Consumer Microcircuits EV9000 User manual

EV9000
Evaluation Kit
User Manual
2001 Consumer Microcircuits Limited
UM9000/2 May 2001
Advance Information
CMX909B, CMX969, FX919B,
FX929B
Modem Evaluation Kit

Evaluation Kit User Manual EV9000
2001 Consumer Microcircuits Limited 2 UM9000/2
USER MANUAL CONTENTS
Section Page
1.0 GENERAL INFORMATION...............................................................................................................4
1.1 Introduction ...............................................................................................................................4
1.2 Warranty.....................................................................................................................................4
1.3 Features .....................................................................................................................................4
1.4 CMX909B, CMX969, FX919B, FX929B Modem Features .......................................................5
1.5 Handling Precautions ...............................................................................................................5
1.5.1 Unpacking..........................................................................................................................5
1.5.2 Static Protection.................................................................................................................5
1.5.3 Cleanliness ........................................................................................................................5
1.6 Compatibility..............................................................................................................................6
1.7 Specifications............................................................................................................................7
1.8 Prerequisites and Required Equipment..................................................................................8
1.8.1 Prerequisites......................................................................................................................8
1.8.2 Power Supply.....................................................................................................................8
1.8.3 Personal Computer............................................................................................................8
1.8.4 Parallel Port Cable.............................................................................................................9
1.9 Limitations.................................................................................................................................9
1.9.1 Software.............................................................................................................................9
1.9.2 Hardware...........................................................................................................................9
2.0 QUICK START ................................................................................................................................10
2.1 Introduction .............................................................................................................................10
2.2 First...........................................................................................................................................10
2.3 Second - Setup........................................................................................................................10
2.4 Third - Select and Execute .....................................................................................................13
2.5 Fourth - Explore ......................................................................................................................13
3.0 HARDWARE....................................................................................................................................14
3.1 Introduction .............................................................................................................................14
3.2 Description...............................................................................................................................14
3.2.1 Functional Layout.............................................................................................................14
3.2.2 Personality Plug-In Boards ..............................................................................................14
3.2.3 Connectors ......................................................................................................................15
3.2.4 Signal Flow ......................................................................................................................15
3.2.5 Jumpers...........................................................................................................................18
3.2.6 Test Points.......................................................................................................................21
3.2.7 Parallel Port Interface......................................................................................................22
3.2.8 HALT Switch....................................................................................................................22
3.2.9 Exposed Modem Interface - 50 Pin Header ....................................................................22
3.3 Setup ........................................................................................................................................23
3.3.1 Unpowered ......................................................................................................................23
3.3.2 Powered...........................................................................................................................23
4.0 SOFTWARE ....................................................................................................................................27
4.1 Introduction .............................................................................................................................27
4.2 Installation ...............................................................................................................................27
4.3 Functions.................................................................................................................................27
4.4 Operation Flow........................................................................................................................28
4.5 Screen Layout and Operation................................................................................................28

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4.5.1 Select Printer Port and Address ......................................................................................28
4.5.2 Select Modem Chip Type and Driver Revision................................................................28
4.5.3 Main Window...................................................................................................................29
4.6 Tests.........................................................................................................................................32
4.6.1 Test 1: PC Interface Test.................................................................................................32
4.6.2 Test 2: Issue Configured A & B Tasks.............................................................................33
4.6.3 Test 3: Tx continuous random data from A using TSB or TQB (T4S, T8B, T40B or T24S)35
4.6.4 Test 4: Tx continuous preamble from B ..........................................................................35
4.6.5 Test 5: BER & DQ test 'B' to 'A' using unformatted data.................................................38
4.6.6 Test 6: BER & DQ test ‘B’ to ‘A’ using formatted messages ...........................................39
4.6.7 Test 7: Tx user defined packet from B to A driving PTT & starting acquire on CS .........42
4.6.8 Test 8: Supplementary Tests...........................................................................................45
5.0 TROUBLESHOOTING....................................................................................................................46
5.1 Common Questions/Situations..............................................................................................46
5.2 Suggestions.............................................................................................................................47
5.3 Diagrams..................................................................................................................................47
APPENDIX A - ADDITIONAL TESTS FOR CMX909B ..................................................................51
APPENDIX B - ADDITIONAL TESTS FOR CMX969.....................................................................51
APPENDIX C - ADDITIONAL TESTS FOR FX919B AND FX929B...............................................54

