CML Microcircuits EV9910B User manual

CMLMicrocircuits
COMMUNICATION SEMICONDUCTOR
S
EV9910B/EV9920B
Evaluation Kit
User Manual
©2010 CML Microsystems Plc
UM9910/6 September 2010 Advance Information
Features
• CMX991 and CMX992 Evaluation
• Receiver:
o LNA
o I/Q or IF Output
o Selectable IF Filters
o Test Access
• 450-470 MHz default operation
• 100MHz to 1GHz evaluation
• Transmitter (CMX991 Only)
o IF and RF Outputs
o I/Q Input Interface
o Gain Control
o Optional o/p Filter and Buffer
• PC control interface available
• Interface to EV9810 or EV9100
1. Brief Description
The EV9910B allows the evaluation of the CMX991 RF Quadrature Transceiver and the EV9920B allows
the evaluation of the CMX992 Quadrature / Low IF Receiver. Both Evaluation Kits use the same printed
circuit board, but with different components fitted. This User Manual is also common to both kits. The
CMX991 is an RF Transceiver IC providing I/Q modulator and up-conversion, superheterodyne receiver
and IF local oscillator. The CMX992 includes only the receiver and IF LO sections of the CMX991 and is
ideal for applications that do not require the CMX991 transmitter, for example when a linearised
transmitter is required, in which case the CMX998 Cartesian Loop Transmitter IC could be used for Tx
and the CMX992 for Rx.

Evaluation Kit for CMX991 and CMX992 EV9910B/EV9920B
©2010 CML Microsystems Plc 2 UM9910/6
Access is provided to all CMX991 (CMX992) RF, baseband and control signals by either connector or test
points. Test access points are available to accept common test equipments, such as RF and baseband
signal generators and spectrum analysers. All signal paths are matched by suitable components. The
EV9910B also provides an optional lumped bandpass filter plus buffer amplifier at 460MHz (default) to aid
evaluation. The overall evaluation frequency range of this Evaluation Kit is for RF frequencies between
100MHz and 1GHz, with default operation over 450MHz to 470MHz. In the form of a populated PCB, this
flexible Evaluation Kit enables users to configure and evaluate the CMX991 (CMX992) devices for various
applications and frequency bands.
The on-board CMX991 (CMX992) is controlled via its C-BUS serial interface. The PE0002 Interface Card
is available separately to support PC-based control of the EV9910B/EV9920B. The PE0002 uses
ES9910xx.exe PC software, part of the ES9910xx.zip file, which is available from the CML website. This
software enables the PE0002 to control either an EV9910B or an EV9920B Evaluation Kit.

Evaluation Kit for CMX991 and CMX992 EV9910B/EV9920B
©2010 CML Microsystems Plc 3 UM9910/6
CONTENTS
Section Page
1. Brief Description.....................................................................................1
2. Preliminary Information..........................................................................6
2.1. Laboratory Equipment ........................................................................ 6
2.2. Power Supply ..................................................................................... 6
2.3. Handling Precautions ......................................................................... 7
2.3.1. Static Protection ........................................................................... 7
2.3.2. Contents - Unpacking .................................................................. 7
2.4. Approvals............................................................................................ 7
3. Quick Start...............................................................................................8
3.1. First – Initial Setup.............................................................................. 8
3.1.1. Make External Connections and Apply Power ............................ 8
3.1.2. Hardware/Software Installation (for PE0002) ............................ 10
3.2. Second – Configure.......................................................................... 11
3.2.1. Rx Configuration ........................................................................ 11
3.2.2. Tx Configuration (CMX991 Only)............................................... 12
3.3. Third – Operate ................................................................................ 14
4. Signal Lists............................................................................................15
5. Circuit Schematics and Board Layouts..............................................21
6. Detailed Description .............................................................................23
6.1. Hardware Description ....................................................................... 23
6.1.1. Receiver (CMX991 and CMX992) ............................................. 23
6.1.2. Transmitter (CMX991 only)........................................................ 25
6.1.3. Local Oscillator (LO) .................................................................. 26
6.1.4. Power Supply............................................................................. 26
6.2. Adjustments and Controls ................................................................ 27
6.2.1. Operation on other frequency bands ......................................... 27
6.2.2. 2nd IF Operation ......................................................................... 27
6.2.3. External IF LO............................................................................ 28
6.2.4. Input to CMX991 (CMX992) 1st Mixer........................................ 28
6.3. Software Description ........................................................................ 28
6.3.1. The ‘C-BUS Control’ Tab ........................................................... 29
6.3.2. The ‘C-BUS Control Extended’ Tabs (C-BUS Ctrl Ext. 1 and 2)29
6.3.3. The ‘CMX991\CMX992 (1)’ Tab ................................................ 31
6.3.4. The ‘CMX991\CMX992 (2)’ Tab ................................................ 32
6.3.5. The Script Handler Tab.............................................................. 33
6.4. Application Information ..................................................................... 36
6.4.1. Rx Testing the CMX991 (CMX992) with the CMX910............... 36
6.5. Troubleshooting................................................................................ 37
6.5.1. General (CMX991 and CMX992)............................................... 37
6.5.2. Receiver Operation (CMX991 and CMX992) ............................ 37
6.5.3. Transmitter Operation (CMX991 only)....................................... 38
7. Performance Specification...................................................................39
7.1. Electrical Performance ..................................................................... 39
7.1.1. Absolute Maximum Ratings ....................................................... 39
7.1.2. Operating Limits......................................................................... 39
7.1.3. Operating Characteristics .......................................................... 40

