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TECHNISONIC INDUSTRIES LIMITED 

www.til.ca 

 

 

A790 Operating Instructions 

TiL 09RE409 Rev D

3-1 

 

SECTION 3 – CONFIGURATION MODE

 

3.1   INTRODUCTION 

The A790 can be put into a mode that allows four features of the unit to be configured, 
these are: 
 
1.

 

Configuring the unit for the backlight bus voltage used in the airframe. 

2.

 

Enabling or disabling a Power On Test of the PA system. 

3.

 

Setting the sidetone level to the operator's headset. 

4.

 

Download Siren and Trill sound files. 

 

NOTE:

 These options are typically configured once — items 1-3 at install time, item 4 at the 

factory. 
 
To 

enter

 the configuration mode: with the unit OFF press and hold the SIREN, TRILL and 

PLAY keys, turn on the A790, now release the keys. 
 
To 

exit

 configuration mode: either press the 'REC' button, or turn the power off. 

 
 

3.2   CONFIGURATION MODE OPERATION 

When in configuration mode, the front panel buttons are re-mapped to the various functions 
as described in the following sections. 

 
 

3.2.1   SIREN – Select the Backlight Voltage 

The MIC rotary switch has 3 positions: 
 
Pressing the SIREN button will toggle the configuration of the A790 backlight system to 
work with either 28 VDC or 5 VAC systems. 

The button is lit to indicate 28V configuration, and unlit to indicate 5V configuration. 
Factory default is: 28V. 

 
 

3.2.2  TRILL – Select the Amplifier Test 

Pressing the TRILL button toggles the amplifier test tone feature between enabled or 
disabled. When enabled the unit will produce a three second test tone each time the unit is 
powered up. As of this writing only the Powersonix Inc. PA systems are known to support 
this feature.  Ensure that you know if this feature is supported before enabling it. 
 
The button is lit when the test tone is enabled. Factory default is: disabled. 

 
 

3.2.3  PLAY – Set the Side-tone Level 

Pressing the PLAY button toggles between set or store the side-tone level. When the button 
is lit the unit is in side-tone set mode, the side-tone level can be set using the volume knob. 
When the button is pressed again (to unlit), the setting will be stored into memory. 

 
 

Содержание A790

Страница 1: ...ructions TiL Document No 09RE409 Revision D MARCH 2012 Technisonic Industries Limited 240 Traders Boulevard Mississauga Ontario L4Z 1W7 Tel 905 890 2113 Fax 905 890 5338 www til ca Copyright by Technisonic Industries Limited All rights reserved ...

Страница 2: ......

Страница 3: ...itle page changed to reflect new document format layout Correct other typos as found in TOC and Section 2 B Added edited by column in this page 2 4 ADDED configuration mode into section 2 Para 2 4 re sequenced as paragraph 2 5 28 Oct 2010 FM C 1 1 Para 1 2 Power Sonix AIR42 model number added in Rev A above should be PSAir22 not PSAIR42 D Sect 2 Para 2 4 moved to Sect 3 Sect 3 updated description ...

Страница 4: ...ii This page left intentionally blank ...

Страница 5: ...ications not expressly approved by Technisonic Industries could void the user s authority to operate the equipment WARRANTY INFORMATION The Model A790 is under warranty for one year from date of purchase Failed units caused by defective parts or workmanship should be returned to Technisonic Industries Limited 240 Traders Boulevard Mississauga Ontario L4Z 1W7 Tel 905 890 2113 Fax 905 890 5338 ...

Страница 6: ...ntly being delivered in the US and Canada as well as a number of single engine fixed wing aircraft The above referenced DO 160C test data is also on file and available from Technisonic to support approval requirements in airframes for which Technisonic does not possess an STC Approved aircraft types are listed in the attachments to the formal STC documents These STCs are the exclusive property of ...

