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PMA7000B--
Flying Never Sounded So Good!™
PMA7000B
Series
Series
Audio Selector Panel
Marker Beacon Receiver
and
Stereo Intercom System
Pilot’s Guide
Pilot’s Guide
And
And
Operation Manual
Operation Manual
Patent No. 5,903,277 & 6,160,496
FAA-Approved TSO C50c, C35d
JAA-Approved JTSO 2C35d, C50c
202-780-0001 Revision 1 May 2002
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1 OPERATION
MARKER MODE
RECEIVE AUDIO SELECTORS
GENERAL INFORMATION
1.1 SCOPE
This section provides detailed operating instructions for the PS Engineering
PMA7000B Audio Selector Panel/Intercom Systems. Please read it carefully before using the equipment so that you can take full advantage of its
capabilities.
This chapter is divided into four sections covering the basic operating areas
of the PMA7000B systems. They are Audio Selector, Transceiver Selection, Intercom, and Marker Beacon Receiver.
MARKER INDICATOR LAMPS
IINTERCOM MODE
PILOT & COPILOT VOLUME (INNER)
PASS VOLUME (OUTER)
1.2 Power Switch (EMG-Fail Safe Operation)
Unit power is turned on and off by pushing the volume knob. In the OFF or
"EMG" position, the pilot is connected directly to Com 1. This allows communication capability regardless of unit condition. Any time power is removed or turned OFF, the audio selector will be placed in the fail-safe mode.
The power switch also controls the audio selector panel functions, intercom,
and marker beacon receiver.
TRANSMIT SELECTORS
PMA7000B controls
2
CREW ICS
CD MUTE CONTROL
SPEAKER CONTROL
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1.3 Microphone (XMT) Selection (All models)
There are six pushbuttons associated with the communications transceivers.
The lower buttons control which transceiver is selected for transmit.
The PMA7000B gives priority to the pilot’s PTT. If the copilot it transmitting, and the pilot presses his PTT, the pilot’s microphone will be heard
over the selected com transmitter.
The PMA7000B-Series has an automatic selector mode. Audio from the
selected transceiver is automatically heard in the headsets and speaker (if
selected). You can check this function by switching from COM 1 to COM 2
and watch the selected
audio light on the selector change from COM 1
to COM 2. This ensures
the pilot will always hear
the audio from the transceiver he is transmitting
on.
When switching from COM 1 to COM 2, while COM 2 audio had been selected, Com 1 audio will continue to be heard. This eliminates the pilot having to switch Com 1 audio back on, if desired.
When switching from COM 1 to COM 2 while Com 2 has NOT been selected, Com 1 audio will be switched off. In essence, switching the mic selector will not effect the selection of Com receiver audio.
When the duplex, or TELEPHONE mode is implemented, Com 3 becomes
the “TEL” position . This is the pilot’s “hook” switch, when the system is
interfaced to an appropriate approved telecommunication system, such as
the AirCell system. Selecting Com 3 places the pilot microphone and headphones on the cellphone. The pilot PTT will switch the pilot mic to the
other selected com transceiver, and allow continued aircraft communications as well.
The copilot will also be able to transmit with his PTT as well.
NOTE: Selecting COM 3 –TEL– mode will disable pilot and copilot inter-
com, as the intercom circuit is transferred to the telephone use.
RCV
XMT
1.3.1 Swap Mode (Switch from Com 1 to Com 2 remotely)
With a yoke mounted, momentary switch, the pilot can change from the current Com transceiver (Com 1 or 2) to the other by depressing this switch.
To cancel "Swap Mode," the pilot may either press the yoke mounted
switch again, or select a different Com with the XMT buttons.
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1.4 Audio Selector (All models)
Receiver audio is selected through seven momentary, push-button, backlit
switches. You will always hear the audio from the transceiver that is selected for transmit.
The users can identify which receivers are selected by noting which of the
green switch LEDs are illuminated. Push buttons labeled Nav 1, Nav 2,
MKR (Marker), AUX (auxiliary), and SPR (Speaker) are "momentary type
switches. When one of these buttons is pressed, it's active, and the LED will
illuminate. Press the switch again and it be in the "off" position and remove
that receiver from the audio.
If the aircraft is equipped with a DME or ADF, these audio sources can be
selected with the AUX button.
