West Mountain Radio CLRmodule ClearSpeech User manual

www.westmountainradio.com
1020 Spring City Drive
Waukesha, WI 53186
262-522-6503
[email protected]
©2019 West Mountain Radio, All rights reserved. All trademarks are
the property of their respective owners.
CLRmodule ClearSpeech®
Digital Signal Processor
Noise Reduction Board

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West Mountain Radio Operating Manual
Thank you for choosing the CLRmodule ClearSpeech®Digital Signal
Processor Noise Reduction Board. The CLRmodule unit connects
directly to the radio. The unit is extremely e󰀨ective in improving
communication clarity. QSO’s will be more enjoyable without the
fatigue of background noise. In many cases, there will be a noticeable
improvement in understanding weaker signals, making contacts, and
general listening.
CLRmodule is ideal for mobile radio operation as noise reduction is
superb due to the Digital Signal Processor (DSP) passing voice and
CW sounds, while attenuating noise, such as atmospheric noise,
hum, hiss, whistles, and static. It e󰀨ectively removes heterodynes,
ignition noise, lightning crashes and power line noise. The process
is dynamic and changes with the interference and the signal, but the
e󰀨ect is rewarding. Mobile voice operation is more fun without all of
the background noise. The DSP recognizes the intermittent nature of
CW and allows it to pass noise free.
Mechanical Mounting
Horizontal: Mount with 4-40 hardware. Include a 0.2” (or 5mm) spacer
between CLRmodule and your PCB.
Vertical: Solder a Keystone 8190 bracket onto the CLRmodule. Then
use a 4-40 bolt to attach CLRmodule to a 0.75” F-F stando󰀨 on your
PCB. For the electrical connector use a 2x7 F straight connector.
2.00 in
1.19 in

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West Mountain Radio Operating Manual
Electrical Connections
1 Not Used NC
2 Power Regulated +3.3VDC, 98mA typical
3 Power Digital Ground
4 Power Analog Ground. For proper operation, Analog
Ground must connect to Digital Ground on
your PCB
5 In Audio Signal In. Maximum signal level (volume
control fully clockwise) 40mVpp
6 Out Audio Signal Out. Maximum signal level: 2Vpp into
a high impedance load, 560mVpp into
8 Ohms
7 In Optional Filter control pot wiper (0-3.3V)
8 In Optional Tone control pot wiper (0-3.3V)
9 In Optional Volume control pot wiper (0-3.3V)
10 Out Optional Clip LED control - 0 or 3.3V - Requires external
limiting resistor. Hi output indicates clipping.
11 In Optional Serial interface (CLRmodule RX) 0-3.3V
12 Out Optional Serial interface (CLRmodule TX) 0-3.3V
13 In Optional PTT signal (0-15VDC) - Active lo
14 In Optional Reset - Active Low (may be left unconnected)
Pin 1
Pin 13
Pin 14
Pin 2

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West Mountain Radio Operating Manual
Potentiometer Controls
As shipped, the CLRmodule will expect three potentiometers
(1K to 10K) for the volume, lter and tone to be connected. Using the
serial interface, the module may be congured to ignore any of these
inputs, making digital controls over the serial interface the only way
to change the settings. Once congured, the settings remain in e󰀨ect
even after power is removed.
Serial Interface
This interface is a 115.2K baud 0-3.3V, no parity asynchronous serial
communication port.
The message format for commands is:
Start of Message Length Command Data
4 Count of bytes not
including the 4
See Table See Table
1 byte 1 byte 1 byte 0-66 Bytes
Example to read CLRmodule State:
Send three bytes: 04 02 03
Receive: 04 03 03 00
Length and
Command
Description Response
02 01 Report Firmware Version 04 05 01 xx yy zz
xx Major Version,
yy Minor Version,
zz Serial Interface Version
02 02 Report Friendly Name 02 xx 02 dd...
dd string is text name

