Fluke 6135A/PMU, Руководство оператора

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6135A/PMU
Operators Manual
8-4
Troubleshooting
General
Problem Probable Cause Action
A unit in the Calibration System
does not turn on.
1. Not plugged in.
2. Power not available.
3. Fuse blown.
4. Power module or power circuit
board is bad.
Complete these steps in order:
1. Make sure the unit is plugged
in and power is available.
2. Unplug the unit and check the
fuses.
6135A/PMU System Timing Unit
For information on the LEDs on the front panel, see “6135A/PMU System Timing Unit”
in Chapter 1.
Problem Probable Cause Action
IRIG Present LED is off when
power is on.
When the LED is off, the system
is not receiving a IRIG signal or
connected to the IRIG output on
the GPS receiver.
Complete these steps in order:
1. Make sure the GPS receiver
is locked onto a satellite. See
“GPS Receiver” in Chapter 3.
2. Check the IRIG connection,
see Figure 8-1.
GPS Clock Available LED if off
when power is on.
When the LED is off, the system
is not receiving a IRIG signal or
connected to the IRIG output on
the GPS receiver.
Check the GPS Clock 10 MHz In
connection. See Figure 8-1.
REFP Active is off when power is
on.
When the LED is off, the system
is not receiving a REFP signal or
connected to the REFP output on
the GPS receiver.
Check the 6135A/PMU System
Timing Unit Ref Out to the 6105A
Phase Ref Out connection. See
Figure 8-1.