Service Manual
371
6802800U74-AN
Chapter 13: MTS Troubleshooting
Alarm ID
Descrip-
tion
configura-
tion param-
eters may
be corrupt-
ed.
Recovery
Action
in the NVM
memory.
Clear Ac-
tion
is un-
changed.
Notes
values. To en-
sure that the pa-
rameters can be
restored man-
ually to the earli-
er backed up
values.
• ALM_BRC_16_8MHZ_FAI
L_ALM
• ALM_BRC_16_8MHZ_FAI
L
The
16.8MHz
reference
failure - this
alarm origi-
nates from
the VCXO
and it is re-
ported by
the interrupt
(Host
IRQ4).
BRC is de-
keyed by the
software.
The alarm is
cleared only
after reset-
ting BRC.
The alarm may
be reported be-
cause of the
BRC hardware
failure.
ALM_RX_LO1_LOCK Receiver
synthesizer
lock detect
failure.
Receiver is
disabled by
the software
- BRC is un-
able to re-
ceive.
If the alarm
condition
disappears
then Receiv-
er is re-ena-
bled by the
software.
The alarm may
be reported be-
cause of the
BRC hardware
failure or be-
cause RX VCO
is not properly
tuned (BCD
NVM parame-
ters configura-
tion).
ALM_RX_SYNTH_LD_FAIL Reported when ALM_RX_LO1_LOCK is set and
ALM_BRC_16_8MHZ_FAIL_ALM is cleared
• ALM_RX_LO1_SL
• ALM_RX_SYNTH_SL_FAI
L
• ALM_RX_VCO_MON_FA
ULT
• ALM_RX_VCO_MON_FAI
L
Receiver
synthesizer
steering line
failure.
Receiver
VCO moni-
toring fail-
ure.
Receiver is
disabled by
the software
- BRC is un-
able to re-
ceive.
Receiver is
disabled by
the software
- BRC is un-
able to re-
ceive.
If the alarm
condition
disappears
then Receiv-
er is re-ena-
bled by the
software.
If the alarm
condition
disappears
then Receiv-
er is re-ena-
bled by the
software.
The alarm may
be reported be-
cause of the
BRC hardware
failure or be-
cause RX VCO
is not properly
tuned (BCD
NVM parame-
ters configura-
tion).
Alarm for BR-
Arch-1 only.
The alarm may
be reported be-
cause of the
BRC hardware
failure or config-