Anritsu MS2722C - Page 97

Operation Error Messages
Spectrum Master UG PN: 10580-00277 Rev. E B-7
It is important to keep the fan inlet and exhaust ports clear of obstructions. The cooling fan
will vary the speed in relation to the internal temperature of the instrument. The fan will
turn on at low speed when the internal temperature of the instrument reaches 44ºC, and will
increase the fan speed to maximum at 54ºC. As the internal temperature of the instrument
decreases, the fan will reduce speed until the temperature reaches 39ºC, at which point the
fan will turn off.
High Temp Warning
The internal temperature has reached an excessive level, 85ºC. Verify that the ventilation
openings are unobstructed and that the fan is running. Internal temperatures may be
manually verified by using the SELF TEST function. Turn off the unit and allow the
temperature to cool down. If the fault is not resolved and if the internal temperature reaches
90ºC, then a countdown of 10 seconds will begin to give the user a chance to save the current
setup before it will turn itself off (before internal temperatures can cause any damage). If the
error persists after removing any obstructions and allowing the unit to cool, then reset to the
factory defaults with either Factory Defaults, ESC+ON. Caution: Use of MASTER RESET,
System+ON, will erase all user saved setups and measurement traces and return the unit to
a fully Factory Default condition. If the error persists, then contact your Anritsu Service
Center.
Copy failed. Please check External USB Memory
Attempt to copy user saved data to the external USB Flash drive has failed. Do not attempt to
remove or power down the unit before the copy has completed. Be sure that the USB memory
device is not already full and that it is fully inserted into the USB connector.
PLL Lock Fail
Phase Lock Loop failed to lock.
Trace not saved. Please wait for complete sweep and try again.
Attempted to save a measurement trace before the sweep had completed at least once. Wait
for at least one complete sweep and try to save again.
Figure B-1. Fan Speed versus Temperature
FAN
SPEED
OFF LOW HIGH
H
I
T
E
M
P
W
A
R
N
IN
G
A
U
T
O
S
H
U
T
O
F
F
Temperature Rising
FAN
SPEED
OFF LOW HIGH
Temperature Falling
TEMP
39
41
43
45
47
49
51
53
-100
85
90
+100
o
C
40
42
44
46
48
50
52
54