EMC Professional - Gude Analog

EMC Professional 

DCF77 radio clock 

for Industrial Applications 

Manual

Manual EMC Professional 

TABLE OF CONTENTS 

1 Description ..........................................................................3 

2 Hardware..............................................................................4 

2.1 Scope of delivery................................................................................ 4 

2.2 Connection and starting ..................................................................... 4 

2.3 Display................................................................................................ 5 

2.4 Antenna pointing................................................................................. 7 

3 Software...............................................................................9 

3.1 General............................................................................................... 9 

3.2 Usage under Windows 95/98/ME/2000/NT/XP .................................. 9 

3.2.1 Installation of the Software.......................................................... 9 

3.2.2 Windows Software .................................................................... 10 

3.2.2.1 Settings......................................................................................... 10 

3.2.2.2 Software window .......................................................................... 11 

3.2.3 Logmode ................................................................................... 12 

3.3 Operation under Linux/Unix.............................................................. 14 

3.3.1 NTP Installation......................................................................... 14 

3.3.2 NTP Configuration..................................................................... 15 

3.3.3 Start NTP .................................................................................. 15 

3.3.4 NTP Status................................................................................ 16 

3.4 Operation under DOS und Windows 3.x .......................................... 18 

4 Configuration ....................................................................20 

4.1 General............................................................................................. 20 

4.2 Overview........................................................................................... 21 

4.3 Time Protocol ................................................................................... 21 

4.3.1 Protocol with XNTP Configuration ........................................... 21 

4.3.2 Protocol with Gude configuration .............................................. 22 

5 Firmware ............................................................................23 

6 Support ..............................................................................24 

2 Gude Analog- und Digitalsysteme

EMC Professional Manual 

1 Description 

The PTB in Braunschweig (Germany) runs one of the most accurate atomic 

clocks in the world. It deviates less than one second in 300 000 years. Time 

and date are transmitted by the "DCF77" transmitter near Frankfurt/Main 

(Germany) at a frequency of 77.5 kHz. 

The signal can be received over a distance of about 2000km. 

EMC Professional receives the signal via the ferrite antenna and decodes 

time and date. Depending on the configuration UTC or MEZ/MESZ time 

information will be transferred to the PC once per minute or once per 

second (see also 4 Configuration, p. 20). 

EMC Professional was developed for the use in an electromagnetic 

disturbed environment. Therefore it is equipped with special receiving 

electronics: 

PLL-Receiver 

4 Quarzes 

Interfrequency 

A/D-Conversion 

Digital Filter 

Signal Intensity Display 

Signal monitor with LEDs 

Fuzzy-Logik Evaluation 

If the time signal is too weak or if it can not be received at all EMC 

Professional switches automatically to the integrated quarz clock. As soon 

as the receive is good enough, EMC Professional switches back to radio 

controlled mode. That means the PC is synchronized continuously. 

Gude Analog- und Digitalsysteme 3


2 Hardware 

2.1 Scope of delivery 

Included in delivery: 

Receiver 

Power Supply unit (with tabletop unit) and cable for non-heating 

apparatus (with 19’’ version) respectively. 

serial cable 

Adapter (RS232 9pol. to RS232 25pol.) 

Manual 

CD-ROM with software 

Ferrite antenna (only with EMC Professional Set) 

2.2 Connection and starting 

Connect the antenna and the power supply or cable to EMC Professional. 

Then connect the receiver to a serial port of the PC. 

Power supply unit 

PC with serial ports 

Connection of EMC Professional 

Ferrite antenna 



2.3 Display 

After power on the current configuration is displayed for some seconds at 

the LC-Display (see also 4 Configurations, p.20). Afterwards the receiver 

switches to the mode Check. In this mode the received signal is converted 

into the time information. The current second, the evaluated bit of the 

preceeding second ("0", "1", "?" or "S" for the 59th Sync-Bit) and the 

calculated correlation value are displayed. A negative correlation value is 

evaluated as "0", a positive as "1". The correlation value should be either 

extremly low (-200) or extremly high (+200). Minor values mean a lower 

quality of the received signal, but by evaluating several succeeding minutes 

the time signal can be decoded. 

