Sonifex PC-AM6-32 User manual
PC-AM6-32 Handbook
Made in the UK by
This handbook is for use with the following product:
PC-AM6-32 AM Radcap PCIe Card (6 to 32 Channels)
Stock Code: 30-404
©Sonifex Ltd, 2014
All Rights Reserved
Revision 1.00, October 2014
Sonifex Ltd, 61, Station Road, Irthlingborough,
Northants, NN9 5QE, England.
Tel: +44 (0)1933 650 700
Fax: +44 (0)1933 650 726
Website: http://www.sonifex.co.uk
Information in this document is subject to change without notice and does not represent a
commitment on the part of the vendor. Sonifex Ltd shall not be liable for any loss or damage
whatsoever arising from the use of information or any error contained in this manual.
No part of this manual may be reproduced or transmitted in any form or by any means, electronic
or mechanical, including photocopying, recording, information storage and retrieval systems, for any
purpose other than the purchaser’s personal use, without the express written permission of Sonifex
Ltd. Unless otherwise noted, all names of companies, products and persons contained herein are part
of a completely fictitious adaptation and are designed solely to document the use of Sonifex product.
Contents
Contents
Product Warranty - 2 Year Extended ii
Sonifex Warranty & Liability Terms & Conditions ii
1. Definitions ii
2. Warranty ii
Unpacking Your Product iv
Repairs & Returns iv
WEEE Directive vi
RoHS Directive vi
Atmosphere vi
Electromagnetic Compatibility vi
Introduction 1
System Requirements 1
Specifications 1
Installation 2
Antenna 2
Configuration 3
Setting Station Frequencies 4
Recording 5
Support 5
Technical Specification For PC-AM6-32 6
Appendix A – Programming the Radcap 7
Figures
Figures
Fig 1-1: AM Spectrum 500-1700 kHz Screen 3
Fig 1-2: AM Radcap PCIe Properties 3
Fig 1-3: Radcap Monitor Screen 4
Warranty Registration
Sonifex Limited y61 Station Road yIrthlingborough yNorthamptonshire yNN9 5QE yUnited Kingdom
Tel: +44 (0)1933 650 700 yFax: +44 (0)1933 650 726 yEmail: [email protected] yInternet: www.sonifex.co.uk
As standard, Sonifex products are supplied with a 1 year back to base warranty.
If you register the product online, you can increase your product warranty to
2 years and we can also keep you informed of any product design improvements
or modifications.
To register your product, please go online to www.sonifex.co.uk/register
Register Online for an
Extended 2 Year Warranty
ii
Warranty
Product Warranty - 2 Year Extended
As standard, Sonifex products are supplied with a 1 year back to base
warranty. In order to register the date of purchase and so that we can keep
you informed of any product design improvements or modifications, it is
important to complete the warranty registration online. Additionally, if you
register the product on the Sonifex website within 30 days of purchase, you
can increase your product warranty to 2 years. Go to the Sonifex website at:
http://www.sonifex.co.uk/technical/register/index.asp to apply for your 2
year warranty.
Note: For your own records the product serial number is recorded on the
CE certification page of this handbook.
Sonifex Warranty & Liability Terms & Conditions
1. Definitions
‘the Company’ means Sonifex Ltd and where relevant includes companies
within the same group of companies as Sonifex Limited.
‘the Goods’ means the goods or any part thereof supplied by the Company
and where relevant includes: work carried out by the Company on items
supplied by the Purchaser; services supplied by the Company; and software
supplied by the Company.
‘the Purchaser’ means the person or organisation who buys or has agreed
to buy the Goods.
‘the Price’ means the Price of the Goods and any other charges incurred by
the Company in the supply of the Goods.
‘the Warranty Term’ is the length of the product warranty which is usually
12 months from the date of despatch; except when the product has been
registered at the Sonifex website when the Warranty Term is 24 months
from the date of despatch.
‘the Contract’ means the quotation, these Conditions of Sale and any
other document incorporated in a contract between the Company and the
Purchaser.
