Fluke 6060B Instruction Manual page 119

I
I
I
ATTENUATION
I
SECTION
0
I
1
2
I
3
4
I
5
. 6
I
7
I
I
LOW-LEVEL ACCURACY TEST
4A-7.
The Power Meter with a Low-Level Sensor and the calibrated 60-dB Attenuator are used
I
to verify the UUT level accuracy at -127 dBm and at frequencies of 120, 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.
I
TEST EQUIPMENT
Wideband Amplifier
60-dB Attenuator
I
RF Spectrum Analyzer
Power Meter with a Low-Level Sensor
I
REMARKS
This test, in conjunction with the Mid-Level Accuracy and High-Level Accuracy Test,
verifies the overall level performance of the UUT.
I
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 I or damaged or misplaced gaskets .
•
It is convenient to use the UUT RF ON/OFF control when zeroing the Power
Meter
•
OUTPUT PO WE R
PROGRAM
NOMJ:NAL
(dBm)
0 +1 2
6 + 6
1 2 0
24 -1 2
CBJ [3]
[SPCLJ
-1 2
2 4
2 4 -1 2 CSPCL] C8J C4J -1 2 . 0
24 -1 2 CSPCL) [8) [5] -1 2 . 3
CSPCL]
2 4 -1 2 C8J [6] -1 1 . 9
Figure 4A·3. High-Level Accuracy Test Conditions
.
MEASURED ERROR SECTION
ERROR
(dBl
(dBm) (dB)
+1 2 . 2 +0 . 2 +1 2 . 2-1 2 . 0
-0 . 1 -1 2 . 2+5 .9+6
+05 . 9
-00.2 -0.2 -1 2 .2-0.2+1 2
-1 2 . 1 -0 . 1 -1 2 .2-1 2 . 1 +24
-1 1 . 8 +0.2 -1 2 . 2-1 1 . 8+24
-1 2.2-1 2 .0+24
+0 . 0
- 0 . 3 -1 2 . 2-1 2 .3+24
+0 . 1 -1 2.2-1 1 .9+24
Sum o f Errors
MAINTENANCE
PERFORMANCE TESTS
LIMIT
(dB)
= +0 . 2
= +0.3
= -0 . 4
-0.3
=
= +0.0
-0 . 2
=
=
-0.5
=
-0 . 1
=
-1 . 0
4A-7