Symetrix 9022 User manual

9022 2x2 DSP Engine
User’s Guide
9022

i
Table of Contents
Chapter 1 Introduction 1
Chapter 2 Operator Safety Summary 2
Chapter 3 Hardware Installation 3
Chapter 4 Front & Rear Panel Controls 4
Chapter 5 Audio Workplace Installation 8
Chapter 6 Using Audio Workplace 10
Chapter 7 Specifications 17
Chapter 8 Block Diagram 18
Chapter 9 Warranty & Service 19
Appendix A Hexadecimal Conversion Tables 21
Appendix B Declaration of Conformity 23
RevA.03,2March,2000
Symetrixpartnumber5390220A03
Subject to change without notice.
©2000,Symetrix,Inc.Allright reserved.
SymetrixisaregisteredtrademarkofSymetrix,Inc.
Mention of third-party products is for informational
purposes only and constitutes neither an endorsement
nor a recommendation. Symetrix assumes no responsibility
with regard to the performance or use of these products.
Under copyright laws, no part of this manual may be
reproduced or transmitted in any form or by any means,
electronic or mechanical, including photocopying,
scanning, recording or by any information storage and
retrieval system, without permission, in writing, from
Symetrix,Inc.
6408 216th St. SW
Mountlake Terrace, WA 98043
Tel [phone]
Fax [phone]
Email: [email protected]
9022

9022
1
IntroductionChapter 1
The Symetrix 9022 2x2 DSP Engine is a programmable DSP processor intended for the installed
sound market. Symetrix Audio Workplace software provides real-time control over multiple audio
functions from a Windows 95/98 PC environment.
Audio Workplace allows you to configure, program presets, adjust parameters, or download new
DSP code in the field. The 9022 has a minimal front panel; Audio Workplace provides a virtual
front panel via your computer. After setup and configuration, the settings remain stored inside the
9022’s non-volatile memory. The virtual front panel disappears with your PC. This leaves the
chassis tamper-proof.
The 9022 is a two-channel processor. Each channel has EQ, high- and low-pass filtering, delay,
and multiband compression and limiting available. There are two inputs and two outputs. The
processor’s user interface imitates a dual-row, 8-slot card frame. The highly intuitive user interface
allows you to drag and drop processor blocks into the frame, and to interconnect them. Don’t
worry about what works and what doesn’t; the software has been designed to prevent mistakes and
simply won’t allow an incorrect interconnection.
You’ll need the following items to use and control the 9022:
· The 9022 and the Symetrix Audio Workplace software.
· A PC computer running the Microsoft Windows 95 or 98 graphical operating system. The
computer must have an unused serial (COM) port. If you’re starting from scratch, install
Windows first, and make sure that it is running before trying to install the Audio Workplace
software.
· Processor requirements are determined by your version of the Windows operating system.
· You should have at least 16 Mb of RAM.
· You need at least 2 Mb of free space on the computer’s hard drive.
· The display subsystem should use at least 64K colors (also known as 16-bit high-color) and
should also be set to use small fonts.
· A suitable interconnect cable from the computer’s serial port to the 9022’s front-panel
RS-232 connection. The cable needs to have pins 2, 3, 4, and 5 wired between the male and
female connectors (2 to 2, 3 to 3, 4 to 4, 5 to 5).
You can install and run the Symetrix Audio Workplace software without having a 9022 connected.
Refer to the Hardware Installation section (pg. 3) to install the 9022. Refer to the Software
Installation section (pg. 8) to install the Symetrix Audio Workplace software.
This printed guide describes the 9022’s features and how to install it. For further product and usage
information, consult the HELP menu available in the Audio Workplace program. Please report any
bugs or inconsistencies with the hardware, the software, or this guide to:
Phone: [phone]
Fax: [phone]
Email: [email protected]
Web site: www.symetrixaudio.com
Front panel
Rear panel
CH1 CH2
CLIP
BYPASS
SIGNAL
CLIP
BYPASS
SIGNAL
INPUT
COMMPOWER
RS-232 CONTROLSYSTEM STATUS
21
65
34
87
TM
AUDIO WORKPLACE
9022
2X2 DSP ENGINE
PRESET
TM
CH1 INPUT
LYNNWOOD, WA, USA
MANUFACTURED IN
THIS UNIT CONTAINS NO
2X2 DSP ENGINE
9022
USER SERVICEABLE PARTS
AUDIO WORKPLACE
CH1 INCH2 IN
CH2 INPUT
CH1 OUT
CH2 OUTPUT
CH2 OUT
CH1 OUTPUT
78
REMOTE PROGRAM SELECT
876
561234
54312
HOST PORT
UPSTREAM
SLAVE PORT
DOWNSTREAM
DEVICE
TM
PS3E POWER
SUPPLY ONLY.
CONNECT TO
SYMETRIX PS3 OR
RÉFÉREZ TOUTE RÉPARATION À UN TECHNICIEN QUALIFIÉ.
AUDIO WORKPLACE
9022
FABRIQUÉ AUX E.-U. PAR SYMETRIX INC., LYNNWOOD, WASHINGTON.
ADDRESS

