Specifications

5/9/13 888-2857-001 6-15
WARNING: Disconnect primary power prior to servicing.
Section 6 Diagnostics
Platinum VAX-C Series
6.3.1 PA Faults
SYSTEM Foldback
active
Power fold back warning System LED orange. Power foldback = 0 Power foldback > 0
SYSTEM Temporary
Feature Key Installed
Test Feature enabled in
Feature Key. Feature Key
will last for 24 hours, when 24
hrs elapses, Invalid
Modulation Feature Fault will
be activated.
System LED orange. Test Feature disabled
in Feature Key
Test Feature enabled
in Feature Key.
SYSTEM Slave mode
when TCU not present
Micron System is in slave
mode and no TCU presence is
detected.
System LED orange. Micron System is in
Master Mode, or
system is in Slave
Mode and TCU
presence detected.
System is in Slave
Mode, and TCU
Present command not
asserted on Pin 19 of
the Top 25 pin
Connector on the
VAX-C.
This is a UAX/VAX
specific fault.
SYSTEM in Reduced
Power Mode
% of FWD Power Reference
setting < 100%
System LED orange. % of FWD Power
Reference = 100%
% of FWD Power
Reference setting <
100%
This is a UAX/VAX
specific fault.
Table 6-8 PA Faults
Fault Log Message Fault Description Front Panel LEDs
Nominal Value/
Scaling
Trip Level
RF Output Level exceeding
+6dBm
RF Output Level fault Drive Chain LED
red.
RF Output ADC
<=2125 (+6dBm)
RF Output ADC > 2125
(+6dBm)
Amp Ctrl Driver Current
Fault
Amp Controller Driver
Current Fault
Drive Chain LED
red.
200mA - 450mA < 175mA or > 500mA
Amp Ctrl PS Fault 45V Power Supply
Fault
Drive Chain LED
red.
43V - 47V > 40V
Amp Ctrl PA FET 1 Bias
Fault
50V Current 1 Fault Drive Chain LED
red.
25W Amp
: >= 300mA
50W Amp
: >= 425mA
25W Amp
: < 250mA
50W Amp
: < 375mA
Amp Ctrl PA FET 2 Bias
Fault
50V Current 2 Fault Drive Chain LED
red.
25W Amp
: >= 300mA
50W Amp
: >= 425mA
25W Amp
: < 250mA
50W Amp
< 375mA
Table 6-7 MCU & SYS Faults
Fault Log Message Fault Description Front Panel LEDs
Nominal Value/
Scaling
Trip Level