The field intensity is displayed in the bottom line of the LC-Display. Values 

higher than 1.9 are sufficient for receiving the time signal. A value of 4.0 or 

higher means a very high quality of the received signal. (There are some 

cases in which disturbances can cause a high filed intensity, please see 

also Tips for good receive, p. 8). 

After about 2 minutes the signal should be received regularly. After another 

minute EMC Professional switches to the next mode. At the display the 

following values are shown: 

Sek: Fehler: Puffer: FS= 

Sek: counts seconds from 0 up to 59 and shows the received time. In 

case of bad receive the counter starts again with 0. 

Fehler: (Errors) is the number of incorrect bits. According to the 

following scheme it is decided wether a time information is valid or not. 

Minutes in Puffer 1 2 3 4 5 6 7 8 9 10 

Incorrect bits 0 0 5 10 15 20 25 30 35 40 

That means the time is seen as valid if less than x incorrect bits are in 

the buffer after y minutes. In case of more incorrect bits EMC 

Professional switches to quarz mode. 



Example: 

After 3 minutes 4 incorrect bits are in the buffer. The received time is 

seen as valid. After 8 minutes 32 incorrect bits are in the buffer. The 

received time is seen as invalid and EMC Professional switches to 

quarz mode. 

Puffer: starts with 01 and shows how many minutes are stored in the 

internal buffer. Up to 10 minutes can be stored and used for evaluation. 

FS: is the field intensity. The displayed value should be greater than 1.9. 

A value of about 3.0 or greater indicates a good quality of the received 

signal. In case of resonance the value can be up to 7.0, but this is not 

critical. 

When the quality of the received signal is good the display changes to 

ok F=xx (xx is the number of incorrect bits in the buffer). 

From now on the time protocol is transmitted to the serial interface once a 

minute or once a second, depending on the configuration (see also 4 Configuration, 

p.20). If the number of incorrect bits exceeds the allowed 

maximum (see scheme on the left side) EMC Professional switches to the 

integrated quarz clock. (Usually the last 10 minutes are in the buffer, so the 

allowed number of incorrect bits is 40.) 

Note: If the received day of week does not fit to the received date the error 

number is set to 99. 

If more than 40 errors are in the buffer after 10 minutes, EMC Professional 

reboots automatically. 



2.4 Antenna pointing 

The quality of the time signal depends on the local environment. Mountains 

and reinforced concrete buildings weaken the signal and electrical devices 

like monitors may disturb it. 

To make a regular receive possible even in an electromagnetic disturbed 

environment EMC Professional is equipped with a high quality receiver 

electronic. 

After the receiver has been switched on it takes about 5 seconds (up to 60 

seconds if the signal is very weak) until the time signalfrequency is 

adjusted. (During thunder the DCF77 transmitter near Frankfurt in Germany 

may be turned off.) 

After changing the antenna’s position it takes about 4 seconds until the 

value is updated. 

To improve the receive please note the following tips: 

the antenna should not be placed 

near metal or other magnetical 

conducting materials. 

the antenna should be placed near 

a window or outside (for example 

in case of reinforced concrete 

buildings) 

the antenna should not be aligned 

parallel to telephone circuits 

the antenna should be aligned 

horizontally (see pictue) 

Disturbances can either be exactly 

at 77,5 kHz or be impulse disturbances 

with parts at 77,5 kHz. 

The signal spreads out circularly from 

the transmitter in Mainflingen near 

Frankfurt. Therefore the receive is best 

if the antenna is aligned horizontally. 

That means the antenna should not 

point to Frankfurt but lie sideways to it. 

Please check the horizontal refreshrate of the monitor. It may not be 

about 77 kHz. 



In case of good receive the signal monitor display is in the upper third and 

falls down in the lower third for a short time once a second. The "V.24" LED 

of the EMC should blink yellow every second or once a minute depending 

on the configuration (see also 4 Configuration, p.20). The "Takt" (metre) 

signal should blink red every second and the "Funkzeit" (radiotime) signal 

should be continuously green. The field intensity, which is displayed in the 

bottom line of the display, should be greater than 1.9. A good position is 

found if the field intensity is 3.0 or greater. 



3 Software 

3.1 General 

Software for DOS und Windows 3.x/95/98/ ME/NT/2000/XP is included. 

With Firmware 4.0 and higher EMC Professional can be used under 

Unix/Linux with the free available XNTP package (see also 5 Firmware, 

p.23). 