This is the entire Contract between the parties relating to the subject
matter hereof and may not be changed or terminated except in writing in
accordance with the provisions of this Contract. A reference to the consent,
acknowledgement, authority or agreement of the Company means in
writing and only by a director of the Company.
2. Warranty
a. The Company agrees to repair or (at its discretion) replace Goods
which are found to be defective (fair wear and tear excepted) and
which are returned to the Company within the Warranty Term
provided that each of the following are satisfied:
i. notification of any defect is given to the Company immediately
upon its becoming apparent to the Purchaser;
ii. the Goods have only been operated under normal operating
conditions and have only been subject to normal use (and
in particular the Goods must have been correctly connected
and must not have been subject to high voltage or to ionising
radiation and must not have been used contrary to the
Company’s technical recommendations);
iii. the Goods are returned to the Company’s premises at the
Purchaser’s expense;
iv. any Goods or parts of Goods replaced shall become the
property of the Company;
v. no work whatsoever (other than normal and proper
maintenance) has been carried out to the Goods or any part of
the Goods without the Company’s prior written consent;
iii
Warranty
vi. the defect has not arisen from a design made, furnished or
specified by the Purchaser;
vii. the Goods have been assembled or incorporated into other
goods only in accordance with any instructions issued by the
Company;
viii. the defect has not arisen from a design modified by the
Purchaser;
ix. the defect has not arisen from an item manufactured by
a person other than the Company. In respect of any item
manufactured by a person other than the Company, the
Purchaser shall only be entitled to the benefit of any warranty or
guarantee provided by such manufacturer to the Company.
b. In respect of computer software supplied by the Company the
Company does not warrant that the use of the software will be
uninterrupted or error free.
c. The Company accepts liability:
(i) for death or personal injury to the extent that it results from the
negligence of the Company, its employees (whilst in the course
of their employment) or its agents (in the course of the agency);
(ii) for any breach by the Company of any statutory undertaking as
to title, quiet possession and freedom from encumbrance.
c. Subject to conditions (a) and (c) from the time of despatch of
the Goods from the Company’s premises the Purchaser shall be
responsible for any defect in the Goods or loss, damage, nuisance
or interference whatsoever consequential economic or otherwise or
wastage of material resulting from or caused by or to the Goods. In
particular the Company shall not be liable for any loss of profits or
other economic losses. The Company accordingly excludes all liability
for the same.
e. At the request and expense of the Purchaser the Company will test
the Goods to ascertain performance levels and provide a report of
the results of that test. The report will be accurate at the time of the
test, to the best of the belief and knowledge of the Company, and the
Company accepts no liability in respect of its accuracy beyond that
set out in Condition (a).
f. Subject to Condition (e) no representation, condition, warranty or
other term, express or implied (by statute or otherwise) is given by
the Company that the Goods are of any particular quality or standard
or will enable the Purchaser to attain any particular performance
or result, or will be suitable for any particular purpose or use
under specific conditions or will provide any particular capacity,
notwithstanding that the requirement for such performance, result or
capacity or that such particular purpose or conditions may have been
known (or ought to have been known) to the Company, its employees
or agents.
g. (i) To the extent that the Company is held legally liable to the
Purchaser for any single breach of contract, tort, representation
or other act or default, the Company’s liability for the same
shall not exceed the price of the Goods.
(ii) The restriction of liability in Condition (g)(i) shall not apply to
any liability accepted by the Seller in Condition (c).
h. Where the Goods are sold under a consumer transaction (as defined
by the Consumer Transactions (Restrictions on Statements) Order
1976) the statutory rights of the Purchaser are not affected by these
Conditions of Sale.
iv
Warranty
Unpacking Your Product
Each product is shipped in protective packaging and should be inspected
for damage before use. If there is any transit damage take pictures of the
product packaging and notify the carrier immediately with all the relevant
details of the shipment. Packing materials should be kept for inspection and
also for if the product needs to be returned.
The product is shipped with the following equipment so please check to
ensure that you have all of the items below. If anything is missing, please
contact the supplier of your equipment immediately.