2
9022
Operator Safety Summary Chapter 2
Terms
Several notational conventions are used in this
manual. Some paragraphs may use Note, Caution,
or Warning as a heading. Certain typefaces and
capitalization are used to identify certain words.
These are:
Note Identifies information that needs
extra emphasis. A Note generally
supplies extra information to help
you to better use the 9022.
Caution Identifies information that, if not
heeded, may cause damage to the
9022 or other equipment in your
system.
Warning Identifies information that, if
ignored, may be hazardous to your
health or that of others.
CAPITALS Controls, switches or other markings
on the 9022’s chassis.
Boldface Strong emphasis.
Equipment Markings
AVIS: NE PAS OUVRIR
Il ne se trouve a l’interieur aucune piece pourvant entre reparée l’usager.
SEE OWNERS MANUAL. VOIR CAHIER D’INSTRUCTIONS.
S’adresser a un reparateur compétent.
RISQUE DE CHOC ELECTRIQUE
N
o user serviceable parts inside. Refer servicing to qualified service personnel
.
CAUTION
WARNING: TO REDUCE THE RISK OF FIRE OR
ELECTRIC SHOCK DO NOT EXPOSE
THIS EQUIPMENT TO RAIN OR MOISTURE
DO NOT OPEN
RISK OF ELECTRIC SHOCK
The lightning flash with arrowhead symbol within an
equilateral triangle is intended to alert the user of the
presence of uninsulated “dangerous voltage” within
the product’s enclosure that may be of sufficient
magnitude to constitute a risk of electric shock to
persons. The exclamation point within an equilateral
triangle is intended to alert the user of the presence of
important operating and maintenance (servicing)
instructions in the literature accompanying the product
(i.e. this manual).
Caution To prevent electric shock, do not use the
polarized plug supplied with the unit with
any extension cord, receptacle, or other
outlet unless the blades can be fully
inserted.
Important Safety Instructions
Please read and keep these instructions. Heed
and follow all warnings and instructions.
Install in accordance with the manufacturer’s
instructions.
Grounding The chassis of this product is
grounded through the grounding conductor of the
PS-3/PS-3E power cord. To avoid electric shock,
plug the power cord into a properly wired
receptacle before making any connections to the
product. A protective ground connection, by way
of the grounding conductor in the power cord, is
essential for safe operation. Do not defeat the
safety purpose of the grounding plug. The
grounding plug has two blades and a third
grounding prong. The third prong is provided for
your safety. When the provided plug does not fit
your outlet, consult an electrician for replacement
of the obsolete outlet.
Danger from Loss of Ground If the protective
ground connection is lost, all accessible conduc-
tive parts, including knobs and controls that may
appear to be insulated, can render an electric
shock.
Proper Power Cord Use only the power cord
and connector specified for the product and your
operating locale. Use only a cord that is in good
condition. Protect the power cord from being
walked on or pinched, particularly at plugs,
convenience receptacles, and the point where
they exit from the apparatus.
Operating Location Do not operate this
equipment under any of the following condi-
tions: explosive atmospheres, in wet locations,
in inclement weather, improper or unknown AC
mains voltage, or if improperly fused. Do not
install near any heat source such as radiators, heat
registers, stoves, or other apparatus (including
amplifiers) that produce heat. Unplug this
apparatus during lightning storms or when
unused for long periods of time.
Stay Out of the Box To avoid personal injury
(or worse), do not remove the product covers or
panels. Do not operate the product without the
covers and panels properly installed. Only use
accessories specified by the manufacturer. Clean
only with a damp cloth.
User-serviceable parts There are no user
serviceable parts inside the 9022. In case of
failure, refer all servicing to the factory. Servic-
ing is required when the 9022 has been damaged
in any way, such as when a power supply cord or
plug is damaged, liquid has been spilled or
objects have fallen into the apparatus, the
apparatus has been exposed to rain or moisture,
does not operate normally, or has been dropped.

