Low-Level Accuracy Test - Fluke 6060B Instruction Manual

MAINTENANCE
PERFORMANCE TESTS
I
H
OUTPUT POWER
ATTENUATION PROGRAM measured ERROR
(dB)
SECTION
LIMIT
(dB)
SECTION NOMINAL
(dBm) (dBm) (dB)
0
0
+12 +12.2 +0.2 +12.2-12.0
=
-K).2
1
6 + 6 +05.9
-0.1 -12.2+5.9+6
=
+0.3
2
12
0
"0D.2
-0.2 -12.2-0.2+12
= -0.4
3
24
-12
-12-1 -Q.1
"12.2-12.1+24
= -0.3
4
24
"12
CSPCLKS:
LZ2
-11.8
+0.2
-12.2-11.8+24
=
+0.0
5
24
-12 CSPCL]CS]C4] -12.0
+0.0
-12.2-12.0+24
=
-0.2
6
24
"12 tSPCL3C83
C53
-12.3 -0.3
-12.2-12.3+24
-
"0.5
7
.
24
-12 cspcl:c8:c6: -11.9
+0.1
-12-2-11-9+24
=
-0,1
Sum
of
Errors
=
-1,0
Figure 4A-3. High-Level
Accuracy
Test Conditions
4A-7.
LOW-LEVEL
ACCURACY
TEST
The Power Meter
with a
Low-Level Sensor and
the calibrated
60-dB
Attenuator
are used
to verify the
U UT
level
accuracy
at -1
27
dBm
and
at
frequencies of
1
20, 244, 245, 850,
and
1050
MHz,
by
using
the
Spectrum Analyzer
as
an
indicator.
REQUIREMENT
Amplitude
accuracy
is
±1.0
dB
from +13
to
-127
dBm.
TEST
EQUIPMENT
Wideband Amplifier
60-dB Attenuator
RF
Spectrum Analyzer
Power Meter
with a
Low-Level Sensor
REMARKS
This
test,
in
conjunction with the
Mid-Level Accuracy and High-Level Accuracy
Test,
verifies
the overall
level
performance of
the
UUT.
Failing this test,
but passing
the
High-Level Accuracy
Test,
probably
indicates
a
leak-
around problem
in the
UUT
attenuator. Service
tip:
Check
for
a broken feed-through
filter
or
improper mechanical assembly,
i.e.
,
loose
screws
and/or
damaged
or misplaced gaskets.
It is
convenient
to
use the
UUT RF ON/OFF
control
when
zeroing the
Power
Meter.
4A-7