[ Home ] [ Up ] [ News ] [ LinAire Products Page ] [ Services ] [ Distributors ] [ Harness Use List ] [ Feedback ] [ Literature Request ]

Table of Contents

CONTACT
  INFORMATION:
  LinAire Engineering 
                                                       LinAire 
DISTRIBUTORS

  Search Web Site

INSTALLATION & OPERATION

2.11 The model LT 6 Test Panel measures 7” H X 19” W X 5.25” D. The panel is compatible with all standard relay racks and cabinets.

2.12 Power connections are made via four lug terminal strip located on the rear of the panel.

Terminal No. 1 DC 28 Volts

Terminal No. 2 DC 14 Volts

Terminal No. 3 AC 115 Volts 400Hz note: 50-400Hz required for the panel meter operation
                            If unit under test does not require 115VAC 400 Hz then 50-60Hz maybe connected.
Terminal No. 4  Power Ground

2.13   It is recommended that a minimum size of 14-gauge wire be used for the DC power and Ground connections to the panel from the power supply.

3.11 The ON/OFF switch, in the ON position, connects all input voltages to the harness connectors. The Panel Power lamp lights in the ON position.

The REMOTE ON/OFF switch turns ON the unit under test when remote operation is available.

The DC fuse is a 10 amp standard 3AG type and is provided for protection of the DC power.

The 115VAC fuse is a 1-amp standard 3AG type and is provided for protection of the 115VAC power.  The 115VAC power is primarily for panel meter power.

The LT 6 uses the same LinAire control heads as the LT 5, however, the LT 6 also provides for the connection of serial controllers for the units under test by optional cables from LinAire. See the harness note sheet for control head type.

The LT 6 uses a digital panel meter to monitor the DC voltage, RT current draw, IND current draw, audio RMS of the Speaker - COMM - AUX channels, Nav Dev / Flag outputs, GS Dev / Flag outputs and To-From Flag.

The LT 6 provides 0 to 5 1K-ohm-loads for the Navigation and Glide Slope deviation and flag circuits. A 200-ohm meter load is applied to the TO-FROM Flag.

MICROPHONE

MIKE JACK  For connection of a carbon microphone or powered microphone.

MIKE   NORM/TEST   switch in NORM position connects mike audio to LA connector pin 3 and to Mike Com/Intercom LT 6 panel switch then to LT panel P1 main connector.

MIKE KEY Line connects to LA connector pin 4 and Mike Com/Intercom LT 6 panel switch then to P1 main connector.

Microphone testing provided when Mike Norm/Test switch is in Test.

SPEAKER  output is connected as balanced line to P1 & LA connector.  The low side is grounded in cable when single ended output is required.

Panel speaker connects to speaker channel with SPKR/PHONE in SPKR.

Panel speaker connects to amplified phones with SPKR/PHONE in PHONE.

Test point jacks allow monitoring of Panel SPEAKER CHANNEL. Panel meter measures the Speaker  and Phone RMS voltage.

COMM PHONE / AUX  The Phone or low level COMM or AUX output is selected by the COM/AUX switch then routed through a Volume control pot to the Phone Jack.  If no headphone is plugged into the phone jack then the phone audio will be available at the LT 6 panel speaker when the Phone channel is selected. Test point jacks allow monitoring of low level COM and AUX audio outputs. Panel meter measures the COM and AUX audio RMS voltage.

INTERCOM  This signal inputs at the AUX audio if no NAV audio is available. If both intercom and NAV audio are available the location of the intercom input will be shown in the cable’s note sheet.

AUX AUDIOS  This input used for Nav audio, intercom audio, sidetone, or other aux audio outputs. If both intercom and NAV audio are available the location of the intercom input will be shown in the cable’s note sheet.

3.17 OBS Signals  The OBS signals can be applied to the panel in several ways: A precision track selector can be connected to P6 on the rear of the panel. An indicator can be connected via LinAire cable to the panel and then use the OBS signals from the indicator. It is also possible to patch in the OBS signals at the panel tip jacks.

4.00 DETAIL OF SWITCHES & TIP JACKS

14/28 VOLT switch  In the14 position it selects 14VDC to UUT.  In the 28 position it selects 28VDC to UUT.

REMOTE ON switch   In the ON position grounds the Remote On Line and turns on UUT.

KEY switch   In the ON position grounds the panel Mike Key Line.  Also provides ground to the Mike COM / I/COM switch and Mike jack key line P8-4

MIKE COM / I/COM switch   In the COM position it connects the panel mike key line to COM MIKE.  and connects panel mike audio to COM MIKE audio.  In the I/COM position it connects panel mike key line to Intercom Key and connects the panel mike audio to Intercom Mike audio.

MIKE NORM/TEST switch  In the NORM position it connects Mike Jack audio to panel mike line.  In the TEST position it connects Mike Jack audio to the mike audio input of the phone amplifier then to the panel speaker and phone jack.  This position is used to test microphones and headsets.

AUX/COM switch  In the AUX position it connects low level audio outputs to panel phone line.  In the COM position it connects low level Comm audio output to panel phone line. 

DISABLE/SQUELCH switch  In the DISABLE position it connects ground to the squelch disable line.  In the SQUELCH position it opens the line.

SPEAKER / MUTE / PHONES switch  In the SPEAKER position it connects the panel speaker HI and LO to the speaker channel and loads the speaker channel to 4 ohms.  The MUTE Center Off position disconnects the panel speaker and load.  And the PHONES position connects the panel amplified phones channel to the panel speaker.

METER switch

DC VOLT  Measures the DC volts applied to the LT 6 panel.

RT AMPS  Measures the current draw of the R/T Unit Under Test.

IND AMPS  Measures the current draw of the Indicator connected to the panel.

SPKR  Measures the RMS voltage on the Speaker Channel of the LT 6 panel.

COM  Measures the RMS voltage of the COM or Phone outputs of the UUT.

AUX  Measures the RMS voltage of the low level outputs of the UUT (sidetone, intercom and aux audio).

NAV FLAG  Measures the mV DC across the load of the Nav Flag lines.

NAV DEV Measures the mV DC across the load of the Nav Deviation lines.

GS FLAG Measures the mV DC across the load of the Glide Slope Flag lines.

GS DEV Measures the mV DC across the load of the Glide Slope Deviation lines.

TO FROM Measures the mV DC across the To From lines (200-ohm-load).

OFF Removes all input voltages from panel meter.

5V / 28V LAMPS switch  In the 5V LAMPS position it applies 5 volts DC to UUT lamps. In the 28V LAMPS position it applies 28 volts DC to UUT lamps for the 28 volt units and 14 volts DC for 14 volt units under test.

S1 switch  

S2 switch  The P1 and P2 position varies its function with the Unit Under Test. See cable note sheet for use.

TEST JACKS

4.20  LT 6 Panel Test Point Jacks

NAV LOC FLAG + and NAV LOC FLAG -  

NAV LOC DEV L and NAV LOC DEV R 

GS FLAG + and GS FLAG - 

GS DEV U and GS DEV D 

OBS H , OBS C , OBS A , OBS B 

OBS D , OBS E , OBS F , OBS G , OBS TO , OBS FROM

NUMBER 1 THRU 36 are assignment varies with the Unit Under Test.  See the cable note sheets for each unit.

  Avionics Test Equipment Panels and Cables for bench testing of Aircraft Radio, Navigation, Audio Controllers, Radar and more. Linaire Engineering Inc.
Last modified: June 15, 2004