Evaluation Kit User Manual EV9000
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1.0 General Information
1.1 Introduction
This manual provides general information to support the installation and operation of the EV9000
Modem Evaluation Kit, a complete test platform to demonstrate and test the CMX909B, CMX969,
FX919B, and FX929B components.
All trademarks and service marks are held by their respective owners.
1.2 Warranty
The EV9000 hardware and software have been developed and are being provided to help
designers develop designs based on the CMX909B, CMX969 FX919B, and FX929B modem data
pump ICs. Every reasonable effort has been made to provide high quality and performance in
pursuit of that goal.
Toward that end, CML is happy to answer questions and provide general assistance concerning
the EV9000’s use. Our greatest desire is to help the user to succeed. Section 5.4 contains
details of how to contact CML.
Since experiments and designs are the responsibility of the EV9000 user, CML’s liability regarding
the use of the EV9000 is in all cases limited to the EV9000 purchase price.
No other warranty is expressed or implied.
1.3 EV9000 Features
The EV9000 Modem Evaluation Kit includes many useful features including those highlighted in
Table 1.
• Two complete modem channels easily
configured to the user’s selection of CMX909B,
CMX969, FX919B, or FX929B components
• Windows based PC software provides
virtual pushbutton control of all modem
parameters
• Exposed hardware interface supports the
connection of modem circuits to end-system
designs
• Software selection of on-board signal biasing
and off-board noise signals for convenient
and repeatable multivariable testing
• Display the state of each modem’s internal
registers • Parallel port connection to a PC
• Software controlled test sequences with
result logs • User selectable baud rates and choice of
two crystal clock rates
• Prebuilt plug-in personality boards for
narrow bandwidth 8kb/s GMSK, wider
bandwidth 38.4kb/s GMSK, MDC4800
(4800bps) and 19.2kb/s 4 Level FSK operation
• Blank plug-in personality boards for user
customised configurations
Table 1: EV9000 Features

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1.4 CMX909B, CMX969, FX919B, FX929B Modem Features
The CMX909B, CMX969, FX919B, and FX929B components include Gaussian filtered minimum
shift keying (GMSK) and four level frequency shift keying (4 Level FSK) modems. They execute a
rich set of communication protocol tasks to maximize performance and minimize end product
power consumption and cost. Well suited to portable wireless applications, these modems
include the following automated functions:
• Bit or symbol synchronisation
• Frame synchronisation
• Forward error correction (FEC)
• Data interleaving for FEC enhancement
• Cyclic redundancy checking (CRC)
• Block transmit and receive tasks:
Header, Intermediate, and Last block formats
• Support for protocols such as MDC4800, Mobitex™ and RD-LAP™.
1.5 Handling Precautions
Like most evaluation boards, the EV9000 is designed for use in office and laboratory
environments. The following practices will help ensure its proper operation.
1.5.1 Unpacking
Ensure that all of the items mentioned in the separate Information Sheet (EK9000) are present in
the correct quantities. Notify CML (via your distributor) within 7 working days if the delivery is
incomplete.
1.5.2 Static Protection
The EV9000 uses low power CMOS circuits which can be partially or completely damaged by
electrostatic discharge. Partially damaged circuits can erroneously function and provide
misleading test results which can be time consuming (and extremely frustrating) to resolve.
Before handling the EV9000, discharge your body by touching a grounded connection or by using
a wrist strap. Work surfaces and tools (e.g. a soldering iron) should also be grounded before they
contact the EV9000.
1.5.3 Cleanliness
Because some EV9000 circuits are very high impedance, it is important to maintain their
cleanliness. All flux and other contaminants should be thoroughly removed after making any
modifications.