Item Quantity
Product Unit 1
Handbook 1
Driver CD 1
If you require a different power lead, please let us know when ordering the
product.
Repairs & Returns
Please contact Sonifex or your supplier if you have any problems with your
Sonifex product. Email technical.support@sonifex.co.uk for the repair/
upgrade/returns procedure, or for support & questions regarding the
product operation.
v
CE Certification
61 Station Road • Irthlingborough • Northants
NN9 5QE • United Kingdom • www.sonifex.co.uk
T: +44 (0)1933 650 700 • F: +44 (0)1933 650 726
Registered Office • 61 Station Road • Irthlingborough • Registered in England 1717864 • VAT Reg No. GB 119 85 32 52
CE Declaration of Conformity
and Approval Information
Product:
Serial No:
This document certifies that the Sonifex product that you have purchased is
compliant with CE specifications. If you would like further information on
compliance of all Sonifex products, please check the website at the address
above where full information is available.
Sonifex Limited hereby certify that the following product with serial
number shown has been designed and manufactured in accordance with
the following specifications:
EMC: EN 55103-1: 1997 Electromagnetic Compatibility.
Limits of disturbance for audio apparatus for professional use
For use in environments 1 to 4.
EN 55103-2: 1997 Electromagnetic Compatibility.
Limits of disturbance for audio apparatus for professional use
For use in environments 1 to 4.
Safety: EN 60950: 1992 Safety of Information Technology Equipment
Including Electrical Business Equipment.
Hybrid BS6301, BS7002, BS415, CTR21,
Approvals: R&TTE directive (1999/5/EC)
The Reference Technical Justification File for this product is available at
Sonifex Ltd.
Authorised By:
Name: Chris Stills
Position: Technical Director
Date of Issue: 01 October 2014
Signature:
vi
Safety & Installation
WEEE Directive
The Waste Electrical and Electronic Equipment (WEEE)
Directive was agreed on 13 February 2003, along with the
related Directive 2002/95/EC on Restrictions of the use of
certain Hazardous Substances in electrical and electronic
equipment (RoHS). The Waste Electrical and Electronic Equipment Directive
(WEEE) aims to minimise the impacts of electrical and electronic equipment
on the environment during their life times and when they become waste.
All products manufactured by Sonifex Ltd have the WEEE directive label
placed on the case. Sonifex Ltd will be happy to give you information about
local organisations that can reprocess the product when it reaches its “end
of use”, or alternatively all products that have reached “end of use” can be
returned to Sonifex and will be reprocessed correctly free of charge.
RoHS Directive
The RoHS directive limits the use of certain hazardous
substances currently used in EEE manufacture, including
lead, mercury, cadmium, hexavalent chromium, and
halide-containing compounds PBB (polybrominated biphenyl) and PBDE
(polybrominated diphenyl ether). Elimination of these substances will result
in more environmentally friendly recycling of electronic equipment.
Sonifex Ltd practices lead-free (LF) manufacturing processes and does not
use any of the hazardous substances identified in the European Union’s
Restriction of Hazardous Substances (RoHS) directive. The manufacturing
processes include the assembly of purchased components from various
sources. Product is offered as RoHS compliant, or LF, only after sufficient
evidence is received from the component manufacturers that their
components are RoHS compliant. Sonifex Ltd relies solely on the distributor,
or manufacturer, of the components for identification of RoHS compliance.
Thus whilst every effort is made to ensure compliance, Sonifex Ltd makes
no warranty, or certification, or declaration of compliance concerning said
components.
Atmosphere
The units should be installed in an area that is not subject to excessive
temperature variation (<0°C, >50°C), moisture, dust or vibration.
Electromagnetic Compatibility
Warning: This is a Class A product. In a domestic environment this product
may cause radio interference in which case the user may be required to
take adequate measures.
This product complies with the relevant tested clauses of AS/NZS CISPR
22:2009 +A1:2010 and AS/NZS CISPR 13:2012.
This product complies with the relevant tested clauses of EN55022:2010,
EN55013:2013, EN55024:2010, EN61000-3-2:2009 and EN61000-3-3:2013.