Evaluation Kit for CMX991 and CMX992 EV9910B/EV9920B
©2010 CML Microsystems Plc 4 UM9910/6
Table Page
Table 1 – Signal List....................................................................................................................... 16
Table 2 – C-BUS 1 Interface.......................................................................................................... 17
Table 3 – EV9810 Auxiliary ADC/DAC Interface ........................................................................... 18
Table 4 – Test Loops ..................................................................................................................... 18
Table 5 – Test Points ..................................................................................................................... 19
Table 6 – Jumper Links.................................................................................................................. 20
Table 7 – EV9910B/EV9920B and EV9100 interconnection details ............................................. 36
Table 8 – Typical sensitivity performance...................................................................................... 36
Table 9 – Typical Adjacent Channel Rejection performance......................................................... 36
Table 10 – Possible general errors................................................................................................ 37
Table 11 – Possible receiver errors ............................................................................................... 37
Table 12 – Transmitter possible errors ..........................................................................................38
Figure Page
Figure 1 – BlockDiagram ................................................................................................................ 5
Figure 2 – Typical Evaluation Connections for EV9910B/EV9920B ............................................... 9
Figure 3 – EV9910B/EV9920B Connection to PC Using PE0002................................................. 10
Figure 4 – USB Driver Installation Message Box........................................................................... 11
Figure 5 – PCB Layout: top............................................................................................................ 21
Figure 6 – PCB Layout: bottom...................................................................................................... 22
Figure 7 – Typical LNA S21 and S11 response ............................................................................... 24
Figure 8 – Typical response of optional Tx filter + buffer............................................................... 26
Figure 9 – The ‘C-BUS Control’ Tab..............................................................................................29
Figure 10 – The ‘C-BUS Control Extended’ Tab............................................................................ 30
Figure 11 – The ‘CMX991\CMX992 (1)’ Tab ................................................................................. 31
Figure 12 – The ‘CMX991\CMX992 (2)’ Tab ................................................................................. 32
Figure 13 – The ‘Script Handler’ Tab............................................................................................. 33
Figure 14 – Loading a Script File................................................................................................... 34
Figure 15 – The ‘Trace Dialog’ Box ............................................................................................... 35
It is always recommended that you check for the latest product datasheet version from the
Datasheets page of the CML website: [www.cmlmicro.com].
This is Advance Information; changes and additions may be made to this specification. Parameters
marked TBD or left blank will be included in later issues. Items that are highlighted or greyed out should
be ignored. These will be clarified in later issues of this document. Information in this advance document
should not be relied upon for final product design.