9022
3
Chapter 3 Hardware Installation
Installing the 9022 is straightforward.
1. Provide sufficient rackspace. Avoid situating the 9022 next to wireless microphone
receivers (just in case). No extra rackspace is required between adjacent 9022’s.
2. Use the appropriate Symetrix PS-3 AC power transformer for your locale’s mains voltage.
Accept no substitutes. “Similar-looking” is not close enough to guarantee compatibility.
3. Make the audio input and output connections as required.
4. The balanced input stage uses a simple diffamp circuit. For unbalanced operation, ground the
low side of the input, preferably at the source.
5. The balanced output stage emulates a grounded-center tap transformer. For unbalanced
operation, float the unused output.
6. If you are using multiple units with one control path, daisy chain the rear-panel Host and
Slave port connectors to each other. Do not loop the last device back to the first one. All
signal lines within the connector are passed through the 9022 for compatibility with other
non-Symetrix units. The Host and Slave port connectors are male to female connectors, like
numbered pins wired together. For a 9022-only system, only pins 2, 3, 4, and 5 are needed. If
there are other non-Symetrix devices in the chain of devices, then you may need to wire the
remaining pins together. The 9022 passes connections through on all other pins (i.e. they’re
wired together).
7. Connect the first 9022’s Host port connector to the computer used for device control. You
can also use the front-panel connector.
8. Set each 9022’s device address switch to something unique. We suggest starting at 1 and
incrementing the address by 1 for each additional device. The switches require a binary
number that represents the device address (convert the decimal device address to binary) in
binary notation. (See Appendix A).
9. Connect the Remote Program Select terminals as required. A momentary ground connection
is required. This could be an SPST switch, a transistor pulldown, etc. These connections are
not required for operation. If not used, leave them (or unused terminals) unconnected.

4
9022
Front & Rear Panel Controls Chapter 4
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CH1 CH2
CLIP
BYPASS
SIGNAL
CLIP
BYPASS
SIGNAL
INPUT
COMMPOWER
RS-232 CONTROLSYSTEM STATUS
21
65
34
87
TM
AUDIO WORKPLACE
9022
2X2 DSP ENGINE
PRESET
TM
CH1 INPUT
LYNNWOOD, WA, USA
MANUFACTURED IN
THIS UNIT CONTAINS NO
2X2 DSP ENGINE
9022
USER SERVICEABLE PARTS
AUDIO WORKPLACE
CH1 INCH2 IN
CH2 INPUT
CH1 OUT
CH2 OUTPUT
CH2 OUT
CH1 OUTPUT
78
REMOTE PROGRAM SELECT
876
561234
54312
HOST PORT
UPSTREAM
SLAVE PORT
DOWNSTREAM
DEVICE
TM
PS3E POWER
SUPPLY ONLY.
CONNECT TO
SYMETRIX PS3 OR
RÉFÉREZ TOUTE RÉPARATION ÀUN TECHNICIEN QUALIFIÉ.
AUDIO WORKPLACE
9022
FABRIQUÉAUX E.-U. PAR SYMETRIX INC., LYNNWOOD, WASHINGTON.
ADDRESS

9022
5
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(Table continued on next page.)

6
9022
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9022
7
Host Port Connections
The Host (upstream) port uses a DB-9 female connector with the following connections:
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9niIRhguorhtssap