Note: This equipment has been tested and found to comply with the limits
for a Class A digital device, pursuant to part 15 of the FCC Rules. These
limits are designed to provide reasonable protection against harmful
interference when the equipment is operated in a commercial environment.
This equipment generates, uses, and can radiate radio frequency energy
and, if not installed and used in accordance with the instruction manual,
may cause harmful interference to radio communications. Operation of this
equipment in a residential area is likely to cause harmful interference in
which case the user will be required to correct the interference at his own
expense.
1
Introduction 1
Introduction
The AM Radcap PCIe card is a radio capture card designed for simultaneous
recording of up to 32 radio stations. The frequency of each individual
station may be set in software and its audio appears as a standard Windows
audio input device.
The AM Radcap uses a high speed analogue-to-digital converter to digitise
the entire AM band, with advanced digital signal processing on a Spartan 6
FPGA used to tune and extract the audio for each individual station. It can
be configured to either create a separate audio stream for each station or
to pair stations together as 2-channel streams.
A WDM driver for Windows XP, Windows 7/8 and other versions is supplied
as well software for setting the tuner frequencies and monitoring the
received audio.
A recording level control, mute control and peak meter are provided for
each station (or pair of stations) through the devices’ mixer ports. The
default level setting is 50%, and at this setting 100% modulation will
produce a peak audio level 6dB below clipping.
A utility called AmSpectrum is supplied. This displays the RF spectrum from
500kHz to 1700kHz and may be useful in selecting the best location for the
antenna or resolving interference problems. The receiver bandwidth can
be set to wide (default) or narrow. The narrow setting restricts the audio
response to about 3kHz, which may be useful in noisy environments.
A utility program called Tuner is also supplied which can be used to set
the frequency of each station and to monitor each station through the
PC’s standard sound card or motherboard sound port. The Tuner program
also provides relative signal strength indicator bars which may be useful in
adjusting antenna placement.
The card is factory-configured for 6 (PC-AM6), 12, 18, 24 or 32 (PC-AM32)
stations, but needs licensing on your PC hardware. It may be expanded in
the field for an additional charge.
System Requirements
Platform: Windows XP, Server 2003, Vista, Server 2008, 7,
Server2008-R2, 8, Server 2012 (32- or 64-bit
versions)
Processor: 500MHz Pentium II or better
Memory: 128MB minimum
Motherboard: PCI Express version 1.0 or later
Other: Sound card or motherboard sound port for
monitoring
2
1 Installation
Specifications
Tuning range: 500kHz to 1710kHz in 1kHz steps
Sensitivity: 50uV for 40dB S/N
Maximum input level: 200mVp-p
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Filter attenuation: 82dB at 15kHz or more from centre frequency
Audio bandwidth: 5kHz (wide) or 3kHz (narrow)
Audio distortion: < 0.1%
Audio sampling rate: 22.05 kHz (other rates supported via Windows
SRC)
Number of stations: 6, 12, 18, 24 or 32 (factory configured but user-
expandable)
Installation
The AM Radcap card uses static-sensitive components. Observe the usual
precautions against static electricity when handling the card and do not
touch the PCIe edge connector contacts.
Ensure that Windows XP (SP2 or later), Server 2003, Server 2008, Vista, 7,
Server 2008-2, 8 or Server 2012 is installed on the PC. The AM Radcap card
cannot be used under Windows 9x or Windows ME, 2000 and versions of
XP prior to SP2. The latest Service Pack should be installed.
Switch off the PC and unplug the power lead. Insert the card into any vacant
PCIe slot. Although the card is single-lane, it can be used in multi-lane slots
as the PCIe protocol automatically negotiates lane width.
Restart the PC and allow Windows to boot up.
Windows XP, Server 2003, Vista, Server 2008 - Windows will report that
new hardware has been found and the New Hardware wizard will start.
Insert the driver CD supplied with the card and proceed through the wizard.
Allow Windows to search for the driver – do NOT specify a driver location
or file name.
