Tait TM9100 Tune Up And Inspection

Tuneup TOPA-SV-024 Test Unit 36
August 2004 © Tait Electronics Ltd
TOP / TM9000 switch
This 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 positive
receive audio/SINAD output of the test unit (before the isolating transformer).
■ When set to TOP, the attenuation resistors are switched out.
■ When set to TM9000, the attenuation resistors are switched in
(attenuation 10:1).
Important Selecting the wrong switch position can result in incorrect
SINAD readings.
TOP Mod Audio / Off / Mic Audio switch
This 3-way toggle switch is used to switch between Mod Audio (Tait Orca
portables only), Mic Audio, and Off (no audio signal).
■ With the Tait Orca portables, this switch can be used for setting up dual
point modulation by applying modulation to different parts of the radio.
■ For normal transmit deviation tests (Tait Orca portables and TM9000),
this switch is set to Mic Audio.
Hook On / Hook Off switch
Important When using the test unit with Tait Orca portables, the
Hook On / Hook Off toggle switch must be set to
Hook Off. Tait Orca portables do not have a hookswitch,
and if the switch is set to Hook On, the Tait Orca portable
F1 function is activated.
This 2-way toggle switch is used to simulate the microphone hookswitch
opening (“hook off”) and closing (“hook on”). This is done by switching a
12kΩ resistor (R3) in or out of the MIC_PTT line.
■ When set to Hook Off, the 12kΩ resistor (R3) is switched out of the
MIC_PTT line. This simulates the microphone being removed from the
microphone clip.
■ When set to Hook On, a 12kΩ resistor (R3) is switched into the
MIC_PTT line. This simulates the microphone being placed on the
microphone clip.

Tait TM9100 Specifications

General

Brand	Tait
Model	TM9100
Category	Radio
Language	English