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West Mountain Radio Operating Manual
02 03 Report State 04 03 03 xx
xx bit 0 - Filtering o󰀨
xx bit 1 - Transmit Mode
xx bit 2 - Clipping
xx bit 7 - PTT input active
02 04 Report Conguration 04 03 04 xx
xx bit 0 - Volume POT o󰀨
xx bit 1 - Filter POT o󰀨
xx bit 2 - Tone POT o󰀨
xx bit 3 - PTT is hardwired
02 08 Read Volume Setting 04 04 08 ll hh
hhll - Volume 00-FF
02 09 Read Filter Setting 04 04 09 ll hh
hhll - Filter 0000-FFFF
02 0A Read Tone Setting 04 04 0A ll hh
hhll - Tone 0000-FFFF
05 3D nn ll hh Read CLRmodule
memory, nn bytes at
address hhll
04 ss 3D dd...
hhll - Tone 0000-FFFF
nn 42 dd... Assign friendly name
nn number of bytes in
name +2
dd name in ASCII
02 xx 02 dd...
dd string is text name
03 44 xx Write Conguration Same as cmd 04
04 48 ll hh Set Volume to hhll Same as cmd 08
04 49 ll hh Set Filter to hhll Same as cmd 09
04 4A ll hh Set Tone to hhll Same as cmd 0A
xx 7D nn ll hh dd... Write CLRmodule
memory, nn bytes at
address hhll.
xx is nn+5
Same as cmd 3D
xx C2 xx... Update Firmware. Use
the PC utility to update
rmware
Other Invalid 3F

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West Mountain Radio Operating Manual
PC Utility
When connected to a PC, a COM port will appear at the PC. If one
does not appear (usually due to an older version of Windows) you will
need to install the WMR drivers. The USB drivers can be installed by
using the WMR Device Diagnostic Utility. This utility can be found on
the West Mountain Radio website under Support > Downloads
(www.westmountainradio.com/content.php?page=wmr-downloads)
The CLRmod PC Utility program
can be downloaded from the
aforementioned download page to
monitor and control the CLRmodule.
A hardware interface must be
provided to interface the 0-3.3V
signals on the CLRmodule to the PC
RS232 port or a USB port.
The CLRstereo has two
CLRmodules inside and it has a
USB interface connected to those
modules. This provides an easy-
to-use development platform for the
CLRmodule.
Hardware Development Tools
West Mountain Radio o󰀨ers the
CLRmodule Development Board
(Sku #58413-1770). This is a bare
PCB that can be used to aid in
development. The PCB layout is
image to the right and schematic on
the following page.

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West Mountain Radio Operating Manual
CLRmodpad
Page 1 of 1
Rev 1
Filter<<
Tone<<
Vol<<
~PTT<<
TX>>
RX<<
~RST<<
Clip>>
Audio<<
Audio>>
+3.3V<<
GND<<
AGND<<
NC
01-JUN-19
1X1
1X2
2x7 Header
1
2
3
4
5
6
7
8
9
10
11
12
13
14
J1
D1
R21
220
D3
R13
220
C3
.01
D4
BAT54WS-7-F
FB3
Fbead
FB1
Fbead
C6
.01
+
C12
47uf 25V
C7
.1
D7
1GAIN
3+IN
2-IN
4GND 5
OUT
6
VCC
7
BYPASS
8
GAIN
U5
LM386
+
C1
47uf 16V
C8
.1
P1
P2
P3
P4
P5
P6
P7
P8
P9
P10
P11
P12
P13
P14
P15
P16
P17
P18
P19
P20
C2
.05
R1
10
C4
.1
IN
GND
OUT
U8
3.3V Volt Reg
+
C5
4.7uf
1X3
1X4
MCLR
+3.3V
+3.3V
+3.3V
+3.3V
+3.3V
+3.3V

CLRmodule Warranty
CLRmodule is warranted against failure due to defects in
workmanship or materials for one year after the date of purchase
from West Mountain Radio. Warranty does not cover damage caused
by abuse, accident, misuse, improper or abnormal usage, failure to
follow instructions, improper installation, alteration, lightning, or other
incidence of excessive voltage or current. If failure occurs within this
period, return the CLRmodule or accessory to West Mountain Radio
at your shipping expense. The device or accessory will be repaired
or replaced, at our option, without charge, and returned to you at our
shipping expense. Repaired or replaced items are warranted for the
remainder of the original warranty period. You will be charged for
repair or replacement of the CLRmodule or accessory made after the
expiration of the warranty period.
West Mountain Radio shall have no liability or responsibility to
customer or any other person or entity with respect to any liability,
loss, or damage caused directly or indirectly by use or performance
of the products or arising out of any breach of this warranty, including,
but not limited to, any damages resulting from inconvenience, loss of
time, data, property, revenue, or profit, or any indirect, special incidental, or
consequential damages, even if West Mountain Radio has been advised
of such damages.
Except as provided herein, West Mountain Radio makes no express
warranties and any implied warranties, including fitness for a particular
purpose, are limited in duration to the stated duration provided herein.
www.westmountainradio.com
1020 Spring City Drive, Waukesha, WI 53186
tel [phone] fax [phone]