit from its audiophile performance must be connec-
ted to a dedicated clock output!
Usage of the DC Power Input
The DC power input can be used alternatively to the mains
input. When a working DC power source is connected to this
input, the internal self-switching power supply automatically
turns off ensuring the exclusive DC power supply of the REF10
NANO. Depending on the low noise characteristics of the
connected DC power source unit, the noise performance of
the clock signals generated by the REF10 NANO can be further
improved (lowered), which helps to increase the audiophile
quality of connected devices.
A matching DC power cable connector is included in the scope
of delivery to speed up the assembly of the required DC power
cable for customers able to solder cables themselves.
We do not take over any functional guarantee when using
self-soldered DC cables for powering the REF10 NANO!
10 MHz compatible Products
To help you getting started in the »10 MHz universe« we
have put together a comprehensive list of currently available
10 MHz compatible devices on our website. Please go to the
REF10 NANO's description page to view the full list:
https://www.mutec-net.com/product_ref10_nano.
php#description!

REF10 NANO
10
Control Elements and Terminals
Front Panel
1) »POWER«
This red LED illuminates when the device has been powered
up. First engage the rear panel power switch next to the mains
terminal.
2) »SELECT«
This combined push button rotary encoder is used to select
the individual outputs and to disengage or re-engage them.
3) »OUTPUT«
These four white LEDs represent the four rear panel clock out-
puts and reflect if the respective output has been turned on
or off. An illuminated LED means the output is active, i.e on.
4) »POWER«
These two white LEDs indicate which of the two possible po-
wer sources is active. The REF10 NANO can be powered by
mains or DC power.
5) »OSCILLATOR«
This blue LED reflects the status of the oscillator heat-up pro-
cess. Upon powering the device up this LED will be flashing
until the oscillator has reached its correct operating tempera-
ture. Once the temperature has been established, the LED will
be permanently lit.
Rear Panel
1) »50 , Outputs 1– 2«
These two clock outputs are equipped with a 50 Ω terminati-
on. Use only BNC cables with the appropriate 50 Ω impedan-
ce with these outputs.
We recommend using the MUTEC PSC 50 BNC cable.
2) »75 , Outputs 3 –4«
These two clock outputs are equipped with a 75 Ω terminati-
on. Use only BNC cables with the appropriate 75 Ω impedan-
ce with these outputs.
We recommend using the MUTEC PSC 75 BNC cable.
3) »DC IN 15 V |1 A«
This is the DC power input connector accepting 15 V DC po-
wer. When a working DC power source is connected to this
input, the internal self-switching power supply automatically
turns off ensuring the exclusive DC power supply of the REF10
NANO. A matching DC power cable connector is included in
the scope of delivery.
4) »MAINS IN«, Power Switch + Mains connector (IEC)
This is the main switch for switching the device on and off.
Connect the supplied IEC power cable to the device‘s mains
connector. Make sure the power switch is turned off before
connecting the device to your power source finally. Line vol-
tages within the range of 90…260 V with a frequency of 50
or 60 Hz can be applied. The internal power supply will auto-
matically make all necessary adjustments.
Read the Safety Instructions at the beginning of this manual!
Attention
For detailed specifications of all interfaces, please refer to the
»Pin Assignment of the Connectors« and »Technical Data«
sections in the Appendix chapter.
2 3 4121 3 4 5