Evaluation Kit for CMX991 and CMX992 EV9910B/EV9920B
©2010 CML Microsystems Plc 5 UM9910/6
Control
Registers
/4
External
Resonator &
Varactors
Integer-
N PLL
C-BUS
1st IF Xtal
Filters
Differential
RXI & RXQ O/P
Or
2nd IF O/P
Div
Tx I/Q Conditioning
Amps
2nd IF Ceramic Filter
19.2MHz
VCTCXO
LNA
CMX991/
CMX992
C-BUS
Interface
J9
RXIN1
J3
TX_LO
J2
IQMOD_OUT
J11
TXQ
J10
TXI
Differential
IQ Inputs
LNA Control
J5
RXIN2
Tx Buffer Tx Filter
J15
EXT_IF_LO
J1
REFIN
J12
991Tx_OUT
Differential
Amplifiers
J22
RXQ
J23
RXI
J7
IFOUT
J8
IFIN
KEY
Interface Connector
Coax Connector
Test Access Connections
Not Fitted on EV9920B
CMX991 only
J14
TXOUT
Div
J6
RXLO
Figure 1 – Block Diagram

Evaluation Kit for CMX991 and CMX992 EV9910B/EV9920B
©2010 CML Microsystems Plc 6 UM9910/6
2. Preliminary Information
The EV9910B/EV9920B provides a platform for evaluation of either the CMX991 or the CMX992.
The PCB is fitted with either a CMX991 (EV9910B) or a CMX992 (EV9920B).
To use the EV9910B/EV9920B, a separate PC or
micro-controller is required to control the CMX991
(CMX992) via its C-BUS interface. This controller is
not part of the EV9910B/EV9920B kit. A separate
CML product (PE0002) is available which provides
the controller functionality and interfaces to a
standard PC by means of a USB cable.
Part Numbers:
• EV9910B – PCB fitted with CMX991 and fully
populated.
• EV9920B – PCB fitted with CMX992 and with
only LO and Receiver sections populated.
• PE0002 – Universal Controller Card which can
be used for EV9910B/EV9920B.
Note: This kit is referenced generically as
EV9910B/EV9920B throughout this document and
this covers both build states: EV9910B and
EV9920B. Where features are specific to EV9910B
or EV9920B, this is noted, for example ‘CMX991
only’ implies the feature is only available on an
EV9910B kit and not on kits supplied as EV9920B.
2.1. Laboratory Equipment
The following laboratory equipment is
recommended for use with this evaluation kit:
• Power Supply
(Dual Power Supply if using PE0002).
• Spectrum Analyser (100MHz to 1GHz)
• RF Signal Generator(s) (100MHz to 2GHz)
• I/Q Signal Source
• Oscilloscope
• Personal Computer + PE0002 or other C-BUS micro-controller
For more detailed design or investigation work, other RF test equipment may be required.
2.2. Power Supply
The supply input voltage to the PCB is 7.2V (5.25V to 8V acceptable). On board regulators are
provided to generate all voltage rails used on the PCB (3.3V and 5V rails are used).
The 7.2V supply should be rated at 1A.
NOTE: Care should be exercised with the supplies, as they are not protected from reverse
polarity.
NOTE: When using the EV9910B/EV9920B kit with a PE0002 kit, power is not supplied to
the PE0002 via the C-BUS connector (J18). The PE0002 must be connected directly to a
separate +5V regulated power supply.
Glossary
ADC Analogue to Digital Converter
B/B Baseband
BER Bit Error Rate
C-BUS 4-Wire control interface, see
CMX991 (CMX992) Datasheet
CW Continuous Wave
DAC Digital to Analogue Converter
DC Direct Current
EMC Electro-Magnetic Compatibility
ESD Electro-Static Discharge
GUI Graphical User Interface
IF Intermediate Frequency
LNA Low Noise Amplifier
LO Local Oscillator
NF Not Fitted
PA Power Amplifier
PC Personal Computer
PCB Printed Circuit Board
PER Packet Error Rate
PLL Phase Locked Loop
RF Radio Frequency
Rx Receiver
SLI Signal Level Indicator
TBD To Be Decided
Tx Transmitter
VCO Voltage Controlled Oscillator
VGA Variable Gain Amplifier

