Fluke 9640A Series, Инструкция по эксплуатации

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9640A
Instruction Manual
5-8
5. Set the frequency counter as follows:
Frequency
Slope Positive
Coupling AC
Input Impedance
50
Ω
Attenuation 1x
Trigger Mode
Auto
6. Set the output frequency of the UUT to each of the frequencies listed in Table 5-2. At
each frequency allow the frequency counter to take several readings and settle; the
settled reading must be within the tolerance shown.
7. Set the UUT output to
STBY
. Remove all connections to the Leveling Head.
Table 5-2. Frequency Accuracy Test
UUT Frequency Tolerance
10 kHz 9.999 999 44 – 10.000 000 56 kHz
10 MHz 9.999 999 60 – 10.000 000 40 MHz
30 MHz 29.999 998 80 – 30.000 001 20 MHz
50 MHz 49.999 998 0 – 50.000 002 0 MHz
100 MHz 99.999 996 0 – 100.000 004 0 MHz
500 MHz 499.999 980 – 500 000 020 MHz
1 GHz 0.999 999 960 – 1.000 000 040 GHz
2 GHz 1.999 999 920 – 2.000 0000 80 GHz
2.7 GHz 2.699 999 892 0 - 2.700 000 108 0 GHz
4 GHz 3.999 999 840 – 4.000 000 160 GHz
Harmonics and Spurious Signal Content
Equipment required for this test:
•
Spectrum Analyzer
•
50
Ω
Leveling Head (supplied with UUT)
Use the following test to verify the harmonic and spurious signal content of the UUT
output.
1.
Connect the output of the 50
Ω
Leveling Head to the RF INPUT of the spectrum
analyzer.
2. Connect the REF FREQUENCY OUTPUT (rear panel) from the UUT to the
spectrum analyzer Ext Ref In (on rear). See Figure 5-6 for equipment connections.
3. On the UUT enable the REF FREQUENCY OUTPUT at 10 MHz.
4. Set the spectrum analyzer as follows:
PRESET
EXT REF
On
COUPLING DC
REF LVL
+30 dBm
FREQ 20 kHz
SPAN 100 Hz