Fluke 6060B - Alternate Accuracy and Leakage Tests

MAINTENANCE
PERFORMANCE
TESTS
PROCEDURE
a. Program the
UUT
to the Instrument Preset
State
[RCL]
[9][8],
then program
30
MHz and
-67
dBm.
b. Calibrate and then connect the
Power Meter with
a Low-Level Sensor to the
UUT RF OUTPUT.
c. Program the UUT to
-67
dBm.
d. Zero the Power Meter.
e. With the Power Meter, measure
the UUT output power (in dBm) and record the
measurement
as
the
variable P.
f. Connect UUT RF
OUTPUT
through the 60-dB Attenuator
and
the Wideband
Amplifier
to the input of the RF
Spectrum
Analyzer. Use well shielded cables to
avoid leakage that could
affect
the measurement.
g.
Adjust
the Analyzer
to
display the
signal, using a resolution
bandwidth of 1 kHz
and a vertical display of
1 dB/ Div.
Adjust the reference level so that the response
is at a convenient
reference
point on the display, e.g.,
2 dB
below top scale, This
signal response corresponds to a level of
(P-A)
dBm, where A is the value of the
60 dB Attenuator.
h. Program the UUT to a
level
of
-127
dBm, remove the 60-dB Attenuator, and
note the difference in the resulting
response
on the Spectrum Analyzer from the
previous
response (P-A). The actual UUT output level
is
(P-A) plus this
difference and
should agree with the programmed level to within ±
1.0
dB.
i. Repeat
steps
c
through
h for frequencies
of
244,
245, 850,
and 1050 MHz.
4A-8. ALTERNATE-LEVEL
ACCURACY TEST
The Measuring
Receiver
is used to verify the UUT level
accuracy from -l-l 1 dBm to-l27
dBm, and
at
various
amplitude and frequency settings
that
test all level ranges of the UUT
on all RF bands.
REQUIREMENTS
Amplitude accuracy is ±1.0
dB
from
+13
dBm to
-127
dBm, frequency > 0.4MHz.
TEST
EQUIPMENT
Measuring Receiver
REMARKS
This one test is a more comprehensive
test than the High-Level,
Mid-Level,
and Low-
Level Accuracy tests.
Failing
this test at levels above approximately
-50
dBm indicates
the need to replace the
A2A4 Output and/or
A2A5 Attenuator/ RPP assembly.
I
4A-8
Failing this test at lower levels probably
indicates
a leak-around problem with the
Attenuator. Check for loose connectors,
loose
screws, improper gasketing, or a broken
feed-through filter.