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1.6 Compatibility
Compatibility between different versions of EV9000 hardware and software, and the “9x9” series
devices is as shown in Table 2.
Rx
Filter Tx Filter DOC1 DOC2
Device Personality
Card Type C1 C2 C3 C4
Data
Rate Software Revision
CMX909B A or 909-8 - 470pF 15nF 15nF 8kb/s ES9090xx.EXE N/A
FX919B
or
FX929B
B or 919/29
82pF 82pF 4.7nF 4.7nF 9.6ks/s
ES9000xx.EXE
2
CMX969 969 100pF 100pF - - 9.6ks/s or
4.8kb/s
ES9690xx.EXE
N/A
CMX909B 909-38 - 82pF 3.3nF 3.3nF 38.4kb/s
ES9090xx.EXE N/A
FX909A A or 909-8 - 470pF 15nF 15nF 8kb/s ES9000xx.EXE 1
Table 2: Compatibility
Notes:
1. Customers using the revision 002 motherboard (PCB) should note that jumpers E13 to E18
inclusive, which are mentioned in the EV9000 User Manual, only exist on the revision 003 PCB.
Customers should retain their copy of the DB900 User Manual for the description of the revision
002 PCB, but should use the EV9000 User Manual for a description of the latest software.
2. Customers evaluating FX909A may use the FX919B/929B software (ES9000xx.EXE) with the
“FX909A” chip selected. Customers should also remember to set the chip type and driver revision
select button (Figure 4) to the "Rev 1" position when evaluating the FX909A.
3. Customers wishing to evaluate FX919A or FX929A devices may use either revision 002 or 003
motherboard (PCB), but should continue to use the DB900 User Manual and "DB" software
(variously described as DB900.EXE v1.11 or CML Rev 4), available separately from CML.
Releases of EV9000 executable software marked Rev 4.1 or later should not be used as they
exercise features only available on the FX919B and FX929B devices.
4. FX909, FX919 and FX929 devices are not supported with the EV9000 Evaluation Kit.
5. Older personality boards had identification tags marked "A", "B", etc. The latest personality boards
have a mark placed against the device type with which they are to be used (eg. "909-38" for a
CMX909B operating at 38.4kb/s, etc). The layout of the latest blank personality board is shown in
Figure 2: when configured for a particular device, surface mount capacitors are soldered to the
appropriate locations and the board is marked, as described above.

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1.7 Specifications
The EV9000 supports the following devices: CMX909B, CMX969, FX919B, and FX929B. All
voltages are referenced to GND. Connections provided on the EV9000 hardware have the
characteristics shown in Tables 3 and 4.
EV9000 Characteristic Min Typical Max Units
+5V (=Vs) power
voltage 4.5 5.0 5.5 V
current 50 mA
-5V (=-Vs) power
voltage -5.5 -5.0 0 V
current 20 mA
+5VM (=Vm) modem power
voltage 3.0 5.0 5.5 V
current 30 mA
AGND power 0 0 0 V
RXINA I/P
voltage -Vs Vs V
impedance 22 222 kΩ
TXOUTA O/P 1 Vp-p
NSA1 I/P
voltage -Vs Vs V
impedance 22 222 kΩ
NSA2 I/P
voltage -Vs Vs V
impedance 22 222 kΩ
RXINB I/P
voltage -Vs Vs V
impedance 22 222 kΩ
TXOUTB O/P 1 Vp-p
NSB I/P
voltage -Vs Vs V
impedance 22 222 kΩ
PTT (open collector) O/P
collector voltage 0 20 V
collector current (PTT < 0.5V) 25 mA
CS I/P 0 Vm V

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EV9000 Characteristic Min Typical Max Units
Temperature
operating 20 25 30 °C
storage -40 80 °C
Relative Humidity (non-condensing) 0 95 %
PC Interface Centronics compatible
Table 3: Wire Connector Interface Specifications
Vm = “+5VM”, Vs = “+5V”, and -Vs = “-5V” as per Table 6.
Characteristic Min Typical Max Units
input voltage
AO0-AO5 0 Vm V
CO0-CO7 0 Vm V
DO4, DO5 0 Vm V
BO2, BO3, BO4 0 Vs V
output load
CO0-CO7 consult modem data sheet
Table 4: P1/P2 Header Interface Specifications
Vm = “+5VM”, Vs = “+5V”, and -Vs = “-5V” as per Table 6.
1.8 Prerequisites and Required Equipment
1.8.1 Prerequisites
In order to effectively use the EV9000 Modem Evaluation Kit software, the user must have a
working knowledge of Microsoft Windows™ and be familiar with the operation of typical Windows
compatible applications.
1.8.2 Power Supply
A user provided power supply is required for +5V and -5V power. An additional supply may be
required for modem IC operation at other supply voltages.
1.8.3 Personal Computer
An IBM compatible PC is required which meets the following description:
Item Specifications/Performance
CPU 20MHz 386 or better. Lower performance PCs may
operate successfully at lower modem data rates.
Operating System Windows 3.x, Windows '95 or Windows '98
Parallel Port LPT1, LPT2 or LPT3
Table 5: Personal Computer Requirements