Windows 8, 7, Server 2012, Server 2008-R2 – Windows no longer searches
removable media for drivers. Open Device Manager, where the Radcap will
be shown under Other Devices as a Multimedia Audio Controller. Right-click
on it, select Update Driver Software, then click on Browse my computer for
driver software and click on the Browse button to navigate to the driver’s
location. Click on Next to install the driver.
Windows may warn that the driver that it is installing has not been certified
by Microsoft, which is true. The driver is however digitally signed by Innes
Corporation to meet the requirements of 64-bit Windows Vista and later
systems. Click on Continue to complete the installation.
Antenna
The AM Radcap requires an external antenna to receive the stations. The
type of antenna needed depends on the signal levels in the area in which
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suited to a loop antenna than a whip antenna, although the latter can be
used. An amplified antenna may be needed in some situations.
As a guide, a whip antenna one metre in length at a distance of 10km from
a 5kW transmitter at 1MHz will produce a signal level of about 100uV into
the card’s 50 ohm input. A shielded loop antenna enclosing a one square
metre area under the same conditions will produce about 600uV and will
offer better immunity to local electrical noise.
A suitable shielded loop antenna is the Belar model LP-1.
While the card is fitted with an input protection diode, we strongly
recommend fitting an external lightning suppressor to minimise the risk of
damage to the card. If using an amplified antenna, ensure the maximum
input level (200mVp-p) is not exceeded.
3
Configuration 1
A utility called AmSpectrum is supplied on the driver CD. This displays the
RF spectrum from 500kHz to 1700kHz and may be useful in selecting the
best location for the antenna or resolving interference problems.
Fig 1-1: AM Spectrum 500-1700 kHz Screen
To run the program, insert the driver CD, click on Start – Run and type in
d:\ AM & FM Radcap AmSpectrum.exe where d: is the drive letter for the
CDROM drive.
While every effort has been made to shield the Radcap input from internal
PC noise, in some situations such interference may be experienced. Trying
different PCIe slots may help to minimise such interference. The use of PCIe
extender cards is not recommended because of the increased potential for
interference. Avoid placing the card in PCs fitted with high-performance
video cards as these can be very noisy.
Configuration
To change the configuration, open Device Manager, expand the Sound,
video and game controllers section, right-click on AM Radcap PCIe and
select Properties. The available options are under the Configuration tab.
Note that, due to a limitation in the current driver, the Hardware ID will
not display if any applications are using the Radcap API. Please close any
Radcap-related programs before changing the settings.
Fig 1-2: AM Radcap
PCIe Properties
The AM Radcap PCIe is factory-configured for 6, 12, 18, 24 or 32 stations,
but needs licensing on your PC hardware. For an additional charge, the
number of stations can be increased in the field by entering the appropriate
expansion key on this page. Contact Sonifex Ltd to obtain an expansion key,
quoting the card’s Hardware ID and the number of stations you require.
Windows XP and Server 2003 limit the total number of audio input devices
4
1 Configuration
Fig 1-3: Radcap Monitor Screen
to 32. Please be aware of this limit, particularly if there are other audio
input devices present in the PC. There is no device limit in Vista, Windows
7, 8, Server 2008, Server 2008-R2 or Server 2012.
The AM Radcap card can be configured to produce a separate audio stream
for each station (single mode), or alternatively to pair stations together as
the left and right sides of a 2-channel audio stream (paired mode). Which
mode is best will depend on the application software being used.
The receiver bandwidth can be set to wide (default) or narrow. The narrow
setting restricts the audio response to about 3kHz, which may be useful in
noisy environments.
Once the configuration has changed it may take up to a minute for
Windows to reconfigure itself – be patient, it hasn’t crashed!
Setting Station Frequencies
A utility program called Tuner is supplied on the driver disc (this replaces
the earlier AmTune utility). This can be used to set the frequency of each
station and also to monitor each station through the PC’s standard sound
card or motherboard sound port.