11
Operation
General System Operation
Operating the REF10 NANO is very straight-forward! Apart
from the power switche there is only a single push button
rotary encoder (»SELECT«) used to individually turn the four
outputs on or off. Per factory default all outputs are active
upon powering up the device for the first time, so all four
white front panel LEDs will light up accordingly.
Selecting and toggling the outputs
The front panel encoder’s action is stepped and each step will
evoke a new setting. The push button function of the encoder
is used to toggle features.
Rotate the encoder by one step to select an output and the
first LED will start flashing. Turning the encoder by another
step now will cause the next LED to flash while the previous
one returns to a steady light. Thus, it is only possible to select
one output at a time.
As long as an LED is flashing, the respective output can be
toggled with a push of the encoder. When the LED is on, the
output is active. When the LED is off, the output has been
disengaged. Any setting will have immediate effect - it is not
necessary to take any further actions.
The last setting of the REF10 NANO will be stored and preser-
ved after the device has been powered down.
Recommendations for the REF10 NANO
To ensure a long-lasting performance with optimum clock
signal quality that will best enhance your connected devices
we would like to share a few recommendations for using the
REF10 NANO.
•For best sound performance of the connected devices it is
useful to let the REF10 NANO burn-in for at least 14 days.
Thus, we recommend to leave the unit switched on for that
period of time.
•Prior to enjoying an in-depth listening session we recom-
mend pre-heating the REF10 NANO for about 20-30 minu-
tes. While the heater generally reaches its operating tem-
perature in about five minutes, the entire oscillator section
takes longer to fully warm up. To ensure optimal perfor-
mance and highest frequency stability, you should grant
your REF10 NANO this additional warm-up time.
•Keeping the REF10 NANO permanently powered up is ge-
nerally not required as long as you observe the extended
warm-up period described above. We do however advise
against power cycling the unit in short, repeated intervals!
•As a matter of principle, the REF10 NANO should not be
set up near mechanically vibrating devices. Although the
unit’s case feet are equipped with isolating rubber rings,
excessive structure-borne vibrations can nonetheless in-
terfere with the oscillator and negatively affect the clock
performance and signal quality.
The REF10 NANO should furthermore not be placed in close
proximity to devices emitting strong electromagnetic fields
(such as fluorescent lamps). Even though the electronics of
the unit are encapsulated in a steel enclosure these strong
electric fields can interfere with the sensitive electronics
and also negatively affect the signal quality.
•We generally recommend disengaging all clock outputs
that are not used for your given set-up to reduce poten-
tial interference as much as possible. Additionally, unused
and disengaged outputs can be fitted with so-called BNC
caps. These are available from various retailers and can be
used regardless of the termination impedance of the REF10
NANO's outputs.
Please note:
The use of so-called BNC terminators is not recommend as
these are straining the system unnecessarily. Thus, to pro-
tect or close BNC outputs not in use, please use BNC caps
only without internal termination resistor!

REF10 NANO
12
Applications
Using the REF10 NANO with other Products
This chapter serves to illustrate several possible applications for the REF10 NANO and will help you achieve the best possible
sonic results. In general the units can be used for the following applications:
•As an audiophile performance enhancement for compatible DACs, master clocks and audio re-clockers.
•As an low noise, high stability clock reference for the entire digital audio chain at home or in the studio.
•As an ideal high-end upgrade for MUTEC’s own MC3+, MC3+ USB and iClock/iClock dp audio re-clockers and master clocks.
•To stabilize existing audio clock generators.
To explain these applications it is important to understand the REF10 NANO is a reference master clock exclusively generating
highest quality 10 MHz clock signals. Compatible devices can use this precise reference clock signal to perform their own signal
processing with more accuracy and fewer errors, yielding a better sound quality. It is crucial to understand that these 10 MHz
clock signals are entirely independent from the audio clock (typically 44.1 kHz up to 192.0 kHz) of the playback! As a conse-
quence, the unit’s clock signal is not compatible with the common Word Clock audio clock that is also transmitted via 75 Ω BNC
cables.
There are two possible routes to harness the superior clock precision of the REF10 NANO in your digital audio system:
•You have a DAC, network bridge, streamer or audio re-clocker with its own 10 MHz compatible input.
•You have an audio master clock that can take the 10 MHz clock from the REF 10 NANO and convert it into a standard Word
Clock audio clock to be distributed to other devices.
The simplest possible application for the REF 10 NANO would look like this:
 
DAC
CD-PLAYER
SWITCH
STREAMER
10MHz Clock
10MHz Clock
10MHz Clock
10MHz Clock
© 2023 MUTEC GmbH

13
Thanks to a total of four clock outputs on the REF10 NANO any 10 MHz compatible device in a setup can and should receive its
own dedicated clock supply. We strongly advise against daisy-chaining multiple devices using so-called BNC tee adapters (more
about this on page 9).
Particularly, the combination of the REF10 NANO with MUTEC’s own MC3+ or MC3+ USB Smart Clocks offers exciting applica-
tions to achieve the best-possible quality enhancements by re-clocking digital music sources. To understand this scenario, please
imagine the following setup as a starting point:
In this application example we have two digital sources that are used to play back music via AES/EBU and USB interfaces. The
MUTEC MC3+ USB acts as audio re-clocker to enhance the audio signal and removes jitter before passing the audio into a DAC
(D/A converter) and a digital headphone amplifier. This is a simple closed system in which the audio clock rate is determined by
the music source. All other devices following in the chain (MC3+ USB, DAC, headphone amplifier) will adapt to the sampling rate
set by the source.
Within this particular system the MC3+ USB acts as core part to improve the system's overall sound quality. It exclusively is
connected to the REF 10 NANO to get its audio re-clocking performance enhanced even further.
 