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1.8.4 Parallel Port Cable
A 25 conductor parallel port cable is supplied having male DB25 connectors at both ends.
1.9 Limitations
1.9.1 Software
The EV9000 software uses Microsoft Windows to ease setup and operation while providing
flexibility and power. However, the high sustained throughput required of the parallel port
connection to the EV9000 Evaluation Kit cannot be supported by Windows. As a result, the
EV9000 software bypasses some DOS and Windows conventions. Please note that concurrent
tasks will be suspended during execution of the EV9000 sofware. Network software may have to
be restarted after using this evaluation kit. The EV9000 software will also stop the PC’s clock, so
timestamps when saving files may not be accurate.
The EV9000 software will occupy all the PC’s resources during various tests. This prevents
keyboard activity from being recognized during test execution. Any tests which wait until a
modem produces a specific logic output signal (e.g. BFREE becomes logic 1) will execute
indefinitely if the test setup is inappropriate. The program may appear to be stuck in such a case.
The EV9000 HALT switch must be pressed to terminate the test. Please note that traditional
Windows commands such as Alt-Tab and Alt-Ctl-Del may not work when the software is busy.
Trying to use the software without an evaluation kit connected to the PC parallel port may cause
the software to hang if a test is executed. If this happens, pressing the Alt-Ctl-Del keys on the PC
keyboard may enable you to quit from the application. Otherwise, a hard reset of the PC will have
to be performed.
Please note that the EV9000 software is NOT suitable for use under Linux, OS2, Windows '2000
or Windows NT operating systems.
In addition, some atypical PC’s may have software and/or hardware incompatibilities with the
EV9000 Modem Evaluation Kit.
1.9.2 Hardware
1.9.2.1 Initialising
There is no hardware reset switch or function in the EV9000 hardware design. The HALT switch
(SW1) produces a signal used by the EV9000 software to indicate that a test should be
terminated. In order to be sure of the state of the hardware, the EV9000 software must be started
after the EV9000 is powered and the parallel port connection has been made between the PC and
EV9000. Failure to follow this procedure could produce spurious commands which affect the
hardware state. Upon being started, the EV9000 software will initialise all of the EV9000
hardware.
1.9.2.2 Parallel Port Compatibility
The EV9000 parallel interface design is compatible with most PC parallel ports. However, the
integral pull-up resistors provided with certain PC parallel ports are too high in value to support the
required digital signal speeds. Accordingly, the EV9000 parallel port interface circuit includes
supplementary 560Ωpull-up (to +5V) resistors on pins 1, 14, 16, and 17 of the DB25 parallel port
connector. These may not be needed when interfacing to certain types of PC and may be
disconnected by removing jumpers E13, E14, E15 and E16 if the PC has insufficient drive
capability on its parallel port. One should also use a parallel port cable less than, or equal to, 1.5
metre long because the capacitance of longer cables limits signaling speed. Nonetheless, in
some cases a PC’s parallel port may still not operate quickly enough.

