Agilent Technologies 70341A Installation Manual page 64

Residual FM:
At 1 GHz,
Residual FM decreases 6 dB per octave below 1 GHz.
AM Noise Floor: (at 0 dBm and o sets greater than 5 MHz from carrier)
<
150 dBm/Hz, 1 - 20 GHz.
<
140 dBm/Hz, 0.01 - 1 GHz.
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Typical residual FM measured in 50 Hz - 15 kHz bandwidth, CW mode.
<
15 Hz in 50 Hz - 15 kHz bandwidth.
Reference
Speci cations- HP 70340A/41A
3-19