To run the program, insert the driver CD, click on Start – Run and type in
d:\AM & FM Radcap\Tuner.exe where d: is the drive letter for the CDROM
drive. To set the frequency of a station, click on the Set button for that
station, type in the frequency (in kHz) and click on OK. To monitor a station,
click on the Monitor button for that station. Note that there is a delay of
about one second in the audio heard via this monitor, due to the amount of
audio buffering used.
5
Configuration 1
The frequencies set are stored in the Windows Registry by the driver and
are automatically restored whenever the PC is started. It is not necessary to
re-run Tuner or to leave it running once the frequencies are set.
Alternatively, if you write your own software, there is a DLL supplied on
the driver disc that can be used for setting and retrieving the station
frequencies. Refer to Appendix A for details.
The Tuner program also provides relative signal strength indicator bars
which may be useful in adjusting antenna placement. These indicators don’t
take into account the action of the card’s front-end AGC, and so should
not be used as an absolute signal strength reference. The signal strength
indicator has an approximately logarithmic response.
Note also that the AM Radcap does not support AM Stereo, as the use of
this mode has largely gone out of favour, and so the Stereo indicators in the
Tuner program don’t operate on AM stations.
Recording
Any application that records from standard wave input devices can be used
to record the audio streams from the AM Radcap. The native sampling
rate of the card is 22.05kHz with 16 bit resolution and, all other things
being equal, this rate should be used. Other rates can be used as Windows
automatically provides a sampling rate converter, but this converter will
consume some CPU time.
Make sure that the recording software you are using allows you to select
the audio input devices. The Radcap virtual devices have names like “AM
Radcap Ch. 1” (or “AM Radcap Ch. 1/2” if stations are paired).
A recording level control, mute control and peak meter are provided for
each station (or pair of stations) through the devices’ mixer ports (peak
meters in Windows Vista and later can only be accessed through the mixer
API if the application is running in XP-SP2 compatibility mode, or by using
the new Core Audio API). The default level setting is 50%, and at this setting
100% modulation will produce a peak audio level 6dB below clipping.
Support
For all support matters, go to www.sonifex.co.uk and click on Technical
Support, then Software Downloads. Software and driver updates will be
made available from time to time and will be placed on this website.
6
2 Technical Specification
Operating Systems Supported
Platform: Windows XP, Server 2003, Vista, Server 2008,
Windows 7, Server 2008 R2, Windows 8, Server
2012 (32-bit and 64-bit versions)
Processor: 1GHz Pentium II or better
Memory: 128MB minimum (1GB for Vista and later
systems)
Bus: Single lane PCI Express v1.1
Other: Sound card or motherboard sound port for
monitoring
Specification
Tuning Range: 500kHz to 1710kHz in 1kHz steps
Sensitivity: 50uV for 40dB S/N
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Filter Attenuation: 82dB at 15kHz or more from centre frequency
Audio Bandwidth: 5kHz
Audio Distortion: <0.1%
Audio Sampling Rate: 22.05kHz (other rates supported via Windows
SRC)
Number of Stations: 6, 12, 18, 24 or 32
Equipment Type
PC-AM6 Radcap AM 6 - 6 channel AM PCIe Radio
Capture Card
PC-AM12 Radcap AM 12 - 12 channel AM PCIe Radio
Capture Card
PC-AM18 Radcap AM 18 - 18 channel AM PCIe Radio
Capture Card
PC-AM24 Radcap AM 24 - 24 channel AM PCIe Radio
Capture Card
PC-AM32 Radcap AM 32 - 32 channel AM PCIe Radio
Capture Card
PC-AMUP6 Radcap AM 6 Channel Upgrade
PC-AMUP8 Radcap AM 8 Channel Upgrade
Physical Specification
Dimensions (Raw): 14cm (L) x 12.5cm (H) x 2cm (D)
5.5” (L) x 4.9” (H) x 0.8” (D)
Dimensions (Boxed): 27cm (L) x 22.5cm (H) x 6cm (D)
10.6” (L) x 8.9” (H) x 2.4” (D)
Weight: Nett: 0.10kg Gross: 0.20kg
Nett: 0.2lbs Gross: 0.4lbs
Technical Specification For PC-AM6-32
7
Appendix A – Programming the PC-AM6-32 3
On the driver CD you will find Radcap.dll, Radcap.exp, Radcap.lib and
Radcap.h, which can be used to read and set the frequency of each station
or read the received signal strength indicator. The DLL exports the following
functions:
enum RadcapTunerType { RadcapAM, RadcapFM };
UINT __stdcall RadcapStationCount (
enum RadcapTunerType Mode);
Parameters
Mode
Specifies AM or FM tuners.
