SERVICE MANUAL
Document No
Date of Origin
Date of REV
51-L-DSR004
98-10-21
PAGE REV.
0
PAGE
45 /102
S-00-005(96.03.27)
REV.1
7-16.
MODEM
7-16-1.
The set will be considered
normal if the Frequency
Scan is realized
after the system initialization.
The set will be considered
bad if
it is stopped
during the initialization
process.
Initialization
process
take place even there is a problem
at the Modem part.
7-16-2.
In the normal setting
Check the tone/pulse
and dial when you hit command
'T9'.
If you do not detect the tone/pulse,
check the U300.53p
ring point
for the possible
occurrence
of pulse.
The pulse appears
at U306.11
and 13p during Ringing
detection.
200 nS /
2V div
- U17.1 signal wave form -
- U17.18 signal wave form -
500 nS /
2V div
10 uS /
2V div
- BSKYB_BYTECLKVAL
signal wave form -
- U17.19 signal wave form -
200 nS /
2V div
figure 7-15-2.
control
signal wave form
