PS Engineering PMA6000 Manuel d'installation télécharger pdf (Page 25)

PS Engineering

PMA6000 Series Audio Selector Panel and Intercom System

Installation Manual

200-066-0004 Appendix A Rev. 4, April 2002

Appendix A

External PTT Hook Up

Part of the installation includes the installation of PTT (Push To Talk) switches that allow the use of your

aircraft radio for communications transmissions.

There are three configurations that can be used, you must select the case that best fits your installation.

NOTE: Only the person who presses their PTT switch will be heard over the radio.

CASE I

The PTT is built into the pilot and copilot yokes

Simply install the plugs from the headset into the aircraft headphone jacks. Then use the yoke mounted

PTT to transmit. No other action is required.

CASE II

Built in PTT only on the pilot side only

This configuration requires a modified external PTT switch plugged into the copilot's mic jack. (See De-

tails Below) When the copilot's PTT is depressed, this activates an internal relay that switches the mic au-

dio to the aircraft radio from the pilot to the copilot.

Case III

No built in PTT switch at all.

Two built-in PTT must be installed, or two external, modified PTT switches will be required for both the

pilot and copilot. Modifications to the PTT are required. (See details below)

Push To Talk Modifications

When received from the manufacturer, an after-market PTT switch opens the mic audio path to the "ring"

connection of the PTT mic plug until the button is pressed. When the PTT is between the intercom and the

headset, the intercom function will not work unless the PTT switch is depressed. A simple modification

can be performed to allow proper intercom operation. NOTE: This mod does not alter normal operation.

Below are some examples of typical modifications. Contact PS Engineering or the PTT manufacturer for

more details if necessary.

Procedures For David Clark PTT

1. Unscrew the round black plastic cover from the jack.

2. Connect the joined black wires to the red wire.

3. Replace the round black plastic cover.

Procedures for Telex PT-200

1. Unscrew the round black plastic cover from the jack.

2. Cut the red wire in the middle of the wire.

3. Strip both ends of the insulation.

4. Solder the two ends to the ground lug to the PTT jack.

5. Replace the round black plastic cover.

Procedures for Telex PT-300

1. Unscrew the round black plastic cover from the plug jack.

2. Remove the heat shrink material from the joined black wires.

3. Solder these two wires to the lug that has a white wire already soldered to it.

4. Replace the round black plastic cover

1 2 ... 20 21 22 23 24 25 26 27 28 29 30 31

Commentaires sur ces manuels

Pas de commentaire

PS Engineering PMA6000 Manuel d'installation Page 25

Commentaires sur ces manuels

Produits connexes et manuels pour Récepteur PS Engineering PMA6000