Evaluation Kit for CMX991 and CMX992 EV9910B/EV9920B
©2010 CML Microsystems Plc 7 UM9910/6
2.3. Handling Precautions
Like most evaluation kits, this product is designed for use in office and laboratory environments.
The following practices will help ensure its proper operation.
2.3.1. Static Protection
This product uses circuits that can be damaged by electrostatic discharge. Partially damaged
circuits can function erroneously, leading to misleading results. Observe ESD precautions at all
times when handling this product.
2.3.2. Contents - Unpacking
Please ensure that you have received all of the items on the separate information sheet (EK9910)
and notify CML within 7 working days if the delivery is incomplete.
2.4. Approvals
This product is not approved to any EMC or other regulatory standard. Users are advised
to observe local statutory requirements, which may apply to this product and the radio
frequency signals that may emanate from it.

Evaluation Kit for CMX991 and CMX992 EV9910B/EV9920B
©2010 CML Microsystems Plc 8 UM9910/6
3. Quick Start
This section provides instructions, in three steps, for users who wish to experiment immediately
with the evaluation kit at 460MHz. This is the default frequency of the kit’s hardware configuration.
A more complete description of the kit and its use appears later in this document. The EV9910B
includes a CMX991 and the EV9920B includes a CMX992 integrated circuit.
Accordingly, before using the EV9910B/EV9920B, the user should read the current CMX991
or CMX992 datasheet.
3.1. First – Initial Setup
3.1.1. Make External Connections and Apply Power
Perform the following steps in sequence:
1. Connect test leads as shown below in Figure 2.
2. Connect a Controller to C-BUS interface J17 or J18 (PE0002 can be used – see Figure 3).
3. Install PE0002 hardware/software and apply power to PE0002 – see section 3.1.2.
4. Power should be applied to the main supply (7.2V nominal).

Evaluation Kit for CMX991 and CMX992 EV9910B/EV9920B
©2010 CML Microsystems Plc 9 UM9910/6
RF Signal
Generator (Signal)
+7.2VGND
Baseband IQ
Generator
Receiver
I/Q
Output RF Signal
Generator (LO)
RF Spectrum
Analyser
-
-
-
-
-
-
-
--
CMX991
(CMX992)
J18
F
2
J16
J23
-
-
--
J
2
0
J
4
J1
J15
J11 J10 J14
J3
J12
J5
J9
J7
J6
J8
J22
-
-
J2
EV9910B
EV9920B
C-BUS
Figure 2 – Typical Evaluation Connections for EV9910B/EV9920B

Evaluation Kit for CMX991 and CMX992 EV9910B/EV9920B
©2010 CML Microsystems Plc 10 UM9910/6
J8
GND+5V
PE0002
USB
Connection
to PC
-
-
-
-
-
-
-
--
CMX991
(CMX992)
J18
F
2
J16
J23
-
-
--
J
2
0
J
4
J1
J15
J11 J10 J14
J3
J12
J5
J9
J7
J6
J8
J22
-
-
J2
EV9910B
EV9920B
+7.2VGND
J3
or
J5
Figure 3 – EV9910B/EV9920B Connection to PC Using PE0002
3.1.2. Hardware/Software Installation (for PE0002)
• Copy the file ‘ES9910xx.zip’, which is downloaded from the CML website following
registration, to the hard drive of your host PC. This is a customised version of the
‘ES0002xx.zip’ software.
• Extract the files to the hard drive of your host PC.
• Connect the PE0002 Interface Card to the EV9910B/EV9920B via the right angle connector,
either J5 or J3. C-BUS port 1 (connector J5) is recommended, for full software functionality.
• Connect a dc supply to the PE0002 Interface Card and set to the voltage level to 5V.
• Connect a dc supply to the EV9910B/EV9920B and set voltage level to 7.2V.
• Attach a USB cable from connector J2 of the PE0002 Interface Card to the PC USB port.
• Turn on the power supply to the PE0002. The power on indicator D6 will light.
• Install the USB driver when requested. The driver is in the same folder where the
’ES9910xx.zip’ files were extracted to, in ‘..\Driver’. Follow instructions on the screen to install
the USB driver. Click the ‘Continue Anyway’ button when the Message Box in Figure 4 is
shown.

