Specifications

6-16 888-2857-001 5/9/13
WARNING: Disconnect primary power prior to servicing.
Section 6 Diagnostics
Platinum VAX-C Series
PA Thermal Shutdown PA Hardware Thermal
Shutdown Fault
Drive Chain LED
red.
< 80.0 C Approximately 86 C trip
point
PA Overvoltage Fault PA Overvoltage Fault Drive Chain LED
red.
43-47V 51V trip point
PA FET 1 Overcurrent Fault PA Overcurrent Fault
on FET 1
Drive Chain LED
red.
25W Amp
: < 2A
50W Amp
: < 5A
25W Amp
: 2A trip point
50W Amp
: 5A trip point
PA FET 2 Overcurrent Fault PA Overcurrent Fault
on FET 2
Drive Chain LED
red.
25W Amp
: < 2A
50W Amp
: < 5A
25W Amp
: 2A trip point
50W Amp
: 5A trip point
PA VSWR Fault PA VSWR Fault Drive Chain LED
red.
Nominal Range for
VSWR is scaled by F/
B Threshold user
setting, settable from
1-4%. This equates to
approximately a 1.2:1
to 1.5:1 VSWR range
10dB down from full power,
or approx a 2:1 VSWR
PA Temperature Fault S/W PA Temperature
fault
Drive Chain LED
red.
PA 1 and PA 2 Temp <
80.0 C
Fault declared when PA 1 or
PA 2 Temp >= 85.0 C. Fault
clears when both PA 1 and PA
2 Temperature <= 75.0 C
RF Input Level Low Fault RF Input Level Low
Fault
Drive Chain LED
red.
GFX
: -2dBm +/-1dBm
Cabinet Controller
:
0dBm +2/-3dBm
GFX
: RF Level In < -4dBm
Cabinet Controller:
RF Level In < -6dBm
Low RF Gain Fault RF Gain Low Fault Drive Chain LED
red.
During normal RF
ALC operations (TX
On, unmuted), PA
FWD PWR detector
should be >= 1000
Fault declared during normal
RF ALC operations if no
faults present on Amp
Control Board, and PA FWD
PWR Detector < 1000
Amp Ctrl Driver Current
Warning
Amp Controller Driver
Current Warning
Drive Chain LED
orange.
200mA - 450mA 175mA <= Driver Current <
200mA or 450 < Driver
Current <= 500mA
Amp Controller PS Warning 45V Power Supply
Warning
Drive Chain LED
orange.
43V - 47V 40V <= PS Voltage < 43V or
PS Voltage > 47V
Amp Controller PA FET 1
Bias Warning
50V Current 1 Warning Drive Chain LED
orange.
25W Amp
:
>= 300mA
50W Amp
:
>= 425mA
25W Amp
:
250mA <= Current < 300mA
50W Amp
:
375mA <= Current < 425mA
Amp Controller PA FET 2
Bias Warning
50V Current 2 Warning Drive Chain LED
orange.
25W Amp
:
>= 300mA
50W Amp
:
>= 425mA
25W Amp
:
250mA <= Current < 300mA
50W Amp
:
375mA <= Current < 425mA
Table 6-8 PA Faults
Fault Log Message Fault Description Front Panel LEDs
Nominal Value/
Scaling
Trip Level