User Guide

PAMS
Technical Documentation
NME–3
JBD–2 User Guide
Page 8
Issue 1 10/99
Possible Audio Test Paths
There are six different audio modes. All audio modes are selectable with
the switch .
Set the switch into the upper position then change the JBD–2 into the
next mode. Switching to the next mode will be indicated by a shift of the
indicator LED one position to right. On the end of the LED line, there is a
wrap around with the next push up.
If you actuate the switch in its bottom position then the JBD–2 will change
into the previous audio mode. On the left end of the LED line, there is a
wrap around with the next push down.
SYSTEM Mode
SYSTEM Mode tests the normal mobile mode.
The audio signals (HSMICP/N & HSEARP/N) will be routed via a matrix to
the handset.
Additionally it will be connecting the following signals HFMICP and
SPKP/N to the handsfree accessories connectors.
— These are the default setting after the power–on.
HS
RS232
to PC
AIN
AOUT
HSEARP, HSEARN
HSMICP, HSMICN
HSEARP, HSEARN
HSMICP, HSMICN
MIC
SPK
Switch–Matrix
HS
RU
HFMICP, HFMICGND
SPKP, SPKN
RU
LINEP, LINEN
LINE
Figure 3. Routed audio path in Test mode
Test case
HS path
Tests the HS path from the RU.
The audio signals (HSMICP/N & HSEARP/N) are routed via switch matrix
to AIN and AOUT. They are converted with electronics from an
unbalanced to balanced signal and vice versa.