Software for Novell Netware is available on request. 

3.2 Usage under Windows 95/98/ME/2000/NT/XP 

3.2.1 Installation of the Software 

EMC Professional is delivered with software, which is suitable for all WIN32 

versions. The software runs on Windows NT/2000/XP systems the same 

way it runs on Windows 95/98/ME systems, which means it is not able to be 

started as NT Service. 

If the installation program does not start automatically start the program 

SETUP.EXE manually. After installation W32EMC.EXE can be started. After 

having chosen the ComPort EMC Professional is connected to the PC’s 

time is synchronised regularly. 

In Networks the software has to be installed at the PC EMC Professional 

is connected to. Workstations can get the time from this Windows host 

by using the command line tool net time (net time \\server_name 

/set /yes) or by using the integrated NTP time service of Windows 

NT/2000/XP (more informationen can be found at our website). 



3.2.2 Windows Software 

3.2.2.1 Settings 

The following settings can be modified: 

• COM-Port: All available Com-Ports are shown here. Select the 

Com-Port the receiver is connected to. 

• Colors: Here colors for the program components can be chosen. 

This is helpful e.g. when using notebooks. 

• max. offset: If this option is enabled your PC system time will only 

be adjusted when the difference between system time and received 

time is less than 90 minutes. This option should only be used when 

the receive is very bad. Please read also the information in the 

online help. 

• Language: The program language can be chosen here. 

• Sync-Frequenz: The interval in which the software should read 

data from the Com-Port and adjust the system time can be 

configured here. The interval should not be too small to avoid 

unneccessary processor load. The interval of “V.24 transmission” 

depends on the configuration (see also 4 Configuration, p.20) 

• Time shift: A time shift in hours can be entered here. 

• Speichern: Stores the current settings. 

3.2.2.2 Restart.. 

If the transmission frequency of the device was changed during runtime of 

W3EMC.EXE, this command restarts the detection of the EMC Professional. 

That can last up to 3 minutes in case of minute-by-minute transmission (see 

also 4 Configuration, p.20). The same effect can be achieved by restarting 

the software. 



3.2.2.3 Software window 

DCF77-State 

System time: Day of week, date and local time of the PC are displayed in 

this field. 

Last received: The last valid DCF77 time that was received is displayed 

here. (Time of the last synchronisation). 

Operating mode: The operating mode of the EMC Professional is 

displayed here ("Quarz Mode" or "Radio Mode"). 

"Radio Mode" means that the EMC Professional can receive valid DCF77time 

signals. 

"Quartz Mode" means that the 

receiver can not receive the 

DCF77 time signal or that the 

received signal has too many 

bit errors. Please improve the 

adjustment of the antenna if 

the receiver is running in 

"Quarz Mode" very often (see 

also page 8). 

Incorrect Bits: Number of incorrect 

bits. EMC Professional 

switches to "Quarz Mode" if 

more than 40 bit errors occur 

during 10 minutes. As soon as 

the number of incorrect bits is 

less than 40 EMC Professional 

switches back. 

The Windows software W32EMC.exe. 

Announcements: 

Announcements of the DCF77 time transmitter are displayed here. (E.g. the 

announcement of leap seconds, daylight saving time change etc.) 



V.24 

V.24 State: State of the data transmission on the serial interface 

(ComPort): 

"active": The time protocol can be received and the system time is 

adjusted. If there is no addition like "active in ... seconds" time is 

synchronised every second or every minute depending on the 

configuration (see also 4 Configuration) 

"no receive!": No signal can be received at the selected ComPort. 

Please check whether the correct ComPort is selected and the connection 

between EMC and PC is allright. 

Attention! When using Gude60s, GudeUTC60s or XNTP configuration 

"No receive" will also be displayed between the synchronisations (once 

a minute (see also 4 Configuration). 

"No ComPort selected": No ComPort has been selected yet. Please 

choose Settings| Com Port and select the Com-Port the receiver is 

connected to. 

Interface: The number of the selected ComPort. 

Log: The last time protocol received is displayed as ASCII string in this field 

(see also 4.3 Time protocol, p.21). 