Evaluation Kit for CMX991 and CMX992 EV9910B/EV9920B
©2010 CML Microsystems Plc 11 UM9910/6
Figure 4 – USB Driver Installation Message Box
3.2. Second – Configure
In this second step the EV9910B/EV9920B is configured for either Rx (CMX991 and CMX992) or
Tx (CMX991 only) operation.
3.2.1. Rx Configuration
The following steps should be undertaken to configure the CMX991 or CMX992 to receive at
460MHz with an I/Q output. The EV9910B/EV9920B default IF frequency of the receiver is
45MHz and the channel filtering is typical for a 25kHz channel spaced system. Set the applied
signals and register values as per the following table.
Note:
Setting the CMX991 (CMX992) registers requires the use of the host connected as per section
3.1 step 3, above. The CMX991 (CMX992) datasheets give details of the registers and
commands.
Signal or
Register Setting Connector Note
RX_LO input 1010MHz at –10dBm J6 This frequency is twice the LO
frequency that will be used in the
CMX991/2
RXIN1 460.005MHz J9 The input level here is user defined:
for an input signal of –60dBm at J9
the typical single ended output level
would be ~450mVp-p at J4 pin 1.
The output should be 5kHz sine and
cosine waves on I and Q when the
configuration in this table is
completed
RXI/RXQ Rx I/Q output (see register
setting later in table to
select I/Q output)
J22, J23
J4, J20
The J22/23 outputs use the on-chip
baseband differential amplifiers to
convert I and Q differential signals to
single ended. These are only active
if the J4 links 1-2, 3-4, 5-6, and 7-8
are fitted. The differential I and Q
signals can be taken from J4 or J20

Evaluation Kit for CMX991 and CMX992 EV9910B/EV9920B
©2010 CML Microsystems Plc 12 UM9910/6
Signal or
Register Setting Connector Note
General
Reset
CMX991/992
register ($10)
To ensure the device and
hardware are in known
states issue the general
reset command.
The ‘General Reset’ button can be
used, as this writes to register $10
CMX991/2
General
Control
register ($11)
The CMX991/2 general
control register should be
set as follows:
• IF<75MHz [b6]
• NR Minimum [b3-b2]
• I/Q Mode [b5 – b4]
Also enable the:
• Bias generator
• VCO Buffer
• VCO NR Amp
Rx Control
register ($12)
Select the LO/2 mode and
enable the following:
• Rx 1st Mixer
• IF Amp/VGA, I/Q Mixers
and B/B filters
• B/B Differential Amps
• LNA Control Signal
If the Rx Signal Level Indication (SLI)
output is required this is enabled in
this register
Rx Mode
register ($13)
For maximum Rx gain the
VGA attenuation should be
set at 0dB. Select the
following:
• I/Q Filter BW = 100kHz
• MIXOUT1 and IFIN1
Default EV9910B/EV9920B build
uses MIXOUT1 from the 1st Mixer
and the IFIN1 to the IF stages
PLL M and N
Dividers
register
($20-23)
Enable the following:
• Charge pump
• PLL
The default settings for the
IF LO are as follows:
• Required frequency =
180MHz
• Comp frequency =
100kHz
• Ref frequency =
19.2MHz
The default values would be M = 192
and N = 1800
Note: If an external LO is to be used
(see 6.2.3) the PLL circuitry (b7 in
register $21) and the NR amplifier
(b0 in register $11) should be
disabled. The VCO Buffer (b1 in
register $11) should be enabled
3.2.2. Tx Configuration (CMX991 Only)
In order to configure the CMX991 to transmit at 460MHz with an I/Q input, an IF frequency of
90MHz and a typical output power of –8dBm on J12, set the applied signals and register values
as per the following table. (Setting CMX991 registers requires the use of the host connected per
section 3.1 step 3, above. The CMX991 datasheet gives details of the registers and commands).

