AMD AMD-3700 User manual

AMD Global Telemedicine, Inc.
73 Princeton Street North Chelmsford, MA 01863
978-937-9021 (phone) 978-937-5249 (fax)
AMD Global Telemedicine, Inc.
Installation and Operation Manual
AMD-3700
Telephonic Stethoscope

AMD-3700 Telephonic Stethoscope Installation and Operation Manual
April 28, 2007
Revision 0.0
Table of Contents:
I. Introduction and Overview .......................................................................................3
II. Installation................................................................................................................3
A. Power ...................................................................................................................3
B. Data Communications Channel............................................................................4
C. Mode Selection.....................................................................................................5
III. Operation..............................................................................................................5
A. TX Mode...............................................................................................................5
B. RX Mode ..............................................................................................................6
IV. Maintenance and Calibration................................................................................7
This product meets the safety requirements of IEC 60601-1-1 for Type BF protection using a medical
grade power supply providing 9 vdc - 12 vdc at a maximum of 600 mA.
Vdc: Type BF applied part:
This product may be used in continuous operation.
This product is not suitable for use in the presence of a flammable anesthetic mixture with air or with
continuous oxygen or nitrous oxide.
This product complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
1. This device may not cause harmful interference, and
2. This device must accept any interference received, including interference that may cause undesirable
operation.
Normal use for this product is at an ambient temperature range of +10°to +40°C, a relative humidity
range of 30% to 75%, an atmospheric pressure range of 700 hPa to 1,065 hPa. It may be transported
and stored at temperatures from 0°C to 50°C.
For questions or comments, contact RNK Products, Inc., 12700 Diamond Drive, Burnsville, MN 55337
AMD Global Telemedicine, Inc.
73 Princeton Street North Chelmsford, MA 01863
978-937-9021 (phone) 978-937-5249 (fax)
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I. Introduction and Overview
The AMD-3700 Telephonic Stethoscope provides high quality remote auscultation with
a number of valuable and unique features.
•Low bandwidth while achieving quality auscultation. The AMD-3700 connects to
the system Data Channel via an RS232 interface operating at 19.2 Kb/s.
•Same model can be configured for Transmit operation or Receive operation.
•Plugging in the Chest Piece Assembly automatically puts the unit into Transmit
Mode and illuminates the TX Mode light.
•In Transmit Mode, the same auscultation sounds that are sent to the remote
AMD-3700 unit are also presented at the Headset jack for local monitoring.
•Leaving the Chest Piece input jack empty automatically puts the unit into Receive
Mode and illuminates the RX light.
•Volume control for adjusting the sound level delivered to the Headset jack. The
Volume control works in Receive Mode for sounds received from a remote AMD-
3700 unit or in Transmit Mode for monitoring sounds generated from the Chest
Piece Assembly plugged into that local unit.
•B/D Switch for an enhanced Bell/Diaphragm selection. The Bell (B) position cuts
off the high end at 250 Hz and boosts the low frequencies below 100 Hz for
enhanced heart auscultation. The Diaphragm (D) position slightly reduces the
very low frequency sounds and extends the high frequencies to 1,400 Hz. The
B/D Switch works in Receive Mode for sounds received from a remote AMD-
3700 unit or in Transmit Mode for monitoring sounds generated from the Chest
Piece Assembly plugged into that local unit.
The AMD-3700 Telephonic Stethoscope is for prescription use by medical care
professionals.
II. Installation
Installing the AMD-3700 Telephonic Stethoscope is as easy as applying power and
connecting the unit to a functional Data Channel.
A. Power
Power is provided to the AMD-3700 unit from a small, wall mount Power Supply. Plug
the Power Supply into a 115 vac wall outlet and insert the plug at the end of the power
cable into the jack at the left rear of the AMD-3700 unit.
If there is no Chest Piece Assembly plugged into the unit, the RX Mode light will be lit
and the TX Mode light will be OFF. If a Chest Piece Assembly is plugged into the unit,
then the TX Mode light will be lit and the RX Mode light will be OFF.
AMD Global Telemedicine, Inc.