3.2.3 Logmode 

With the software of EMC Professional it is possible to log the received time 

infomation and error messages. That can be important e.g. to find causes 

of bad receive. To run EMC Professional in log mode the command line tool 

"-l" has to be used. 

For example: c:\programme\EMCprof>w32emc –l 

When EMC Professional is running in log mode "-l" is displayed in the 

upper line of the software window. 



When runnig EMC Professional in log mode the time protocol is written into 

the file logfile.emc. The log file is located in the same directory like the 

software W32EMC.EXE. 

Example logfile: 

************************************************************************************ 

* (c) Gude Analog- und Digitalsysteme 

* support@gudeads.com 

* 

* LogFile WinEMC v2.3.12 

* 

General information 

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 

Logging startet : Fr, 03.12.2004; 13:47 

current TimeZone : Westeuropäische Normalzeit 

HostName : Server1 

Number of CPUs : 1 

CPU type : Pentium II 

OS Info : Windows 2000 (8), Version 5.0 

Build : 2195 

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 

16914000 : receiving ... 

16914000 : TimeShift set to 0 h 

16914000 : Sync Frequency set to 0 min. 

16914000 : maximum allowed difference from DCF to Systemtime : 90 

16914000 : Language set to German! 

16914625 : D6 

16915625 : D7 

16916625 : D8 

16917625 : D9 

16918718 : W32EMC.EXE is going to exit! 

„F“ in the middle means that EMC Professional is operating in radio mode. 

When EMC Professional is operating in quarz mode a „Q“ could be seen 

here. The exact meaning of a row can be found under 4.3.2 Time protocol 

with Gude Configurations, p.22. 



3.3 Operation under Linux/Unix 

EMC Professional with Firmware 4.0 and higher can be used under 

Linux/Unix with the free available XNTP package (see also 5 Firmware, 

p.23). NTP means Network TimeProtocol. It is used to synchronise 

workstations over TCP/IP with each other. This information can be used 

with a client program which synchronises the PC’s clock with the servers 

time. Windows 2000 and Windows XP can be installed as NTP client/server 

without additional software. 

The TCP or UDP port 123 is used for the transmission. With XNTP it is 

possible to built up your own NTP server which polls EMC Professional at 

the ComPort and provides the time and date information in the network. 

3.3.1 NTP Installation 

The free available XNTP is delivered with most of the Linux distributions. 

Unfortunately the needed drivers (Reference Clock Drivers) are missing 

mostly and XNTP will not work properly. Therefore we recommend to install 

the latest version (free available in the internet). 

The installation of a RPM is done with the "RedHat Package Managers": 

rpm -i xntp.rpm 

If you only have the source package the XNTP Daemon must be compiled 

first. Uncompress the TGZ package with: 

gzip -d ntp-4.2.0.tar.gz && tar -xvf ntp-4.2.0.tar 

and change in the new directory created by tar. Build a Makefile with the 

command: 

./configure --enable-HOPF6021 

the sources can be compiled with: 

make 

to install the Binaries enter: 

make install 

After successful installation NTP can be configured. 



3.3.2 NTP Configuration 

Connect EMC Professional to a free serial ComPort. Create a symbolic link 

/dev/refclock-0 which links to the port EMC Professional is connected 

to. If it is connected to Com2, /dev/refclock-0 must be linked to 

/dev/ttyS1: 

ln -s /dev/ttyS1 /dev/refclock-0 

Now /etc/ntp.conf has to be set to the correct driver module. Here a 

sufficient config: 

server 127.127.8.0 prefer mode 12 

logfile /var/log/ntp 

logconfig =all 

driftfile /var/log/ntp.drift 

That means NTP gets the time info from driver 12 of the group 8 (RAW 

DCF). For testing purposes you can choose the server 127.127.1.0, which 

stands for the host's local clock. 

3.3.3 Start NTP 

The XNTP Daemon /usr/local/bin/ntpd can be started like any other 

Binary. Suse Distribution provides an automatical XNTP start with the help 

of the configuration tool YAST. 

To configure starting of XNTP manually the script xntpd should be available 

in the directory /etc/rc.d/init.d. This is used to start and stop the 

Daemon /etc/rc.d/init.d/xntpd start or /etc/init.d/xntpd 

start and /etc/rc.d/init.d/xntpd stop or /etc/init.d/xntpd 

stop. 



