rtr12 posted:George Mason posted:rtr12 posted:
TIU variable channels are based on 0-22 volts. Using only 18 volts, as from a PH-180, will always give a lower reading on the remote. If you have Barry's book he explains it much better than I can. I have only used a variable channel one time, and it was quite a while ago.
I guess that I wasn't clear enough. The brick is plugged into the VAR1 input . Using the remote, I set the VAR1 output voltage to 15 volts. I first had wires running to the track from VAR1 outputs and was getting a low reading . So I disconnected the wires and measured the voltage at the outputs. The multimeter read 7.5 volts on the VAR1 output jacks.
I was trying to say this sounds like normal behavior for a TIU's variable channel output. The TIU bases it's variable channel output on 22 volts input. The PH-180 only provides the TIU with 18 volts. Your actual voltage output will always be lower than the setting on the remote.
Also, you probably need a true RMS volt meter to accurately read the variable channel outputs.
Should I use my Z-1000 as input to the VAR1 port or just bypass the TIU?