Evaluation Kit for CMX991 and CMX992 EV9910B/EV9920B
©2010 CML Microsystems Plc 13 UM9910/6
Signal or
Register Setting Connector Note
TX_LO input 740MHz at –10dBm J3
I and Q
baseband inputs
10kHz sine wave on I
and 10kHz cosine wave
on Q. 1V pk-pk, 0V DC.
The I/Q input tones
should be in quadrature
(Note: See also section
6.5.3 regarding I/Q
connections)
J10, J11 These inputs must be connected to
0VDC; do not leave them
unconnected or open circuit
Tx Output 50output at 460MHz J12 An optional filter and amplifier can be
linked into circuit to reduce spurious.
In this case, Tx Out is available at
J14. As default, J14 is not configured
for use
General Reset
CMX991
register ($10)
To ensure the device
and hardware are in
known states issue the
general reset command
The ‘General Reset’ button can be
used, as this writes to register $10
CMX991
General Control
register ($11)
The CMX991 general
control register should
be set as follows:
• IF>75MHz [b6]
• NR Minimum [b3-b2]
• I/Q Mode [b5 – b4]
Also enable the:
• Bias generator
• VCO Buffer
• VCO NR Amp
Tx Control
Register ($14)
Set the LO operating
mode to >600MHz, the
I/Q modulator should be
connected to the image
reject mixer and enable
the following;
• Image Reject Mixer
• I/Q Modulator, filters
and input circuits
Tx Mode Control
Register ($15)
Select the following;
• TxIF Filter BW =
120MHz
• Frf = Flo + Fif
• RFLO /2 mode
• IFLO /2 mode
Both the RF and the IF LO dividers
need to be in /2 mode and this
results in a low side mix with an IF of
90MHz
Tx Gain
Register ($16)
The I/Q input gain
should be set to 0dB
gain
The 0dB gain setting should be used
with a differential input level of 2Vp-p.
PLL M and N
Dividers register
($20-23)
Enable the following:
• Charge pump
• PLL
The default values would be M = 192
and N = 1800

Evaluation Kit for CMX991 and CMX992 EV9910B/EV9920B
©2010 CML Microsystems Plc 14 UM9910/6
The default settings for
the IF LO are as
follows:
• Required frequency
= 180MHz
• Comp frequency =
100kHz
• Ref frequency =
19.2MHz
Note: If an external LO is to be used
(see 6.2.3) the PLL circuitry (b7 in
register $21) and the NR amplifier
(b0 in register $11) should be
disabled. The VCO Buffer (b1 in
register $11) should be enabled
3.3. Third – Operate
Following the configuration procedures given in sections 3.1 and 3.2, the EV9910B/EV9920B
should be operating as a receiver or a transmitter, as appropriate. Various evaluation tests can
now be undertaken.
For the receiver, the typical single ended output level is 400-450mVp-p on each of the I and Q
channels (e.g. J4 pin 1) with a –60dBm input signal level. For the suggested 460.005MHz CW
input signal the output should be 5kHz sine and cosine waves on I and Q.
(Note: See also section 6.5.3 regarding I/Q connections)

Evaluation Kit for CMX991 and CMX992 EV9910B/EV9920B
©2010 CML Microsystems Plc 15 UM9910/6
4. Signal Lists
CONNECTOR PINOUT
Connector
Ref. Connector
Pin No. Signal Name Signal Type Description
J1 N/A REFIN RF Input for external reference source for PLL. To
use this input C3 needs to be fitted to the PCB
and C4 removed.
J2 1N/A IQMOD_OUT RF Tx I/Q Modulator Output (50), this output has to
be selected in the Tx Control Register ($14 – b0)
J3 1N/A TX_LO RF Transmitter main LO input
J4 1,3 RXI+, RXI- Baseband Receiver I differential output
J4 8, 5 RXQ+, RXQ- Baseband Receiver Q differential output
J4 2 IAMPN Baseband I channel amplifier negative input (R14 in series)
J4 4 IAMPP Baseband I channel amplifier positive input (R16 in series)
J4 6 QAMPP Baseband Q channel amplifier positive input (R27 in series)
J4 7 QAMPN Baseband Q channel amplifier negative input (R28 in
series)
J5 N/A RXIN2 RF Input to Rx 1st Mixer or access to LNA output. To
use this connector fit C25 and remove R49.
J6 N/A RX_LO RF Receiver main LO Input
J7 N/A IF OUT RF Receiver IF output from 1st mixer (Note this
connector provides test access and must
specifically be configured for a particular
measurement; default state is not connected.)
J8 N/A IF IN RF Receiver 1st IF input (Note this connector
provides test access and must specifically be
configured for a particular measurement; default
state is not connected.)
J9 N/A RXIN1 RF Receiver LNA input
J10 1N/A TXI Baseband Transmitter I Channel Input
J11 1N/A TXQ Baseband Transmitter Q Channel Input (See also section
6.5.3 regarding I/Q connections)
J12 1N/A 991_TX_OUT RF Transmitter Image Reject Mixer Output
J13 N/A N/A N/A not fitted
J14 1N/A TX OUT RF Tx Buffer Output (default state is not configured)
1EV9910B only