8
9022
The Symetrix AudioWorkplace software provides real-time control over multiple audio functions
from a Windows 95/98 PC environment.
Use one of the following procedures to install the Audio Workplace software on your computer.
From the Audio Workplace CD-ROM:
1. The software should autorun after inserting the CD-ROM into your computer’s CD-ROM
drive.
2. If the software does not autorun, then Click on the Start button, Run d:\setup
(if your CD-ROM drive isn’t d:, then substitute its drive letter)
From floppy discs:
1. Insert disk number 1 into your computer’s floppy disk drive.
2. Click on the Start button, then Run a:\setup
(if your floppy drive isn’t a:, then substitute its drive letter)
From the Symetrix Website (http://www.symetrixaudio.com):
1. Download the Audio Workplace program file.
2. From the Start button, Run the file/program that you just downloaded to start the Setup
program.
If there is no 9022 connected to your computer, the software reverts to offline mode. Here you can
explore the software, experiment to your heart’s content, and perhaps even get useful work done.
You can save any configurations that you create to a file that can be downloaded later into an
operating 9022.
OFFLINE MODE
1. Use the control panel to determine the name of your computer’s serial port (COM1, COM2,
COM3, COM4).
2. Double click on “s9022.exe”to run it.
3. When the program fails to detect a 9022 on its serial port, it opens a dialog box and asks if
you want to work offline. Click on the Yes button.
ONLINE MODE
1. Use the control panel to determine the name of your computer’s serial port (COM1, COM2,
COM3, COM4).
2. Double click on “s9022.exe”to run it.
3. From the Setup menu, select your computer’s serial port.
4. Click on the ONLINE button.
5. Choose an option from the buttons displayed:
a. Create New Location File
b. Upload from Devices
c. Download to Devices
d. Cancel
6. Get to work.
Audio Workplace Installation Chapter 5

9022
9
The button options are:
Create New Location File Start New Location file. When you are done, be sure to save
it. Since you’re working online, your work is communicated
to the 9022 as you work.
Upload from Devices Upload the location file information FROM the currently
connected 9022(s).
Download to Devices Download the current location file to the 9022(s). Use this
option if you’ve been working offline and want to hear the
results of your work.
Cancel Didn’t want to do this. Get me out of here.
FINDING YOUR SERIAL (COM) PORT
The 9022 requires a serial port on the host computer for communications.
1. Click Start, Settings, Control Panel.
2. From the Control Panel screen, locate the System icon and left-doubleclick it.
3. Select the Device Manager tab.
4. Locate the Ports icon and left-doubleclick it.
5. The device manager now displays the ports used by the computer and their assignments.
Clicking on any of them displays additional information. If you have a modem, you may need
to go back to step 4, locate the Modems icon, and doubleclick it to see its COM port
assignment. Sometimes your mouse may also use a serial port.
Remember the port number of an unassigned serial port for use with the 9022.

10
9022
Using Audio Workplace
SYMETRIX AUDIO WORKPLACE SOFTWARE
The Symetrix Audio Workplace is a Windows 95/98 application designed to configure and control
the 9022. Most of the software is self-explanatory, especially if you have any experience with
other Windows applications.
Device Configuration Screen
This screen allows you to configure the signal path within the 9022.
·Click and drag any processor to the single-line diagram.
·Click and drag any connecting line to alter the signal path.
·Remember that there are only two inputs and two outputs.
·The Device Configuration Screen will refuse to allow any connection that is ‘illegal.’
·Only one split (two inputs paralleled) is allowed.
·Think about the order of processing as you would if you were connecting physical
processors together.
Try it. It’s much easier to do than it is to describe.
Chapter 6
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(Table continued on next page.)

9022
11
C ONFIGURATION
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.seludomlanretniehtfo
M INI D EVICE
C ONFIGURATION
D IAGRAM
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TIDEehtnognikcilC.neercss’kcolb
noitarugifnoCehtotuoysnruternottub
.rotidE
,deyalpsidsyawlasikcolbsihT
kcolbrossecorpehtfosseldrager
.detidegnieb

12
9022
Graphic Equalizer Screen
The equalizer block can be either a 31-band graphic equalizer or a 10-band parametric equalizer.
The high- and low-pass filters are also integral to these processing blocks. The two different
equalizer types are mutually exclusive: you can’t use the graphic EQ and then switch to the
parametric EQ to notch something as well. You can cascade the two equalizer blocks and set one
as a graphic and the other as a parametric.
The frequency response graph shows the cumulative effects of the equalizer and the high- and low-
pass filters.
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O NLINE
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.2209aotnoitcennoc
B
YPASS .rezilauqeehtsessapyB.
F
LAT
ycneuqerftalfotslortnocserotseR
.gnittesesnopser
N ARROW B W
othtdiwdnabretlifsteS
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W IDE B W
othtdiwdnabretlifsteS
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G RAPHIC /
P ARAMETRIC
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H IGHPASS F ILTER
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L OWPASS F ILTER
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ssapwoleht,neercsnoitarugifnoC
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E QUALIZER S LIDERS
afonoitaunettarotsoobsteS
.dnabralucitrap
egnahcotredilsagarddnakcilC
.gnittessti
puehtesuneht,redilsanokcilC
stiegnahcotsyekworranwoddna
.gnittes
ehtnitodanokcilc-tfelnacuoY
garddnaneercsehtfoaerahparg
.lortnocralucitrapatesottodtaht
hpargehtnikcilc-thgirnacuoY
ehtgnisuevruca’ward‘dnaaera
.esuom