After a successful synchronisation the following logfile entries will appear: 

ntpd[1103]: PARSE receiver #0: packet format "hopf Funkuhr 6021" 

ntpd[1103]: PARSE receiver #0: STATE CHANGE: -> TIME CODE 

ntpd[1103]: PARSE receiver #0: SYNCHRONIZED 

ntpd[1103]: clock GENERIC(0) event 'clk_okay' (0x00) 

.................................... 

ntpd[1103]: time reset -0.745079 s 

The Linux PC’s CMOS clock is now synchronised with the received time 

signal. With client programs on the workstations the Linux PC can now be 

used as NTP server in the LAN. 

3.3.4 NTP Status 

The status of a running xntp server can be requested by using the shell 

command ntpq. To get an exact status of the receiving quality you have to 

use the program ntpq (ntpq -c clocklist): 

status=0000 clk_okay, last_clk_okay, 

device="HOPF 6021", 

timecode="\x02\x0c\x09150700070703\x0a\x0d\x03", 

poll=2, noreply=0, badformat=0, baddata=0, fudgetime1=0.000, 

fudgetime2=0.000, stratum=0, refid=DCF, flags=0, 

refclock_time="c2b40b14.00000000 Mon, Jul 7 2003 15:07:00.000 

UTC", 

refclock_status="TIME CODE", refclock_format="hopf Funkuhr 6021", 

refclock_states="*NOMINAL: 00:30:41 (94.46%); NO RESPONSE: 

00:01:48 (5.54%); 

In this example the clock receives at high quality for about 30 minutes at a 

total running time of about 32 minutes. This corresponds to 94.46%. 



ntpq -c peers localhost 

With the command peers the active reference clocks will be indicated line 

by line in a table. A star "*" in front of a line indicates that this peer is the 

current time reference: 

remote refid st t when poll reach delay offset jitter 

================================================================== 

GENERIC(0) .DCF. 0 l 5 64 1 0.000 22.846 0.008 

• remote listing of all available time servers (ntp.conf) 

• refid reference number 

• when when the last request has taken place (in seconds) 

• poll interval in which the time server is queried 

• offset difference between system time and reference time (in 

milliseconds) 



3.4 Operation under DOS und Windows 3.x 

The software DCFTSR.COM is located in the directory dos_win3 of the CD 

ROM. Copy this file to the PC the EMC Professional is connected to. 

The program has the following options: 

/2 The serial port COM2 (I/O address 2F8h, IRQ 3) is used. If this 

option is left out the software uses COM1 (I/O address 3F8h, IRQ 

4). 

Hint: Other I/O addresses and interrupts can be used by 

patching the driver DCFTSR.COM. This should only be done by 

advanced users. The I/O address is in the 4th byte (LSB) and 5th 

byte (HSB), the interrupt in the 6th byte (allowed IRQs are 2..7). 

After patching the driver the option /2 must not be used. 

/H The driver gets active only once an hour. Without this option the 

driver synchronizes the PCs time and date every minute or 

second (depending on the configuration). 

/N The time of up to 8 fileservers in a Novell Netware network is 

additionally synchronised with the received time signal. The PC 

must have a connection to the servers. 

Hint: A LOGIN connection exists to one server only. To all other 

servers an ATTACH connection is required. ATTACH connections 

are defined either in the LOGIN script of the system or the 

user. The Netware command WHOAMI gives information about all 

servers to which a connection exists. SLIST shows all servers 

available in the network. 

The user must have CONSOLE operation rights on all the 

servers. The driver software itself prohibits the abuse of the 

extended right if it is loaded. If a user should have CONSOLE 

opration rights after the driver has been loaded the option "/ C" is 

required. A message is displayed on the server if the time has 

been set. This message is supressed if both the old and new time 

are the same. 

/W No switching from normal time to daylight time. This option is 

neccessary if a time base like the UTC is required. 



/+xx Adds/Substracts xx hours (maximum 22) to the received time. 

/+01 adds 1 hour, /-01 subtracts 1 hour. 

Add the driver to your AUTOEXEC.BAT file: 

[Drive:][Path]DCFTSR.COM /H /W /-01 

activates the driver on COM1, IRQ4. The time is updated once an hour. 