Evaluation Kit User Manual EV9000
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2.0 Quick Start
2.1 Introduction
This section provides instructions for users who wish to rapidly start experimenting with the
EV9000 using 8kb/s GMSK modulation with the CMX909B - and without reading all of the detailed
instructions. Brief instructions for reconfiguring the EV9000 to evaluate FX919B, FX929B or
CMX969 products are also included. The “quick start” setup connects the two modem channels
so that each channel’s Tx output is connected to the other channel’s Rx input. These instructions
assume that the EV9000’s factory adjustments have not been altered. If they have, the EV9000
jumper positions and Rx / Tx signal gain and bias controls must be adjusted for the “quick start”
procedure to be successful. If the EV9000’s jumpers or gain and bias controls have been altered,
refer to Section 3.3.
2.2 First...
Review Sections 1.5 to 1.9 above. Don’t worry, those sections are very short and will help you to
avoid damaging the EV9000 or your equipment.
2.3 Second - Setup
1. Select which type of modem to test. The EV9000 comes with CMX909B modems installed
along with their appropriate personality plug-in boards. If you want to use a different modem,
carefully remove the installed modems with an IC extraction tool and install a matching pair
of modems. (If you do not have an extraction tool, a small flat bladed screwdriver can be
very carefully inserted between the IC and its socket at each end. Do this a little bit at a time,
twisting the screwdriver blade and alternating between each end of the IC until it lifts free of
its socket. Take care not to lever against other components or the PC board as they may be
damaged.) Make sure you properly orient the ICs to ensure pin 1 is in the proper socket
location, as shown in Figure 1.
Top View
mark indicates
pin 1 end of IC
and its socket
Pin 1
Figure 1: IC Pin 1 Identification
2. Connect the appropriate crystal into the circuit according to the following directions:
• IF CMX909B modems are installed, change jumpers E5, E6, E10 and E11 to position A.
• IF CMX969, FX919B or FX929B modems are installed, change jumpers E5, E6, E10 and
E11 to position B. (For more information, see Table 12 and Figure 10).
3. Select and carefully install the appropriate pair of personality plug-ins to match the selected
modem according to Table 2. The layout of a blank personality board is shown in Figure 2.

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Figure 2: Blank Plug-In Personality Board
4. Make the following supply connections with power off to the EV9000 motherboard:
• 5V power to +5V and +5VM connector
• supply ground to GND connector
• signal ground to AGND connector (any of the several AGND connectors is ok)
• -5V power to -5V connector
Check that these connections are correct, as connecting up the wrong supplies could destroy
circuits on the motherboard.
5. Make the following signal connections on the EV9000 motherboard:
• TXOUTA to RXINB
• TXOUTB to RXINA
6. Connect your PC’s parallel port to the EV9000 motherboard DB25 connector.
7. Copy the appropriate applications software from the Evaluation Kit CD-ROM to a hard disk on
the PC.
• For CMX909B evaluation, use the file ES9090xx.EXE
• For CMX969 evaluation, use the file ES9690xx.EXE
• For FX919/929B evaluation, use the file ES9000xx.EXE
(where xx is the version number).
8. Turn on power to the EV9000.
9. On the PC, start Windows and run the appropriate applications software by double-clicking
on its name as seen in a File Manager window. (You can also create a program icon in the
Program Manager for more convenient program launching.)
10. Select the desired PC parallel port and its base address from the pull-down list shown in
Figure 3. Base addresses automatically default to typical values so changes to them are
usually not required.

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Figure 3: Parallel Port Configuration
11. Referring to Table 2, select the chip type (where available) and driver revision (where
available) using the buttons and pull-down list shown in Figure 4. (Note that the "Rev 1"
position should be used for FX909A and the "Rev 2" position (default) should be used for
FX919B and FX929B, if using the ES9000xx.EXE software).
Before Selecting
Chip Type After Selecting Chip Type
Figure 4: Chip Type and Driver Revision Select (ES9000xx.EXE software only)
The EV9000 motherboard’s two modem channels are now wired to ‘talk’ to each other and
the software is ready to execute modem operations.
12. Using the pull-down list near the bottom of the window, select Test 1: "PC Interface Test" to
initiate a test of the connection between the PC and the EV9000. This test continuously
reads IRQN A, IRQN B, Carrier Detect, and the HALT switch and logs any state changes to
the scrolling log area. Slowly press and release the EV9000 HALT switch and observe the
changes reported in the log. When you have verified the operation of the PC interface by
confirming the logging of HALT switch activity, click the Stop button to stop the test.
If HALT switch pressing and releasing actions are not logged on the PC, the PC to EV9000
connection is not operating properly. If this is the case, recheck your setup and review
Section 1.9. This test must be successful in order to operate the EV9000.
13. Click on the Default button to set default values for both channels’ Command, Control, and
Mode registers. The default Xtal frequency value is also entered. (The Xtal frequency value
which is displayed in the EV9000 software is simply a calculation aid for on screen display of
the configured data rate. The displayed data rate is calculated from the entered Xtal
frequency and the channel’s selected CKDIV value in the Control Register area. Changing
this value does not actually change EV9000 operation in any way. The modem Xtal
frequency is set by the user’s jumper selection of installed crystals.)
The EV9000 is now ready to execute a test.

