A run-of-the-mill digital volt meter connected between signal and ground on the output end of the PWM cable sending a standard Victor spec signal (from a cRIO) will read:
Neutral = .75v
Forward = 1.0v
Reverse = .5v
The meter reading isn't bothered by the pulsed nature of the PWM signal.
(These voltages are as measured)
P.S. Joe reminded me that the IFI signal voltage was lower, and I'd assume that the signal driver cable would mirror those lower voltages that Joe listed.
However, the PWM voltage I measure off an old pBasic IFI controller has neutral at .32v, rather than .375, so some variation between controlling devices should be expected. If the OP measures the signal cable output, please post the voltages you get for our future reference.
(For completeness for those robotics teams wanting to measure this on a cRIO, a Jaguar range signal will read:
Neutral = 1.49v
Forward = 2.29v
Reverse = .67v
Quote:
Originally Posted by Ether
With everything set up and turned on, and a full-speed command being issued, unplug the PWM connecter from the Vic and use a voltmeter set for 15VDC to measure the signal voltage between the two outer pins (black and white) of the connector.
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Quote:
Originally Posted by Al Skierkiewicz
This will not read 5 volts. You may not read anything depending on the device in the PWM cable since it would be pulled up in the Victor by the internal power supply and opto coupler.
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If anybody ever uses a terabyte in the next few years the world would probably come to an end - spadercool [more] 
05-01-2012, 18:55
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