DAC
COMPUTER
STREAMER
10MHz Clock
S/P-DIF
USB Audio
AES/EBU
AES/EBU
HEADPHONE
AMP
© 2023 MUTEC GmbH

REF10 NANO
14
Applications
We now look to pro-audio applications using the REF10 NANO as central master clock device.
The combination of the REF10 NANO with MUTEC’s own MC3+ or MC3+ USB Smart Clocks offers also within studio environ-
ments various possibilities of significant sound improvements for digital monitoring systems or the audio processing signal chain.
Within this application the REF10 NANO clocks the MC3+ USB to further improve the unit's noise performance. That enhances
the audiophile re-clocking process of the source signal supplied by the computer through the audio interface. Thus, excellent
monitoring quality for the sound engineer is achieved.
It is important to understand that the hierarchy with respect to the audio clock (i.e. the sampling rate) of the system remains unchanged.
The 10 MHz signal from the REF10 NANO does not make changes to the audio clock of the system. The sampling rate of the sys-
tem is still determined by the music source, which is important to know when playing back playlists with mixed sampling rates.
INTERFACE
DACSPEAKER
 
COMPUTER
USB Audio
AES/EBU
Analog
10MHz Clock
AES/EBU
© 2023 MUTEC GmbH

15
In that application example the REF10 NANO acts as master clock for the MC3+ USB. But this time not for improving the unit's
audiophile re-clocking capabilities, but for enhancing its Word Clock generation in two ways:
•Lowering the jitter of the generated Word Clock signals
•Increasing the unit's clock accuracy
The MC3+ USB now works as Word Clock master clock for the audio mixer supplying a Word Clock signal not only of lowest jitter,
but also with highest timing accuracy.
In this application, the audio clock rate is determined by the MC3+ USB, setting the master clock rate for the mixer, who then
supplies the master clock for the whole music mix.
 
COMPUTER
SPEAKER
Analog/Digital USB Audio
Analog
10MHz Clock
Word Clock
LIVE MIXER
© 2023 MUTEC GmbH

REF10 NANO
16
Appendix
Pin Assignment of the Terminals
Mains
1) Neutral (N)
2) Protective Earth (E)
3) Live, Phase (P)
Technical Data
Clock Outputs:
•2 x BNC, unbalanced, 50  terminated, galvanically
isolated, buffert
•2 x BNC, unbalanced, 75  terminated, galvanically
isolated, buffert
Clock Signal Format of all Outputs
•Square wave, 10.000 MHz, ≈2 Vpp, ≈1 V RMS,
50:50 duty cycle
Clock Generation:
•Type: 10.000 MHz low phase noise oven-controlled crystal
oscillator
•Frequency accuracy when shipped: < ±0.01 ppm
•Frequency stability vs. temperature range: < ±0.01 ppm
within -20 °C to +70 °C (-4 °F to +158 °F)
•Short term stability (Allan Deviation, typically Tau = 1s):
2 ×10-12
•Aging after 30 days operation: : < +/-0.0002 ppm (per
day), < +/-0.03 ppm (first year), < +/-0.2 ppm (ten years)
•Warm-up time at +25 °C (+77 °F): <5 min
Phase Noise measured at REF10 NANO's Clock Outputs (!):
•1 Hz: ≤ -112 dB/c
•10 Hz: ≤ -142 dB/c
•100 Hz: ≤ -158 dB/c
•1000 Hz: ≤ -164 dB/c
•Noise Floor: ≤ -167 dB/c
Jitter measured at REF10 NANO's Clock Outputs (!):
•1-100 Hz: ≈30 fs
(Disclaimer: All measurement figures represent average values. Minor pro-
duction related deviations will be expected.)
Mains Power Supply:
•Type: internal, self-switching power supply
•Input voltages: 85-305 V, 50-60 Hz
•Power consumption: 7 W during oscillator warm-up,
4 W nominal operation (all outputs terminated)
BNC Output 50/75 ΩDC Power Input
1) Signal
2) Ground
1) Signal
2) Ground
1
2
3
2
1
1
2

17
DC Power Supply:
•Input voltage: 15 V, +/-0.5 V
•Power consumption: 7 W during oscillator warm-up,
4 W nominal operation (all outputs terminated)
Mechanical Details:
•Enclosure size/material/color: 196 x 42 x 300 mm (W x H x
D, without connectors and case feet), 1.0 mm steel, black
powder-coated
•Front panel size/material/surface/color: 198 x 44 x 6 mm
(W x H x D), aluminium, anodized incl. anodic printing or
silk screening, color: silver or black
•Weight: approx: 2070 g (4.6 lb, 73 oz)
REF10 NANO Order Information:
•Silver Front: Item No. 8015-115,
EAN Code: 4260342461242
•Black Front: Item No. 8015-116,
EAN Code: 4260342461259