Evaluation Kit for CMX991 and CMX992 EV9910B/EV9920B
©2010 CML Microsystems Plc 16 UM9910/6
CONNECTOR PINOUT
Connector
Ref. Connector
Pin No. Signal Name Signal Type Description
J15 N/A EXT_IF_LO RF External IF LO input (See section 6.2.3
concerning use of this input)
J16 2 +7.2V DC 7.2V power supply input
J16 1 GND DC Power supply ground
J17 1 – 10 Alternative
C-BUS
Interface
Logic Alternative header for C-BUS interface (Default
C-BUS connection is J18)
J18 1 – 20 C-BUS
Interface
Logic C-BUS interface from PE0002 or host controller.
See schematics, CMX991 (CMX992) datasheet
and Table 2 for details.
J1911, 2, 4, 5 TXQ+, TXQ-
TXI-, TXI+
Baseband Differential I/Q input, e.g. from a CMX981
evaluation board (EV9810) (See also section
6.5.3 regarding I/Q connections)
J1913 GNDA DC Connection to Analogue Ground
J20 2, 4, 8, 10 RXI+, RXI-
RXQ-, RXQ+
Baseband Differential I/Q output
J20 5 GNDA DC Connection to Analogue Ground
J20 1,3,7.9 NC - No connection
J21 1 – 20 ADC/DAC
Interface
Baseband Auxiliary ADC/DAC connector – not fitted
(e.g. for connection to EV9810, seeTable 3)
J22 N/A RXQ Baseband Receiver Q channel output from QAMPO
J23 N/A RXI Baseband Receiver I channel output from IAMPO
Table 1 – Signal List
Notes: I/P = Input
O/P = Output
BI = Bidirectional
TL = Test Loop
TP = Test Point
1EV9910B only

Evaluation Kit for CMX991 and CMX992 EV9910B/EV9920B
©2010 CML Microsystems Plc 17 UM9910/6
CONNECTOR PINOUT for J18
Connector
Pin No. Signal Name Signal Type Description
1 RESET I/P General RESET (RESET active low)
2 CSN I/P C-BUS Enable
3 ~ ~ Spare pin. Leave unconnected.
4 CDATA I/P C-BUS Data Input
5 ~ ~ Spare pin. Leave unconnected.
6 SCLK I/P C-BUS Clock
7 ~ ~ Spare pin. Leave unconnected.
8 RDATA O/P C-BUS Data Output
9 ~ ~ Spare pin. Leave unconnected.
10 IRQN I/P Interrupt request - if required. Not used.
11 GNDD Power Connection to Digital Ground
12 GNDD Power Connection to Digital Ground
13 ~ ~ Spare pin. Leave unconnected.
14 ~ ~ Spare pin. Leave unconnected.
15 ~ ~ Spare pin. Leave unconnected.
16 ~ ~ Spare pin. Leave unconnected.
17 ~ ~ Spare pin. Leave unconnected.
18 ~ ~ Spare pin. Leave unconnected.
19 ~ ~ Spare pin. Leave unconnected.
20 ~ ~ Spare pin. Leave unconnected.
Table 2 – C-BUS 1 Interface