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2.4 Third - Select and Execute a Test
1. Use the Test Selection list box to select Test 7: "Tx user defined packet from B to A driving
PTT and starting acquire on CS". This test will exercise the two modem channels to transfer
a complete message from channel B to channel A. The message makes use of realistic
block types (e.g. Header, Intermediate, and Last blocks) to expose the transmit parameters
and receive information which are involved in a message transfer. In addition, other
information such as the state of the modems’ data quality outputs are observed and
recorded during the course of the experiment. See Section 4.6.6 for a more detailed
description of this test. Please note that this test does not exist in the EV9690xx.EXE
software.
Probes may also be attached to the modem circuits to observe the sequence of hardware
events involved in the transmit and receive process. Test 7 asserts PTT on transmit and
uses CS to trigger the reception process on the receive channel (A). These are important
signals in most wireless systems: Push To Talk is used to key on a radio transmitter and
Carrier Sense is asserted by a radio receiver to trigger a receive modem’s receive process.
2. Click on the GO button. A window containing various transmit message parameters will
appear. These parameters are set to defaults which should be retained for the Quick Start
procedure to avoid inadvertently selecting inappropriate values which could cause the test to
fail. (After the test is operating successfully, go ahead and experiment with modifications.)
3. Click on the OK button to accept the displayed transmit message parameters and execute
the test. The test should finish within a few seconds, displaying a new window containing
receive message information. (If there is no response, the message transfer has failed.
Push and release the HALT switch to abort the test. Check your steps and repeat them if
necessary to make sure they were executed correctly. If the test still will not pass, it is likely
that the motherboard gain and bias adjustments may have been changed from the factory
settings. Refer to Section 3.3 for a description of the adjustment procedure.)
4. The receive message information window reports received data and other important
information e.g. CRC received error check indications. After examining it, click on the OK
button to proceed. A window will appear presenting you with the opportunity to save the
complete test results to a disk file. If desired, click OK to save your results and select a file
name and location.
2.5 Fourth - Explore
Now that you have successfully set up and operated the EV9000 to transfer complete messages,
you can perform many other experiments using your own configurations. Some possibilities are:
measure bit error rates, develop Rx eye diagrams, and determine the affects of noise and dc
offset. You can even integrate the EV9000 with your own rf system.
Read Section 3 Hardware and Section 4 Software to learn more details to support your own
designs.

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3.0 Hardware
3.1 Introduction
This section describes the hardware and its adjustment.
3.2 Description
3.2.1 Functional Layout
The EV9000 motherboard is divided into functional areas as indicated in Figure 5.
Figure 5: Motherboard Functional Layout
3.2.2 Personality Plug-In Boards
The EV9000 motherboard has two complete modem circuits. Each circuit includes a modem IC
and an accompanying personality plug-in board. There are up to four capacitors on the plug-in
board which must be altered for different modem types and data rates. These four capacitors are
used in: Rx filtering, Tx filtering, and two for Rx level measurement. (The Rx level measurement
capacitors are referred to as DOC1 and DOC2 in the modem data sheets.) The locations of these
plug-ins are shown in Figure 5.
Blank plug-ins are also provided and may be populated with user selected components depending
upon desired baud rates and other circuit characteristics. Figure 2 shows the plug-in layout and
indicates each component’s function. Both through-hole and surface mount pads are provided in
each component location. For an explanation of how to make component selections, refer to the
relevant modem data sheets.

