HP8640B Test Results
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Below are a number of
pictures of the RF output. Apologies for the quality. I'll re-do
these later. During the tests I didn't change the setting of
the attenuator which was set at approximately 0dBm at the 0dBm
switch setting, apart from the final check to see the amplitude
of the 1GHz signal, when I turned the atttenuator to +20dBm.
The last picture shows an FM signal. |
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Below, the 2nd harmonic
of 512MHz with the fundamental at 0dBm |
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Next, the same signal
but with the attenuator turned to +20dBm, hence the level increase
of 20dB. |
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Below, a 120MHz +/- 10KHz
FM test signal |
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Summary showing relative
fundamental and 2nd harmonic levels. You'll note that the test
frequencies were towards the minimum frequency and not the centre
of each range. |
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Range MHz |
0.5-1 |
1-2 |
2-4 |
4-8 |
8-16 |
16-32 |
32-64 |
64-128 |
128-256 |
256-512 |
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Test Frequency |
0.5MHz |
1MHz |
2MHz |
4MHz |
8MHz |
16MHz |
32MHz |
64MHz |
128MHz |
256MHz |
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Level (0dBm) |
0.45dBm |
0.29dBm |
0.21dBm |
-0.18dBm |
-0.44dBm |
-0.63dBm |
-0.09dBm |
-0.19dBm |
-0.27dBm |
-0.9dBm |
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2nd Harmonic |
-30dBm |
-30dBm |
-40dBm |
-40dBm |
-45dBm |
-44dBm |
-42dBm |
-38dBm |
-35dBm |
-33dBm |
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