Fluke 9640A Series, Instruction Manual

Page: 37 / 324

Introduction and Specifications
Specifications
1
1-17
FM External
Input
Rear panel Modulation Leveling and Frequency Pull BNC connector, 10 k
Ω
nominal
input impedance.
Bandwidth (-3 dB) DC coupled: DC to 300 kHz typical.
AC coupled: 10 Hz to 300 kHz typical.
Deviation Sensitivity User adjustable, 500 Hz/V to 19 MHz/V, carrier frequency dependent.
Input Level ±2 V pk maximum operating, ±5 V pk absolute maximum
Carrier Frequency Accuracy As FM Internal Sine + 20 mV x deviation/V setting, typical.
Deviation Accuracy
[1]
3 % of s 240 mHz, for 1 Vpk input, DC or 200 Hz to 20 kHz rate, deviation
>0.01 %Fc.
Residual Distortion
[1] [2]
As FM Internal Sine, for 1 Vpk input, deviation >0.01 % Fc.
Typically
≤
-55 dBc +20 dB/decade above 10 kHz, for 1 Vpk input, deviation >0.01 % Fc.
[1] See chart showing maximum available deviation, and maximum deviation for which deviation accuracy and residual distortion
specifications apply.
[2] Includes harmonic distortion and noise up to 5 times rate frequency.
Modulation Trigger Output Rear panel Trigger I/O BNC connector
Level TTL compatible logic output, selectable as rising or falling edge
Timing Alignment ±500 ns typical, from modulation waveform zero crossing for Sinusoidal or
positive peak for Triangle.