Страница 7: ...3 OPERATION 2 3 SECTION 3 CONFIGURATION OPTIONS 3 1 INTRODUCTION 3 1 3 2 CONFIGURATION MODE OPERATION 3 1 3 2 1 SIREN Select the Backlight Voltage 3 1 3 2 2 TRILL Select the Amplifier Test 3 1 3 2 3 PLAY Set the Side tone Level 3 1 3 2 4 PA Select the wav File Loader 3 2 3 2 5 REC Exit Configuration Mode 3 2 LIST OF FIGURES FIGURE TITLE PAGE 2 1 A790 Operator s Controls and Indicators 2 1 2 2 Spec...

Страница 8: ...TECHNISONIC INDUSTRIES LIMITED www til ca A790 Operating Instructions TiL 09RE409 Rev D vi This page left intentionally blank ...

Страница 9: ...A790 is designed to work in conjunction with a high power public address system such as the Power Sonics Model PSAIR22 1 3 PURPOSE OF EQUIPMENT The A790 Loud Hailer Controller is designed to control an airborne public address system adding features such as pre recorded sounds and messages 1 4 MODEL VARIATION There is only one version of the Model A790 P N 081250 1 All units support both 5 and 28 v...

Страница 10: ...dBm nominal Audio output 2 1vrms 8 7dBm max 600Ω Physical Dimensions Approx 5 6 X 1 125 X 5 75 Weight Approx 13 4 oz 375 g Mounting Panel Mount via Dzus fasteners Operating Temperature Range 30 C to 70 C Power Requirement Voltage Current 28 0 VDC 15 500 mA max Back Lighting 28 Volts or 5 Volts 2mA max Display Colour NVG Compatible Green TABLE 1 1 Model A790 General Characteristics ...

Страница 11: ...tallation 1 The user can use the PA system directly with the headset mic 2 A message can be pre recorded in the A790 to be played over the PA system 3 A siren or a trill sound can be played through the PA 4 An auxiliary input jack allows for an input from an external source such as an MP3 player to be routed to the PA system or to the A790 message recorder FIGURE 2 1 A790 Operator s Controls and I...

Страница 12: ...ion 1 Special FIGURE 2 3 Configuration 2 Standard 2 2 1 MIC ROTARY SWITCH The MIC rotary switch has 3 positions RADIO The radio position is only used in special configuration 1 and allows the user to operate radios and equipment through the aircraft audio panel PA Switching to the PA setting connects the mic and the PTT line to control the PA system This is the normal position of this switch when ...

Страница 13: ...ile this function is activated 2 2 7 REC Pressing this button once arms the message recorder causing the button to blink If the button is pressed again within 4 seconds audio from the auxiliary input will be recorded until the REC button is pressed a final time 2 2 8 ON OFF VOL The volume knob adjusts the volume level of the audio going to the PA system only and does not affect the sidetone level ...

Страница 14: ...YING AN EXTERNAL AUDIO SOURCE THROUGH THE PA Plug the external audio source MP3 Player Cell Phone Etc into the 1 8 jack on the A790 The input will accept either a mono or stereo plug Press the PA button Start the audio source Adjust volume as necessary Press the PA button again when finished 2 3 6 RECORDING A MESSAGE FROM AN EXTERNAL SOURCE Plug the external audio source into the 1 8 jack on the A...

Страница 15: ...d in the following sections 3 2 1 SIREN Select the Backlight Voltage The MIC rotary switch has 3 positions Pressing the SIREN button will toggle the configuration of the A790 backlight system to work with either 28 VDC or 5 VAC systems The button is lit to indicate 28V configuration and unlit to indicate 5V configuration Factory default is 28V 3 2 2 TRILL Select the Amplifier Test Pressing the TRI...

Страница 16: ...unctions of the wave file loader are controlled via an externally connected computer No harm will occur if you accidentally invoke this function to exit this feature simply power off the unit and start again The button is lit when the wav file loader is running 3 2 5 REC Exit Configuration Mode Pressing the REC button will exit the configuration mode NOTE If you configured Amp Test Enabled it will...

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