Tait TM8200 Installation And Operation Manual

Also see for TM8200 mobiles: Service manual Installation guide Installation guide Accessories manual Protocol manual

Contents

Tait TM8200 Installation And Operation Manual Manual pdf 26 page image

Tuneup TOPA-SV-024 Test Unit 26August 2004 © Tait Electronics Ltd2.2 OperationThis section explains the function of the TOPA-SV-024 test unit controls.The procedure for using the test unit is described in the section of theTM8200 Service Manual covering test equipment.2.2.1 TOP / TM8000 switchThis 2-way toggle switch is used to switch attenuation resistors (R4, R5, R6)in and out of the line from the radio’s positive speaker output to the positivereceive audio/SINAD output of the test unit (before the isolating transformer).■ When set to TOP, the attenuation resistors are switched out.■ When set to TM8000, the attenuation resistors are switched in(attenuation 10:1).Important Selecting the wrong switch position can result in incorrectSINAD readings.2.2.2 TOP Mod Audio / Off / Mic Audio switchThis 3-way toggle switch is used to switch between Mod Audio (Tait Orcaportables only), Mic Audio, and Off (no audio signal).■ With the Tait Orca portables, this switch can be used for setting up dualpoint modulation by applying modulation to different parts of the radio.■ For normal transmit deviation tests (Tait Orca portables and TM8200),this switch is set to Mic Audio.2.2.3 Hook On / Hook Off switchImportant When using the test unit with Tait Orca portables, theHook On / Hook Off toggle switch must be set toHook Off. Tait Orca portables do not have a hookswitch,and if the switch is set to Hook On, the Tait Orca portableF1 function is activated.This 2-way toggle switch is used to simulate the microphone hookswitchopening (“hook off”) and closing (“hook on”). This is done by switching a12kΩ resistor (R3) in or out of the MIC_PTT line.■ When set to Hook Off, the 12 kΩ resistor (R3) is switched out of theMIC_PTT line. This simulates the microphone being removed from themicrophone clip.■ When set to Hook On, a 12kΩ resistor (R3) is switched into theMIC_PTT line. This simulates the microphone being placed on themicrophone clip.