1.4.1 Speaker Amplifier
The "SPR" in the push-button section stands for speaker. This switch will
place all selected audio on the cockpit speaker when this
switch is activated. NOTE: Except for the unswitched
audio, the speaker amplifier is not active in the "Split
Mode."
Unswitched audio, (autopilot disconnect, altimeter warning, etc.) will come through the speaker regardless of the
speaker button position.
1.4.1.1 Public Address Function
To access PA function, an external switch must be installed, and activated.
This places the pilot microphone on the speaker output when the PTT is
pushed. The copilot can continue to use the selected com radio.
We recommend that the switch transfer the audio from the cockpit speaker
to a cabin speaker for public address. This will prevent feedback.
1.4.2 Key “Click”
The PMA7000B is equipped with a “click” function that provides an aural
feedback to the user in addition to the tactile button push. This sound can
be enabled or disabled by simultaneously holding the COM 1 and COM 2
buttons in for at least 5 seconds. Any person hearing the radios will also
hear the key click.
Allow at least 20 seconds between turning the key click on and off.
1.5 Split Mode
The split mode can be activated at any time by pressing the desired combination of XMT buttons. For instance, to activate a Com 1/Com 2 split, press
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Com 1 and Com 2 transmit buttons at the same time. This places the pilot
on Com 1 and the Copilot on Com 2.
Split mode for Com 3, in normal (not TEL/Duplex) is possible with pilot on
Com 1, copilot on Com 2 or 3
Pilot on Com 2 or Com 3 and Copilot on Com 1 is not possible.
Note:
Due to the nature of VHF communications signals, and
the size constraints in general aviation aircraft, it is probable that there will be some bleed-over in the Split mode,
particularly on adjacent frequencies.
PS Engineering makes no warranty about the suitability
of Split Mode in all aircraft conditions.
Note: Split Mode does not turn off other (Nav, ADF, etc.) selected audio to pilot.
However, the copilot will only hear the selected communications receiver.
1.5.1 Split Mode ICS
In split mode, the pilot and copilot are usually isolated from each other on
the intercom while simultaneously using their respective radios. Depressing
the ICS button in Split Mode will activate VOX intercom between the pilot
and copilot positions. This permits intercommunication when desired between the crew. Pressing the ICS button again disables this crew intercom
function.
1.6 Intercom Operation
1.6.1 IntelliVox® VOX-Squelch
No adjustment of the IntelliVox® squelch control is necessary. There is no
field adjustment. Through individual signal processors, the ambient noise
appearing in all six microphones is constantly being sampled. Non-voice
signals are blocked. When someone speaks, only their microphone circuit
opens, placing their voice on the intercom.
The system is designed to block continuous tones, therefore people humming or whistling in monotone may be blocked after a few moments.
For consistent performance, any headset microphone must be
placed within ¼-inch of your lips, preferably against them. (ref:
RTCA/DO-214, 1.3.1.1 (a)).
It is also a good idea to keep the microphone out of a direct
wind path. Moving your head through a vent air stream may
cause the IntelliVox® to open momentarily. This is normal.
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The IntelliVox® is designed to work with normal aircraft cabin
noise levels (70 dB and above). It loves airplane noise! Therefore, it may not recognize speech and clip syllables in a quiet
cabin, such as in the hangar, or without the engine running.
This is normal.
For optimum microphone performance, PS Engineering recommends installation of a Microphone Muff Kit from Oregon Aero (1-800-888-6910). This
will not only optimize VOX performance, but will improve the overall clarity of all your communications.
1.6.2 Intercom Volume Control
The intercom volume control for pilot and copilot is the smaller concentric
knob on the left side of the unit. This volume control knob adjusts the loudness of the intercom for the pilot and copilot only. It has no effect on selected radio levels, music input levels or passengers' volume level.
Adjust the radios and intercom volume for a comfortable listening level for
the pilot. Most general aviation headsets today have built-in volume controls; therefore, passenger volume can be adjusted at the headset. If desired,
passenger volume level can be adjusted by a screwdriver adjustment at the
top of the tray.
The outer knob is the passenger volume control. This volume control knob
adjusts the loudness of the intercom for the passengers only. It has no effect
on selected radio levels, music input levels or crew’s volume level.