Evaluation Kit for CMX991 and CMX992 EV9910B/EV9920B
©2010 CML Microsystems Plc 18 UM9910/6
CONNECTOR PINOUT for J21 – connector not
fitted
Connector
Pin No. Signal Name Signal Type Description
1 AUXADC2 O/P TP30
3 AUXADC1 O/P Receiver Signal Level Indicator (SLI)
5 AUXADC3 O/P TP26
7 AUXADC4 O/P TP27
9 AUXADC5 O/P TP28
11 AUXADC6 O/P TP29
13 AUXDAC2 I/P TL8
15 AUXDAC1 I/P suitable for an external PA Control signal
17 AUXDAC3 I/P AFC
19 AUXDAC4 I/P TP19
2, 4, 6, 8,
10, 12, 14,
16, 18, 20
GNDD Power Connection to digital ground
Notes: I/P = Input
O/P = Output
BI = Bidirectional
TL = Test Loop
TP = Test Point
Table 3 – EV9810 Auxiliary ADC/DAC Interface
TEST LOOPS
Test Loop
Ref. Default
Measurement Description
TL1 - This TL is not present on EV9910B/EV9920B
TL2 0V RXI (IAMPO) – default state is not fitted
TL3 1.9V Receiver Signal Level Indicator (SLI) – default state is not fitted
TL4 0V RXQ (QAMPO)
TL5 0V Analogue ground
TL6 0V C-BUS RDATA
TL7 - This TL is not present on EV9910B/EV9920B
TL8 - This TL is not present on EV9910B/EV9920B
TL9 0V Digital ground
Table 4 – Test Loops

Evaluation Kit for CMX991 and CMX992 EV9910B/EV9920B
©2010 CML Microsystems Plc 19 UM9910/6
TEST POINTS
Test Point
Ref. Default
Measurement Description
TP1 3.25V LNA ON
TP2 1.6V TXI+
TP3 1.6V TXQ+ (See also section 6.5.3 regarding I/Q connections)
TP4 1.6V TXI-
TP5 1.6V TXQ- (See also section 6.5.3 regarding I/Q connections)
TP6 -
J21 Pin 15 (AuxDAC1 on separate EV9810 board if connected to
EV9910B/EV9920B)
TP7 1.0V – 2.5V CMX991/CMX992 IF VCO tuning voltage (1.7V typical)
TP8 3.3V 3.3V regulator output for digital circuits
TP9 3.3V 3.3V regulator output for analogue circuits
TP10 -
J21 Pin 13 (AuxDAC2 on separate EV9810 board if connected to
EV9910B/EV9920B)
TP11 1.65V AFC (VCTCXO Control Voltage)
TP12 - C-BUS IRQN not used in EV9910B / EV9920B
TP13 This TP is not present on EV9910B/EV9920B
TP14 5.0V 5.0V regulator output for baseband circuits
TP15 3.3V 3.3V regulator output for VCO/PLL circuits
TP16 5.0V 5.0V regulator output for RF circuits
TP17 1.6V VBIAS
TP18 3.3V VDDIO
TP19 -
J21 Pin 19 (AuxDAC4 on separate EV9810 board if connected to
EV9910B/EV9920B)
TP20 0V GNDA (NOT MARKED ON SILK SCREEN)
TP21 - Spare CS1 (J17)
TP22 - Spare CS2 (J17)
TP23 - Spare CS3 (J17)
TP24 - Spare CS4 (J17)
TP25 - IRQN (J17 not used in EV9910B / EV9920B)
TP26 - J21 Pin 5 (AuxADC3 on separate EV9810 board if connected)
TP27 - J21 Pin 7 (AuxADC4 on separate EV9810 board if connected)
TP28 - J21 Pin 9 (AuxADC5 on separate EV9810 board if connected)
TP29 - J21 Pin 11 (AuxADC6 on separate EV9810 board if connected)
TP30 - J21 Pin 1 (AuxADC2 on separate EV9810 board if connected)
Table 5 – Test Points

Evaluation Kit for CMX991 and CMX992 EV9910B/EV9920B
©2010 CML Microsystems Plc 20 UM9910/6
Jumper Links
Ref. Default
Setting Description
JP1 Connected +3.3V digital power supply rail
JP2 Connected +3.3V analogue power supply rail
JP3 Connected +5.0V baseband power supply rail (EV9910B only)
JP4 Connected +3.3V VCO/PLL power supply rail
JP5 Connected +5.0V RF power supply rail
J4 Open Note: Jumpers can be used on J4 (see Table 1) to configure receiver
outputs for I/Q output or connection to 455kHz filter.
Table 6 – Jumper Links