01 · Calculator
Cable loss & frequency filter
Signal attenuation and cut-off (−3 dB) frequency introduced by a transmission cable for voltage-mode, current-mode and IEPE signal chains. Gold-topped fields are inputs; the cable run is shared across all three modes.
Cable run SHARED
meters
Ohm/km
Cable resistance (one conductor)
—
Pick a transmission cable in the Voltage or Current card to auto-fill its
datasheet capacitance and resistance. Rc is shared across all modes — the last
cable selected sets it.
Voltage mode V
Ohm
kiloOhm
+ shield
pF/m
pF/m
Ohmic loss—
Overall capacitance Ctotal—
Cable capacity Cc—
Cut-off Fv
—Hz
Current mode I
Ohm
+ shield
pF/m
pF/m
Overall capacitance Ctotal—
Cable capacity Cc—
Uses cable resistance from cable run—
Cut-off Fc
—Hz
I.E.P.E. mode IEPE
mA
mA
mV/g
g
Remaining current available Ia = Ips − Imin—
Cable capacity (from current mode)—
Limit Fiepe
—Hz
Additional slew-rate limit set by the available drive current. The usable
bandwidth is the lowest of Fiepe and the current-mode cut-off Fc.
Field to enter (compulsory)
Result — cut-off frequency
Intermediate result
02 · Graphs
Cable transmission distance
Maximum frequency of interest transmittable over a given cable distance, from sensor to monitor, for voltage mode, current mode (MPC4) and current mode with a GSI 127 low-impedance input.
Cable & system parameters
Cable presets (datasheet)
Cable (from datasheet)
pF/m
pF/m
Ohm/km
Current transmission
Ohm
Ohm
Voltage transmission
Ohm
Pick a cable preset above to auto-fill its datasheet capacitance and resistance.
Cable resistance is shared by all three curves — the last preset chosen sets it.
Maximum frequency of interest vs. distance
| Distance (m) | Voltage (Hz) | Current (Hz) | Current w/ GSI (Hz) |
|---|
Interactive port of LongDistanceCalculator.xlsx and CableGraphsandTransmissionCalculations.xlsm. Background and derivations: see the Cable Length & Attenuation application note.