1.6.2.1 Mono headsets in Stereo Installation
All passenger headsets are connected in parallel. Therefore, if a monaural
headset is plugged in to a PMA7000B Stereo installation, one channel will
be shorted. Although no damage to the unit will occur, all passengers will
lose one channel, unless they switch to the “MONO” mode on the headset.
PS Engineering modifies headsets to add stereo capability, using highfidelity speakers. Contact factory for details.
1.6.3 Intercom Modes
The lower switch on the left side is a 3-position mode switch that allows the
pilot to tailor the intercom function to best meet the current cockpit situation. The description of the intercom mode function is valid only when the
unit is not in the "Split" mode. Then, the pilot and copilot intercom is controlled with the ICS button.
ISO: (Up Position): The pilot is isolated from the intercom and is connected
only to the aircraft radio system. He will hear the aircraft radio reception
(and sidetone during radio transmissions). Copilot will hear passengers’
intercom and Entertainment 1, while passengers will hear copilot intercom
and Entertainment 2. Neither will hear aircraft radio receptions or pilot
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transmissions.
ALL: (Middle Position): All parties will hear the aircraft radio and inter-
com. Crew will hear Entertainment 1, passengers will hear Entertainment 2.
During any radio or intercom communications, the music volume automatically decreases. The music volume increases gradually back to the original
level after communications have been completed.
CREW (Down Position): Pilot and copilot are connected on
one intercom channel and have exclusive access to the aircraft
radios. They may also listen to Entertainment 1. Passengers
can continue to communicate with themselves without interrupting the Crew and also may listen to Entertainment 2.
Anytime the PMA7000B is in either the COM 1/COM 2, COM
2/COM 1 ("Split Mode"), the pilot and copilot intercom is
controlled with the ICS button. The passengers will maintain
intercommunications, but never hear aircraft radios.
Mode Pilot Hears Copilot
ISO A/C Radios
Pilot Side-
tone
(during
radio trans-
mission)
Entertain-
ment 1 is
Muted
ALL Radios
Copilot
Passengers
CD Music
CREW Radios
Copilot
CD Music
Hears
Passen-
gers
Copilot
Music
Input 1
(CD)
Radios
Pilot
Passen-
gers
CD Music
Radios
Pilot
CD Music
Passen-
gers Hear
Copilot
Passen-
gers
Music 2
Radios
Pilot
Copilot
Passen-
gers
Music 2
Passen-
gers
Music 2
Telephone Comments
Phone Booth”
mode
Pilot has exclu-
sive use of the
telephone
All have access
to phone through
Hook Switch.
Pilot access
through TEL
switch.
All hear tele-
phone audio if off
hook.
Pilot and copi-
lot don’t have
phone access
unless in TEL
mode. Pas-
This mode allows the pilot to
communicate without the others
being bothered by the conversa-
tions. Copilot and passengers
can continue to communicate
and listen to music
This mode allows all on
board to hear radio recep-
tion as well as communicate on the intercom. Music
and intercom is muted dur-
ing intercom and radio com-
munications
This mode allows the pilot
and copilot to concentrate
on flying while the passen-
gers can communicate
amongst themselves
sengers have
phone through
Hook Switch
Passengers
hear phone
audio
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1.6.4 Entertainment Input
The audio selector panel has provisions for two separate entertainment input devices. Music 1 feeds the pilot and copilot positions, music 2 feeds the
passenger positions. They operate independently in the PMA7000B.
While in the ISO (Isolate) mode, the copilot will hear Entertainment 1 while
the four passengers will hear Entertainment #2. The pilot will hear entertainment 1, at a muted level. In normal operation, whenever a person
speaks, or if the aircraft radio becomes active, the music will automatically
mute and then will gradually return to the original listening level when the
intercom or radio conversation ceases.
When in the ALL mode, pilot and copilot will hear Entertainment 1 input
while all passengers will hear the Entertainment 2 source. While in the
CREW mode, pilot and copilot will hear entertainment input #1 while the
passengers may listen to entertainment input #2.
It is also possible to use a single input device for both entertainment inputs.
However, we suggest that a switch (DPDT) be installed between the entertainment device and entertainment input #1. This will allow the pilot to direct the music as desired.