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3.2.3 Connectors
Clamping connectors are distributed around the perimeter of the EV9000 motherboard as shown
in Figure 5. Silkscreen labels on the motherboard identify these connectors, listed in Table 6.
Name Type Description
Supply
+5V power Positive digital supply voltage for the motherboard. Used to supply
most components used in the parallel port interface as well as
buffering and amplifier circuits in the modem circuits.
-5V power Interface circuit negative supply
GND power Routed separate from the modem circuits’ signal grounds to
reduce the amount of ground noise which is injected (from the PC
interface circuits) into the modem circuits.
+5VM power The positive supply for both Channel A and B modem ICs. It may
be set independent of the +5V positive supply to support modem
experiments over realistic supply voltage ranges.
AGND power The analogue ground for analogue signals including Rx, Tx, and
injected noise. Several connectors are provided with access to
this node.
Channel A
RXINA input Receive input modem channel A
TXOUTA output Transmit output modem channel A
NSA1 input Noise source input #1 modem channel A
NSA2 input Noise source input #2 modem channel A
Channel B
RXINB input Receive input modem channel B
TXOUTB output Transmit output modem channel B
NSB input Noise source input modem channel B
Radio Control
PTT output Push to talk, used to key an attached transceiver
CS input Carrier sense input indicates that Rx data is (or will soon be) valid
Table 6: Connector Signal Descriptions
3.2.4 Signal Flow
The following block diagrams (Figures 6 to 9) indicate the modem signal flow paths. These
diagrams use coded variables as described in Table 7.
Key Meaning Key Meaning
K# adjustable gain via potentiometer sw# switch control via software
v# adjustable bias via potentiometer E# jumper
Table 7: Signal Path Block Diagram Key

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K2
K3 -1
+
K1
+
2
Rx Modem
A
Personality
Card
K4
v1
E3
v3v2
sw1 sw2
E2
NSA2
NSA1
RXINA
+
-
BIAS
o/c
Figure 6: Channel A Receive Path
Element Purpose Component
Designator Approximate Range
v1 Used to bias the input signal applied to K4 to a nominal
mean dc level of VBIAS (=½ of +5VM). R17 -5V to 5V
v2 Bias corresponding to DC offset #1 software selection.
This allows the user to preset the bias introduced when
the software DC offset #1 is activated.
R15 -5V to 5V
v3 Bias corresponding to DC offset #2 software selection.
This allows the user to preset the bias introduced when
the software DC offset #2 is activated.
R16 -5V to 5V
K1 Gain adjustment on receive data input, RXINA R14 0.5 to 5
K2 Gain adjustment on noise signal input #1, NSA1 R19 0.5 to 5
K3 Gain adjustment on noise signal input #2, NSA2 R18 0.5 to 5
K4 Gain adjustment on composite receive input to modem.
This is generally used to achieve the proper input
signal level to the modem.
R25 0.5 to 5
sw1 Software controlled switch which reflects the software
selection of which noise source is injected. not applicable not applicable
sw2 Software controlled switch which reflects the software
selection of DC offset. not applicable not applicable
E2 Jumper to select choice of ac or dc injected noise
coupling. Jumper installed for dc coupling. E2 not applicable
E3 Jumper to select whether input signal is inverted.
Jumper position A for invert. E3 not applicable
Table 8: Channel A Receive Path Adjustments and Controls
-1 TXOUTA
Modem
A
E4
TXout +
v4
Personality
Card

Evaluation Kit User Manual EV9000
2001 Consumer Microcircuits Limited 17 UM9000/2
Figure 7: Channel A Transmit Path
Element Purpose Component
Designator Approximate Range
v4 Used to bias the output signal to a user desired mean
level. R30 -5V to 5V
E4 Jumper to select choice of ac or dc coupled TXOUTA
connector. Jumper installed for dc coupling. E4 not applicable
Table 9: Channel A Transmit Path Adjustments and Controls
-1 +
K5
+ Rx Modem
B
Personality
Card
K6
v5
NSB
RXINB
E7
K7
2
E8
+
-
BIAS
Figure 8: Channel B Receive Path
Element Purpose Component
Designator Approximate Range
v5 Used to bias the input signal applied to K7 to a nominal
mean dc level of VBIAS (= ½ of +5VM). R38 -5V to 5V
K5 Gain adjustment on noise signal input, NSB R35 0.5 to 5
K6 Gain adjustment on receive data input, RXINB R34 0.5 to 5
K7 Gain adjustment on composite receive input to modem.
This is generally used to achieve the proper input
signal level to the modem.
R43 0.5 to 5
E7 Jumper to select choice of ac or dc receive signal input
coupling. Jumper installed for dc coupling. E7 not applicable
E8 Jumper to select whether input signal is inverted.
Jumper position A for invert. E8 not applicable
Table 10: Channel B Receive Path Adjustments and Controls
-1 + TXOUTB
Modem
B
Personality
Card
E9
TXout
v6