73 Princeton Street North Chelmsford, MA 01863
978-937-9021 (phone) 978-937-5249 (fax)
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B. Data Communications Channel
The AMD-3700 Telephonic Stethoscope data interface is in asynchronous format with:
•RS232 electrical voltage levels
•19.2 Kb/s data rate.
•8-bits per character.
•No Parity.
•One Stop bit.
The Data Communication Channel interface must be set up to match this specification.
The AMD-3700 Telephonic Stethoscope functions as a DTE in terms of data
communications. If the Data Channel linking the transmitting AMD-3700 unit to the
receiving AMD-3700 unit is to be a modem, multiplexer or other similar DCE, then
(probably) a straight-through cable should be used to connect the AMD-3700 units to
the Data Channel interface. The AMD-3700 unit has a male DB-9 connector at the rear
of the unit. Typically, DCE equipment will have a female DB-9 connector for its data
communications interface. In that case, a female DB-9 to male DB-9 straight through
cable should be used. Sometimes DCE equipment will have a DB-25 connector for its
interface. In that case a DB-9 to DB-25 adapter may be used, or a cable with a female
DB-9 connector at one end and a male DB-25 connector at the other end.
If a PC is used for the Data Channel interface, then it is important to know that the
Serial Port (COM Port) of a PC is a DTE interface. In that case (or any situation where
the Data Channel equipment interface is DTE), a cross-over (or null modem) cable is
needed with a female DB-9 at both ends of the cable.
Before connecting the AMD-3700 units to the Data Channel (or if data communications
problems arise), it is a good idea to test the AMD-3700 units back-to-back to verify that
they are working properly by themselves. Apply power to both AMD-3700 units and
interconnect them with a male DB-9 to male DB-9 cross-over cable as shown below.
Crossover Cable
AMD-3700 AMD-3700
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73 Princeton Street North Chelmsford, MA 01863
978-937-9021 (phone) 978-937-5249 (fax)
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If sounds from the Chest Piece are heard at the headset, then the AMD-3700 units are
working properly and if problems arise in connecting the unit to the Data Channel, it is
appropriate to the concentrate on getting the signal through the Data Communications
Channel.
C. Mode Selection
If there is no Chest Piece Assembly plugged into the Chest Piece jack of the unit, then
the unit will be in Receive Mode and the RX Mode light will be illuminated. The TX
Mode light will be OFF.
If a Chest Piece Assembly is plugged into the Chest Piece jack of the unit, then the unit
will be in Transmit Mode and the TX Mode light will be illuminated. The RX Mode light
will be OFF.
III. Operation
For a normal remote auscultation exam, the AMD-3700 unit located with the patient is in
Transmit Mode and the AMD-3700 unit with the clinician is in the Receive Mode.
A. TX Mode
To operate as an auscultation transmitting unit the AMD-3700 must have a Chest Piece
Assembly plugged into the Chest Piece jack. That will put the unit into Transmit Mode
and illuminate the TX Mode light located just over the Chest Piece jack. Sounds from
the Chest Piece will be converted to digital signals and sent out over the RS232 data
interface.
In addition to transmitting the digital signals, the auscultation sounds from the Chest
Piece are looped back and presented at the local Headset jack. Thus, with an optional
Headset, the local user can listen to the same auscultation sounds that the listener at
the remote AMD-3700 (in Receive Mode) would hear.
Volume to the Headset can be increased by turning the Volume control clockwise.
Increasing the volume too high can cause distortion in the Headset and will also
increase the background noise. Start with the lowest volume necessary to hear the
sounds, then turn up the volume as needed to focus in on specific sounds.
The B/D Switch can be used in an auscultation exam similarly to a traditional
stethoscope. The Bell (B) position cuts off the high end at 250 Hz and boosts the low
frequencies below 100 Hz for enhanced heart auscultation. The Diaphragm (D) position
slightly reduces the very low frequency sounds and extends the high frequencies to
1,400 Hz.
Adjusting the Volume or changing the B/D Switch only affects what the local listener
hears and does not affect what the remote AMD-3700 listener would hear. The remote
AMD-3700 listener has independent Volume and B/D Switch controls.
AMD Global Telemedicine, Inc.