1.6.4.1 Soft Mute and Soft Mute inhibit
The Soft Mute feature assures that the aircraft radio transmissions will not
be missed due to entertainment playing. When there is radio reception or
intercom conversation, the music level is dropped to a low, or background
level. When the radio or intercom traffic ceases, the level gradually returns
to normal.
The front panel ICS switch controls muting of entertainment source #1 (for
pilot and copilot). Pushing this button places the ICS in
Karaoke (or sing along) mode, which inhibits the soft mute
feature. This allows the music to continue uninterrupted by
intercom or radio traffic when cockpit workload is appropriate. Pushing the button again will release the mute inhibit
function.
The passenger music, source #2, can be placed in the Karaoke mode if a
remote switch is installed in the aircraft.
1.7 Telephone Mode
The Com 3 mode can serve as a full duplex interface for telephone systems
if the installation is correctly configured. When interfaced with an approved
airborne telecommunications system, the PMA7000B can serve as a audio
control and distribution center. Each position has a "hook switch." The pilot's hook switch is the "Com 3" button on the audio panel, the others are
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discrete switches mounted adjacent to the headset jacks. When Com 3 is
active in the duplex mode, the TX button will blink about twice as fast as
the normal transmit rate.
When the intercom is in ALL mode, the pilot can speak on the phone only
if the Com 3 is selected for transmit (Com 3 Xmt button activated). All
intercom positions will hear the telephone conversation. If any passenger
places his or her switch into the “off-hook” position all passengers will also
be heard on the phone. All hear selected audio. Com 1 audio is automatically heard in the headsets. The pilot and copilot will have transmit capability on the other selected transceiver Com 1 or 2, simply by using their respective PTT switch.
In CREW mode, the pilot and copilot may use the telephone, with their
respective hook switch (the pilot selects Com 3 on the Xmt selector). Any
passenger who places their switch into the off-hook position will also have
access to the phone, and all four passengers will hear the conversation.
In ISO intercom mode, when the PMA7000B is in the Com 3 mode, the
pilot position is in the "Phone Booth." He will also have access to Com 1
or 2, and will transmit on that radio using the PTT. All selected audio is
provided. If any other passenger goes “off hook” they will hear the phone.
Note: Because the telephone uses an intercom circuit, all stations on
that circuit will lose intercom capability when the telephone is in use.
1.8 Marker Beacon
The optional Marker Beacon Receiver uses visual and audio indicators to
alert you when the aircraft passes over a 75 MHz transmitter.
The Blue lamp, labeled "O," is the Outer Marker lamp and has an associated 400-Hertz 'dash' tone. The lamp
and tone will be keyed at a rate of two
tones/flashes per second when the aircraft is in the range of the Outer
Marker Beacon.
The Amber lamp, labeled "M," is the Middle Marker lamp and is coupled
with a 1300-Hertz tone. It is keyed alternately with short 'dot' and long
'dash' bursts at 95 combinations per minute.
The White lamp, labeled "I," is the Inner marker and has a 3000-Hertz 'dot'
tone. The lamp and tone will be keyed at a rate of six times per second.
The audio from the Marker Beacon Receiver can be heard by selecting the
"MKR" push-button switch. To adjust the volume level, there is a service
adjustment located on the top of the unit.
A three-position switch is used to set the receiver sensitivity and to test the
indicator lamps. Use "HI" sensitivity initially. This allows you to hear the
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outer marker beacon about a mile out. Then select the “LO” sensitivity to
give you a more accurate location of the Outer Marker. The momentary
down switch position is marker test, labeled "T/M" and illuminates all three
lamps simultaneously to assure the lamps (internal and external) are in
working order. TST does not activate MM sense output.
Pressing the marker mode select down (to “T/M”) will cause the marker
audio to mute for that beacon. The next beacon received will re-activate the
audio.
1.9 Internal Recorder System (Option 1 only)
The Intercom Recording System (referred to here as the IRS) is a digital
recording system allowing automatic storage and playback of aircraft radio
traffic.
Operating as a continuous loop recorder, (first message received will be the
last heard), the recorder has one minute of recording time or up to 16 messages. With its own built in VOX circuit, there are no buttons to press to
start recording. The system automatically begins to record the instant the
radio becomes active. Only aircraft radio audio in pilots headset is recorded
and only the pilot will hear the playback audio.