9022
13
Parametric Equalizer Screen
The equalizer block can be either a 31-band graphic equalizer or a 10-band parametric equalizer.
The high- and low-pass filters are also integral to these processing blocks. The two different
equalizer types are mutually exclusive: you can’t use the graphic EQ and then switch to the
parametric EQ to notch something as well. You can cascade the two equalizer blocks in the device
configuration screen and set one as a graphic and the other as a parametric.
The frequency response graph shows the cumulative effects of the equalizer and the high- and low-
pass filters.
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O NLINE
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F.dnabsihtfoycneuqerfretnecehtsteS
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W .dnabsihtfohtdiwdnabehtsteS
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N .dnabsihtfoniagehtsteS.bonktuc/tsoobehtsisihT
G
RAPHIC /
P
ARAMETRIC
rorezilauqecihpargstceleS
.rezilauqecirtemarap
H
IGHPASS F ILTER
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OWPASS F ILTER
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ssapwoleht,neercsnoitarugifnoC
,epolsevatco/Bd42ro21asahretlif
-zH02foegnarycneuqerfadna
.zhk02

14
9022
Delay Screen
The delay implements a single-input, single-output digital delay. You can enter the delay time in
seconds, feet, or meters.
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ETERS ( INPUT
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S
ECONDS .sdnocesniemityaledehtniepyT
E
NVIRONMENT
W INDOW
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swollawodniwsiht,erutarepmetno
.seulavnworuoyylppusotuoy
evahtonseod2209eht,oN
.nihtiwsrosneserutarepmet

9022
15
Compressor/Limiter Screen
The compressor/limiter implements a single- or dual-band gain reduction processor.
If the Master button has been pressed in the Device Configuration Screen block diagram, the
sidechains (gain reduction signal) of the two compressors operate using a signal representing the
sum of the two inputs.
If you want both compressors (A and B) to have the same settings, yet be independently settable,
start with the Master button pressed on the Device Configuration Screen. Make your initial settings
on the Master device, then return to the Device Configuration Screen and unclick the Master button
for the compressors.
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.detcennoc2209asierehtfi
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evitcanatuohtiwnoitarugifnoc
.2209aotnoitcennoc
C
OMP/ L IM B YPASS .kcolbrosserpmocehtsessapyB
B
AND S PLIT
F REQUENCY S LIDER
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ehtfosdnabowteht
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F
ULL R ANGE
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.edomsiht
S
PLIT B AND
,edomsihtnI.edomdnab-tilpsstceleS
ssapwoldnassaphgih(revossorca
sevird)delellarapstupnihtiwsretlif
retimil/rosserpmocetarapes
nehterastuptuoesohw,srossecorp
.langiselgnisaotnikcabdexim
yrevebnacedomdnab-tilpS
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.stcafitranoisserpmoc
G
AIN S LIDER .niagpuekamtuptuostsujdA
G
RAPH A REA
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.sgnittesoitardna
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tesothpargtuptuo/tupniehtnitod
gardnacuoynehT.dlohserhteht
ehtfodne-thgirehttatodneergeht
.oitarehttesotenilhparg
K
NEE B UTTONS
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.drah,muidem
ehtfoepahsehtsebircsedeenkehT
langisehtsaevrucnoisserpmoc
dlohserhtehthguorhtstisnartlevel
.level
(Table continued on next page.)

