Fluke 5080A Service Manual page 76

5080A
Service Manual
models if necessary.
Equipment Required
Table 44 is a list of the equipment necessary to make hardware adjustments to
the Product.
Extender card
Oscilloscope and Sampling head
10 dB Attenuator
Spectrum Analyzer
Cable supplied with SC200
You will also need a standard adjustment tool for adjusting the pots and trimmer
capacitors.
How to Adjust the Leveled Sine Wave Function
This is one adjustment procedure for the leveled sine wave function that adjusts
the harmonics. To adjust the level sine wave function:
1. Set the Product into leveled sine wave mode.
2. Set the Product output to 5.5 V p-p at 50 MHz.
3. Push .
4. Connect the Product to the Spectrum Analyzer.
5. Set the spectrum analyzer so it shows one peak across the horizontal
6. Set the spectrum analyzer to the parameters in Table 45.
Start Frequency
Stop Frequency
Resolution Bandwidth
Video Bandwidth
Reference Level
7. Use the search function on the spectrum analyzer to find the reference signal.
66
Table 44. Test Equipment for Hardware Adjustments
Test Equipment
centerline. The far right of the peak is fixed at the far right of the centerline, as
shown in Figure 19.
Table 45. Spectrum Analyzer Parameters
Parameter
The spectrum analyzer display will show the fundamental with the second
and third harmonics. This adjustment will set the second harmonic to -34 dBc.
The third harmonic can be at -39 dBc or more as shown in Figure 19.
Recommended Model
Fluke PN 661865 (5800A-7006K Extender kit)
Tektronix 11801 with SD-22/26 or Tektronix
TDS 820 with 8 GHz bandwidth
Weinschel 9-10 (SMA) or Weinschel 18W-10
HP 8590A
Fluke
Value
50 MHz
500 MHz
3 MHz
3 kHz
20 dBm