1.9.1 Operation
Recording is automatic; there is no action required by the pilot. To play
back the last recorded message, simply press the momentary switch associated with the IRS. Each additional press of the button will play the preceding recorded message. You must wait for the message to finish playing before accessing the prior message.
To cancel the playback, press and hold the playback button for two seconds. The next time the button is pressed, the next earlier message will be
heard.
1.10 Audio Messaging system (Option 1 only)
When this option is installed, the PMA7000B contains six stored messages.
An outside annunciation, such as an Electronics International engine gage
system triggers these messages. When there is an announcement, it will be
repeated every two seconds until the remote- mounted ACK button is
pushed. This stops the played annunciation, until the next announcement is
required (the next falling edge).
1.10.1 Concurrent Messages
When a recorded message or audio annunciation is playing, the other audio
source is momentarily inhibited. For instance, if an IRS message is being
played, the audio annunciation will not begin until the IRS message is finished. Conversely, the IRS recording cannot be played as long as there is an
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aural alert being played. There is no recording made if playing a recording
or annunciation.
Warranty and Service
2.1 Warranty
In order for the factory warranty to be valid, the installations in a certified aircraft
must be accomplished by an FAA-(or other ICAO agency) certified avionics shop
and authorized PS Engineering dealer. If the unit is being installed by a noncertified individual in an experimental aircraft, a factory-made intercom harness
must be used for the warranty to be valid.
PS Engineering, Inc. warrants this product to be free from defect in material and
workmanship for a period of three (3) years from the date of installation as recorded
in aircraft logbook and/or on FAA Form 337. During the first twelve (12) months
of the three-year warranty period, PS Engineering, Inc., at its option, will send a
replacement unit at our expense if the unit should be determined to be defective
after consultation with a factory technician. For the remaining twenty-four (24)
months of the three-year warranty period, the unit must be returned to PS Engineering, Inc., or an authorized warranty service facility, for no-cost repair.
All transportation charges for returning the defective units are the responsibility of
the purchaser. All domestic transportation charges for returning the exchange or
repaired unit to the purchaser will be borne by PS Engineering, Inc. The risk of loss
or damage to the product is borne by the party making the shipment, unless the purchaser requests a specific method of shipment. In this case, the purchaser assumes
the risk of loss.
This warranty is not transferable. Any implied warranties expire at the expiration
date of this warranty. PS Engineering SHALL NOT BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES. This warranty does not cover a defect
that has resulted from improper handling, storage or preservation, or unreasonable
use or maintenance as determined by us. This warranty is void if there is any attempt to dissemble this product without factory authorization. This warranty gives
you specific legal rights, and you may also have other rights, which may vary from
state to state. Some states do not allow the exclusion of limitation of incidental or
consequential damages, so the above limitation or exclusions may not apply to you.
All items repaired or replaced under this warranty are warranted for the remainder
of the original warranty period. PS Engineering, Inc. reserves the rights to make
modifications or improvements to the product without obligation to perform like
modifications or improvements to previously manufactured products.
2.2 Factory Service
The units are covered by a three-year limited warranty. See warranty information.
Call PS Engineering, Inc. at (865) 988-9800 before you return any unit. This will
allow the service technician to provide any other suggestions for identifying the
problem and recommend possible solutions.
After discussing the problem with the technician and you obtain a Return Authori-
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zation Number, ship product to:
Flying Never Sounded So Good!™
PS Engineering, Inc.
Attn: Service Department
9800 Martel Rd
Lenoir City, TN 37772
(865) 988-9800 FAX (865) 988-6619
Email: support@ps-engineering.com
NOTE: PS Engineering will not be responsible for any product returned to us by
US Mail, or in other than the original or UPS approved equivalent packaging.
Units without an RMA or detailed description of problem AND a contact phone
number will be refused.
PS Engineering, Inc. 2002 ©
Copyright Notice
Copyrighted information in this manual is subject to change without notice. PS Engineering
reserves the right to improve or change the products or contents of this manual, without
notification of any person or agency. The contents of this pilot’s guide may be downloaded,
stored and reprinted for personal use provided that this copyright information is included.
Commercial use is strictly prohibited. For further information contact the Publications Manager at PS Engineering, Inc., 9800 Martel Road, Lenoir City, TN 37772. Phone (865) 9889800
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