16
9022
A TTACK T IME
S LIDER
ehtfoemitkcattaehtsteS
.rosserpmoc
-hgihniatersemitkcattaregnoL
.tnetnoctneisnartycneuqerf
R
ELEASE T IME
S LIDER
ehtfoemitesaelerehtsteS
.rosserpmoc
eziminimsemitesaelerrewolS
.gnipmup
T
HRESHOLD S LIDER
ehtfoleveldlohserhtehtsteS
.rosserpmoc
R
ATIO S LIDER .oitarnoisserpmocehtsteS
era1:01nahtsselsoitar,yllareneG
elihw,noisserpmocderedisnoc
deredisnocera1:01evobaesoht
.gnitimil

9022
17
Specifications
Analog to Digital Conversion
Dynamic Range >114 dBFS, A-weighted
THD+Noise < .002% THD @ -1dBFS, 1KHz,
input attenuators set to unity gain
Input Impedance >20k balanced
Maximum Input Level +25dBu balanced
Minimum Recommended Nominal Input Level -10dBu balanced,
MinimumCMR 40dB at 60Hz
Digital to Analog Conversion
Dynamic Range >112 dBFS, A-weighted
THD+Noise <.003% at -1 dBFS, 1kHz,
output attenuators set to unity gain
Output Impedance 300 Ohms balanced
Performance Data
Frequency Response 20 Hz to 20 kHz, ±0.5 dB
Sample Rate 48 kHz
Converter Types Delta-Sigma
Conversion Method 24-bit
Filter Algorithms Power normalized lattice structure
Pink Noise Periodicity >6 minute cycle period
Number of Stored Programs 8
Maximum Number of Units on a Single Daisy Chain 125
Serial BaudRate 19.2k or 38.4k, 8-bit, no parity
Physical
Size (hwd) 1.75 x 19 x 6 inches, 4.44 x 48.26 x 15.24 centimeters
Weight 4.4 lbs (1.99 kg) net
Electrical
Power requirements 115V AC nominal, 105 to 125V AC
50 to 60Hz, 20 watts
230V AC nominal, 205 to 253V AC
50 to 60Hz, 20 watts
Specifications subject to change without notice.
The digital signal processor (Processor) shall have two inputs and two outputs. There shall be no
user-accessible (front panel) controls. The Processor shall perform all signal processing functions
in the digital domain utilizing 24-bit digital wordlengths. Analog-to-digital and digital-to-analog
conversion shall use 24-bit delta-sigma converters.
The Processor shall provide the following signal processing functions: high-pass filters, low-pass
filters, equalization (either graphic or parametric), signal delay, and single- and dual-band com-
pression/limiting. The Processor shall also provide pink noise for testing and sound masking
purposes.
All signal processing functions shall be controllable by a suitable graphical interface computer
program. The computer control program shall allow each channel of the Processor to be configured
to use the aforementioned signal processing functions via a drag-and-drop user interface. Each
channel shall have eight locations for signal processing blocks. It shall be possible to interconnect
the two channels of the Processor so that one input drives both outputs.
Communication with the Processor shall take place via RS-232 serial protocol. The Processor shall
be capable of storing 8 preset configurations in its own memory and recalling via a contact closure
arrangement. The system status shall be indicated on the front panel. The system programming port
shall be accessible from the front panel. Up to 125 multiple Processors shall be capable of being
chain-connected together while maintaining their addressability.
All audio connections shall be balanced and accessible via XLR connectors and bare wires. RS-
232 connections shall utilize DB-9 female connectors. There shall be no batteries within the
Processor.
The digital signal processor shall be the Symetrix 9022 2x2 DSP Engine.
ARCHITECTS AND ENGINEERS SPECIFICATIONS
SPECIFICATIONS
Chapter 7

18
9022
Block Diagram Chapter 8
CH1 OUTPUT
S
AMP AMP
BYPASS SOURCE
GAIN
(24-BIT)
CONVERTER
D/A DIGITALLY
CONTROLLED
SELECTOR JUMPERS
CH2 OUTPUTS
CLIP
CH2
SIGNAL COMM BYPASS
FLASH
ROM
CH1
CLIP
BYPASS
POWER
SIGNAL
2
PRESET
4 8 6
LED DRIVER AND DISPLAYS
1
3
7
5
POWER
CIRCUITRY
SYSTEM STATUS
DEVICE
8765341 2
PROCESSOR
DIGITAL SIGNAL
A/D
GAIN CONTROLLED DIGITALLY
(24-BIT)
CONVERTER
ADDRESS
CH1
I
NPUTS
HOST
PROCESSOR
INPUT
PORT
HOST
RS-232 CONTROL
PORT
SLAVE
REMOTE PROGRAM SELECT
INPUTS
CH2
MONITORING
CLOCK
MASTER
HIGH
SPEED
RAM