User Guide

PAMS
Technical Documentation
NME–3
JBD–2 User Guide
Page 13
Issue 1 10/99
Test Setup
RU
JBD–2
HS
TDC–4
PC
OSCI
Signal
Generator
AIN
AOUT
CH1
CH2
Measure Application
The ear path can be tested by injecting a sinusoidal signal to AIN then a
tone can be detected on the HS.
To test the microphone path, inject a tone in the microphone of HS and
measure the signal with oscilloscope at AOUT.
In addition, with an acoustic coupler between ear and microphone in HS
you can estimate the audio HS path with an oscilloscope.
Additional measure applications:
• Set backlight in the HS to 100%, 75% and OFF with MBUS
commands.
³WinTesla creates the MBUS commands.
³The result must be checked visually.
• Keyboard test
1st step: WinTesla sends MBUS commands to HS, which create
characters on HS display.
2nd step: Press the required character on the keyboard manual.
3rd step: WinTesla read the pressed character via MBUS and
compare it with the required character.
• SIM–connector test controlled about WinTesla with MBUS commands
VDA Tests only this must be converted by means of electronics.
The JBD–2 can check four VDA signals. The signals AMC and CRM are
checked permanently. The other signals IGNS and BLD generates the
box. Make these tests only in the audio modes 1–4 and system.
Note : It is important that the power supply is adjusted to 13.5V.