Switching from normal time to daylight time is suspended. One hour is 

substracted from the received time. The driver stays active after starting 

Windows 3.x and synchronises regularly the PCs time and date with the 

received signal. 



4 Configuration 

4.1 General 

The configuration determines the synchronisation interval (once per second 

or once per minute) and the kind of time information (MES/MESZ or UTC). 

When starting EMC Professional the current configuration is shown at the 

display. “Gude” is the default configuration. 

To change the configuration the switch setting must be changed. An 

overview of the different configurations and switch settings is on the 

opposite site. 



4.2 Overview 

Configuration: Gude Gude60s Gude- 

UTC 

Operating 

system: 

DOS, Windows, Novell Netware 

Gude- 

UTC60s 

Parameter: 9600 Baud, 8 Bit, no Parity, 1 Stop bit 

Transferred time: MEZ / MESZ UTC 

Transfer intervall 

at the serial port: 

Switch: 

4.3 Time Protocol 

Once a 

second 

Once a 

minute 

4.3.1 Protocol with XNTP Configuration 

(STX)(C)(B)(time)(date)(LF)(CR)(ETX) 

Once a 

second 

XNTP 

Linux, 

Unix 

Once a minute 

8421 (C) 8421 (B) 

xxx0 no Announcements 1xxx UTC 

xxx1 announcement (NT-DT-NT) x001 Monday 

xx0x normal time (NT) x010 Tuesday 

xx1x daylight saving time (DT) x011 Wednesday 

00xx time/date invalid x100 Thursday 

01xx quarz mode x101 Friday 

10xx radio mode x110 Saturday 

11xx high precision radio mode x111 Sunday 

(Time): HHMMSS, e.g. 094048 09.40 Uhr and 48 sec. 

(Date): DDMMJJ, e.g. 311299 31.12.1999 



4.3.2 Protocol with Gude configuration 

PP 

< start charakter 

hh hour 

mm minute 

TT day 

MM month 

YY year 

W day of week (1=monday, 7=sunday) 

Z mode (F=radio mode, Q=quartz mode) 

FF number of incorrect bits (while EMC is in quartz mode always 00, in 

radio mode max. 40) 

S daylight saving time (1=summer, 0=winter) 

U announcement of switching between daylight saving time and normal 

time the hour before (0 / 1) 

A announcement of a switching second one hour before (0 / 1) 

000 reserved, presently 0 

KK seconds 

> end character 

PP checksum over all characters including “”, in hexadecimal 

notation 

Beispiel: D4 

11.41 Uhr; 12.04.2005; So; Funkbetrieb, 0 Fehler, Sommerzeit 

Depending on the configuration the time information is MEZ / MESZ or 

UTC. 

The message is followed by a CR (Code 13) and LF (Code 10). A 

transmission protocol is not active. The PC must be able to read the 28 

bytes data without interruption. This is usually no problem if the IRQ of the 

serial interface is used. 



5 Firmware 

EMC Professional’s case must be opened to change the firmware. The 

electronic components inside (including the EEPROM) are electrostatic 

sensitive devices. Therfore the firmware ought to be changed by qualified 

persons only. Please notice that we do not admit warranty for any harms 

due to improper use. 

Turn off EMC Professional first. If 

EMC Professional is connected to 

any other electrical device this 

device must be turned off as well. 

Afterwards the serial cable should 

be disconnected. The top of EMC 

Professional’s case is fixed with screws to its front and back side. Unscrew 

them and open the top of the case (see figure above). 

The Eeprom is located at the 

board’s upper right corner 

(see figure). Take the old 

EEPROM out of the socket 

and insert the new one. Mind 

the correct position of the 

notch in the EEPROMs case. 

Caution! The pins of the 

EEPROM can easily be 

broken. Close the case and 

connect EMC Professional to 

the PC again. When starting 

EMC Professional the present 

firmware version will be displayed. 

A Firmware Update is available on request. 



6 Support 

The windows software contains a detailed online help menu with more 

information on EMC Professional and a detailed FAQ list. 

The latest software is free available at our website www.gude.info 

If you have further questions please contact our team: 

Eintrachtstraße 113 

50668 Köln 

Tel.: 0221/ 912 90 97 

Fax: 0221/ 912 90 98 

info@gude.info 

http://www.gude.info/

EMC Professional - Gude Analog

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?