73 Princeton Street North Chelmsford, MA 01863
978-937-9021 (phone) 978-937-5249 (fax)
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B. RX Mode
Without a Chest Piece Assembly plugged into the Chest Piece jack of the TR-1, the unit
is automatically in the Receive Mode. With the Data Communications Channel
established and a Headset plugged into the Headset jack of the unit, the clinician is set
up to hear the stethoscope sounds from the remote AMD-3700 (in Transmit Mode).
Volume to the Headset can be increased by turning the Volume control clockwise.
Increasing the volume too high can cause distortion in the Headset and will also
increase the background noise. Start with the lowest volume necessary to hear the
sounds, then turn up the volume as needed to focus in on specific sounds.
The B/D Switch can be used in an auscultation exam similarly to a traditional
stethoscope. The Bell (B) position cuts off the high end at 250 Hz and boosts the low
frequency sounds below 100 Hz for enhanced heart auscultation. The Diaphragm (D)
position slightly reduces the very low frequencies and extends the high frequencies to
1,400 Hz.
IV. Maintenance and Calibration
There is no scheduled maintenance required for the AMD-3700 Telephonic
Stethoscope.
There is no calibration required for the AMD-3700 Telephonic Stethoscope.
If problems should arise with the AMD-3700 Telephonic Stethoscope, the table in the
following section may be used to trouble shoot the problem. Any failed units should be
returned for repair.
The AMD-3700 Telephonic Stethoscope may be cleaned with a damp cloth.
AMD Global Telemedicine, Inc.
73 Princeton Street North Chelmsford, MA 01863
978-937-9021 (phone) 978-937-5249 (fax)
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V. Trouble Shooting
Following is a chart to assist in trouble shooting problems which may arise during
installation or operation.
Symptoms Possible Causes and Solutions
Neither TX Mode nor RX Mode lights
come ON
Power plug not inserted all the way into the jack.
Make sure the power plug is fully seated.
No power at the wall outlet.
Try a lamp or other electrical item at that wall outlet to
determine if there is power.
If there is no power, fins a power outlet that does provide the
proper 115 vac.
If there is power at the wall outlet,
Try another AMD-3700 Power Supply.
If the AMD-3700 works, return the Power Supply for
repair/replacement.
If the AMD-3700 unit still does not work, return the AMD-3700
unit for repair/replacement.
Chest Piece is plugged in, but the RX
Mode light stays ON and the TX Mode
light is OFF.
The Chest Piece Assembly is not plugged in all the way.
Make sure Chest Piece Assembly plug is fully seated.
The AMD-3700 unit has failed.
Return the AMD-3700 unit for repair/replacement.
Nothing is plugged into Chest Piece
jack, but the TX Mode light is ON and
RX Mode light is OFF
The AMD-3700 unit has failed.
Return the AMD-3700 unit for repair/replacement
The Chest Piece is plugged in, the TX
Mode light is lit, but there is no sound
heard in the local Headset.
The Chest Piece Assembly is not plugged in all the way.
Make sure Chest Piece Assembly plug is fully seated.
The Headset is not plugged in all the way.
Make sure Headset plug is fully seated.
The Chest Piece Assembly and Headset are plugged into the
wrong jacks.
Make sure Chest Piece Assembly and Headset are plugged
into the proper jacks and are fully seated.
The Chest Piece is plugged in, the TX
Mode light is lit, sounds can be heard in
the local Headset, but there is no
sounds heard in the Headset of the
remote AMD-3700.
The remote AMD-3700 unit is not in Receive Mode.
Make sure that on the remote unit, the Headset is fully seated
in the Headset jack and nothing is plugged into the Chest Piece
jack. The RX Mode light should be ON.
Test the AMD-3700 units back-to-back with a cross-over cable.
If that test fails, then one of the two AMD-3700 units or the
cable is bad. Test with a third unit and new cable to determine
which has failed. Return the failed unit for repair/replacement.
If the AMD-3700 units test good back-to-back, trouble shoot the
Data Communications Channel.
See Section II. B. for proper Data Communication Channel
setup.
AMD Global Telemedicine, Inc.
73 Princeton Street North Chelmsford, MA 01863
978-937-9021 (phone) 978-937-5249 (fax)
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