Return value
The return value is the number of stations available.
Comments
This function will fail if the monitor program (Tuner.exe) or the AM
spectral display program (AmSpectrum.exe) is running.
BOOL __stdcall RadcapGetID (
UINT DeviceID,
enum RadcapTunerType *pType,
int *pTunerID, BOOL *pPaired);
Parameters
DeviceID
waveIn device ID
pType
Pointer to RadcapTunerType variable to receive the returned
device type
pTunerID
Pointer to int variable to receive the returned Tuner ID number
pPaired
Pointer to BOOL variable to receive the returned tuner
configuration
Return value
If the function succeeds the return value is TRUE.
If the function fails, the return value is FALSE. To get extended error
information, call GetLastError ().
Comments
This function takes the Device ID number of a waveIn audio stream
and returns the tuner type, identifier and configuration information
for the corresponding tuner. If the audio stream does not correspond to
a Radcap tuner the function returns FALSE.
Appendix A – Programming the PC-AM6-32
3 Appendix A – Programming the PC-AM6-32
8
UINT __stdcall RadcapGetFrequency (
enum RadcapTunerType Mode,
int TunerID);
Parameters
Mode
Specifies AM or FM tuner.
TunerID
Index of the station to be read, beginning at zero for the first
station.
Return values
If the function succeeds the return value is the frequency in kilohertz.
If the function fails, the return value is zero. To get extended error
information, call GetLastError ().
Comments
This function will fail if the monitor program (Tuner.exe) or the spectral
display program (AmSpectrum.exe) is running.
UINT __stdcall RadcapSetFrequency (
enum RadcapTunerType Mode,
int TunerID,
UINT Kilohertz);
Parameters
Mode
Specifies AM or FM tuner.
TunerID
Index of the station to be set, beginning at zero for the first station.
Kilohertz
The frequency (in kilohertz) that the station is to be set to. For
AM, this must lie between 500 and 1700, and for FM this must lie
between 87500 and 108500.
Return value
If the function succeeds the return value is TRUE.
If the function fails, the return value is FALSE. To get extended error
information, call GetLastError ().
Comments
This function will fail if the monitor program (Tuner.exe) or the spectral
display program (AmSpectrum.exe) is running.
9
Appendix A – Programming the PC-AM6-32 3
UINT __stdcall RadcapGetRSSI (
enum RadcapTunerType Mode,
int TunerID);
Parameters
Mode
Specifies AM or FM tuner.
TunerID
Index of the station to be read, beginning at zero for the first
station.
Return value
If the function succeeds the return value is the received signal strength
indicator.
If the function fails, the return value is zero. To get extended error
information, call GetLastError ().
Comments
The received signal strength indicator is not available on the original
2-channel FM Radcap cards. This function will succeed with those cards
but will always return 0.
The received signal strength indicator is a relative indication only and
should not be taken as an absolute measurement of signal strength.
This function will fail if the monitor program (Tuner.exe) or spectrum
display program (AmSpectrum.exe) is running.
BOOL __stdcall RadcapGetStereo (
enum RadcapTunerType Mode,
int TunerID);
Parameters
Mode
Specifies AM or FM tuner.
TunerID
Index of the station to be read, beginning at zero for the first
station.
Return value
The return value is TRUE if the station is being received in stereo.
Comments
The stereo indicator is only available on the FM Radcap cards, and
then only if the card is configured for stereo reception. This function
will fail if the monitor program (Tuner.exe) or spectrum display program
(AmSpectrum.exe) is running.
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