Garmin APOLLO GX SERIES Service Manual

Contents

Garmin AT Rev --7-44 GX Service Manual © 2004 Garmin AT2. Receiver Tests Using the HP8920 Test SetHeadset Output LevelStep General Instruction Specific Instructions Expected Results1 Set all testequipment asspecified in TestEquipment Setup onpage 7-17.2 Sig. Gen. Mod Lvl.To 85%.Amplitude to 1000μV.On the HP8920:1. Set AFGen1 to AM 85%.2. Set AMPLITUDE to 1000μV.3. Set Ext. Load R 100 ohms.4. Set the Comm radioHDPHONE Lvl to 000.3 Move test cable. On the test box connect theHP8920 audio in cable to HDPH4 Adjust volumecontrol on Commradio for 0.280 W.On the Comm radio, adjust thevolume control until the AC Levelreads 0.280 watts.≥0.280 watts output into 100ohm load (mounted in testfixture) at a volume level from 0to 280 mW.Speaker Audio LevelStep General Instruction Specific Instructions Expected Results1 Set all testequipment asspecified in TestEquipment Setup onpage 7-17.2 Sig. Gen. Mod Lvl.To 85%.Amplitude to 1000μV.On the HP8920:1. Set AFGen1 to AM 85%.2. Set AMPLITUDE to 1000μV.3. Set Ext. Load R 4 ohms.3 Move test cable. On the test box, connect theHP8920 audio in cable to SPKROUT.4 Adjust volumecontrol on Commradio for 12 W.On the Comm radio, adjust thevolume control until the AC Levelreads 12 watts.≥12 watts output into 4 ohmload (mounted in test fixture) ata volume level from 0 to 12watts.