Evaluation Kit User Manual EV9000
2001 Consumer Microcircuits Limited 18 UM9000/2
Figure 9: Channel B Transmit Path
Element Purpose Component
Designator Approximate Range
v6 Used to bias the output signal to a user desired mean
level. R46 -5V to 5V
E9 Jumper to select choice of ac or dc coupled TXOUTB
connector. Jumper installed for dc coupling. E9 not applicable
Table 11: Channel B Transmit Path Adjustments and Controls
3.2.5 Jumpers
Several jumpers are provided to select various functions. They are described in Table 12 and
their positions indicated in Figure 10. Section 3.2.4 also indicates jumper functions in schematic
form. In setting E5, E6, E10 and E11, it should be noted that crystal settings are application, not
device, dependant. If capacitors C3, C7, C12 or C16 are not installed, some of the jumpers will
not operate as described.
Name Function Positions Default
E1 Connect PTT and CS signals
CAUTION: This jumper should not be
installed when the +5VM supply is
less than the +5V supply. For this
case, the header pins may be
connected with a 100k
Ω
ΩΩ
Ω
resistor
without installing the jumper
block.
install in
E2 Channel A noise injection coupling
(see Figure 6) in = dc out = ac in
E3 invert channel A Rx path
(see Figure 6) A = invert B = no invert B
E4 Channel A Tx output coupling
(see Figure 7) in = dc out = ac in
E5 Channel A Xtal frequency
(must match jumper E6 position) A = 8.192MHz (eg. CMX909B) B = 9.8304 MHz (eg. CMX969,
FX919B/929B)
B

Evaluation Kit User Manual EV9000
2001 Consumer Microcircuits Limited 19 UM9000/2
Name Function Positions Default
E6 Channel A Xtal frequency
(must match jumper E5 position) A = 8.192MHz (eg. CMX909B) B = 9.8304 MHz (eg. CMX969,
FX919B/929B)
B
E7 Channel B Rx input coupling
(see Figure 8) in = dc out = ac in
E8 invert channel B Rx path
(see Figure 8) A = invert B = no invert B
E9 Channel B Tx output coupling
(see Figure 9) in = dc out = ac in
E10 Channel B Xtal frequency
(must match jumper E11 position) A = 8.192MHz (eg. CMX909B) B = 9.8304 MHz (eg. CMX969,
FX919B/929B)
B
E11 Channel B Xtal frequency
(must match jumper E10 position) A = 8.192MHz (eg. CMX909B) B = 9.8304 MHz (eg. CMX969,
FX919B/929B)
B
E12 Connects +5V power to +5VM power.
CAUTION: Do not install jumper when
supplies are connected to both of
the +5V and +5VM connectors.
in = connected
out = separate out
E13 Pull-up resistor to pin 1 of the DB25
parallel port connector in = connected
out = isolated in
E14 Pull-up resistor to pin 17 of the DB25
parallel port connector in = connected
out = isolated in
E15 Pull-up resistor to pin 16 of the DB25
parallel port connector in = connected
out = isolated in
E16 Pull-up resistor to pin 14 of the DB25
parallel port connector in = connected
out = isolated in
E17 VDD isolation of Channel B modem IC.
Remove to measure IDD in = connected
out = isolated in
E18 VDD isolation of Channel A modem IC.
Remove to measure IDD. in = connected
out = isolated in
Table 12: Jumpers

Evaluation Kit User Manual EV9000
2001 Consumer Microcircuits Limited 20 UM9000/2
Figure 10: Jumper Locations