Fluke 9640A Series, Instruction Manual

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9640A
Instruction Manual
1-16
Frequency and Phase
[1]
Modulation
Waveform FM: Sinusoidal, or External signal. PM: Sinusoidal only.
Carrier Frequency (Fc) 9 MHz to 4 GHz
Carrier Frequency Accuracy Internal Frequency Reference: 0.04 ppm + 240 mHz
External Frequency Reference: Ext Freq Ref Ac 240 mHz
Rate (Fr) 1 Hz to 300 kHz
Rate Resolution 0.1 Hz, 5 digits
Rate Accuracy ≥
1 kHz: ±1 digit, <1 kHz: ±10 mHz
Deviation (Fd)
[2]
Fc 9 MHz to 31.25 MHz: FM: 10Hz to 300 kHz, PM:
≤
1000rad
Fc 31.25 MHz to 125 MHz: FM: 10 Hz to 750 kHz, PM:
≤
1000rad
Fc 125 MHz to 4 GHz: FM: 10 Hz to 0.12 % Fc, PM:
≤
1000rad or 0.12 %Fc/Fr
Deviation Resolution FM: 0.1 Hz, 5 digits. PM: 0.0001rad, 5 digits
FM/PM Sine Deviation
Accuracy
[2]
3 % of s 240 mHz.
Typically 0.25 % of s 240 mHz, for
≤
50 kHz rate.
FM/PM Sine Distortion
[2] [3]
≤
-40 dBc (1 %) +20 dB/decade above 10 kHz (See chart).
Typically
≤
-65 dBc +20 dB/decade above 1 kHz.
[1] Phase modulation is generated by applying sinusoidal frequency modulation with peak deviation derived from the phase deviation
and rate settings (Fd =
φ
d x Frate).
[2] See chart showing maximum available deviation, and maximum deviation for which deviation accuracy and distortion specifications
apply. Applies to demodulated signal content at rate fundamental frequency. Specifications are typical for modulation rates <20Hz.
[3] Includes harmonic distortion and noise up to 5 times rate frequency.
FM Deviation Limits and Performance Specifications
10 Hz
11 MHz
Deviation
(Fd)
300 kHz
180 kHz
220 kHz
4.8 MHz
750 kHz
125 MHz 31.25 MHz 4 GHz
Performance Specifications Applicable
Max Available Deviation
66 kHz
150 kHz
9 MHz
FM & PM Distortion
Rate (kHz)
-40
-30
-20
-50
10
Distortion
(dBc)
300 100 1
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