LDG RVS-8 Manual - page 13

13

Alignment 

The first step in alignment is to make sure that each channel is matched to the proper COR and 

Disable Active State. Test each input to make sure that when the COR becomes active on your 

receiver, the voter responds properly and shows that channel as having an active COR. 

The calibration process is fairly simple. Start with the eight audio pots and eight noise pots 

centered. Each channel will be calibrated in the same manner, so only the first channel will be 

discussed and the user can then calibrate the other channels as needed. 

An RF signal generator and oscilliscope will be useful in the alignment process, but you can be 

creative with other test equipment and achieve proper calibration. 

Start by transmitting an on-frequency signal of 1000 Hz at 3.0 KHz deviation to your first remote 

receiver. Be sure that the signal is full quieting. Place the scope on test point AUD1 and adjust the 

AUD1 pot for 1.0 volts peak to peak. 

Remove the test signal and open the squelch of the first remote receiver. Place the scope on test 

point Noise1 and adjust the Noise1 pot to read 3.5 volts.  

Repeat for channels 2 through 8, or for the number of channels used. 

The Audio Out pot is used to set the overall output level of the voter.  

Tips 

If you don’t have a signal generator, you can use a transceiver and press the touch tone pad to 

generate a tone signal. This can be used to get the voter adjustments close. 

If you have a difficult time getting the Noise adjustment down to 3.5, lower the AUD adjustment 

to 0.5 volts peak to peak. If you do this, make sure that all receivers are set to 0.5 volts. As long 

as all inputs are set to the same voltage level, you can lower the signal down to 0.2 volts peak to 

peak if needed. 

They type of audio used from the receivers can be just about any type as long as all of the 

receivers use the same audio. Audio types that are acceptable are line level and speaker audio. 

Also, it does not matter if the audio is de-emphasized or not as long as all of the receivers are the 

same.  

The biggest problem seen in getting the voter to work properly is a mis-match in the audio 

characteristics between the receivers. Many times, doing a frequency sweep with expose 

differences in the audio response. Since there are literally dozens of different receivers that you 

could use, there could be dozens of different audio responses possible. Usually the best way to get 

near identical audio responses is to use the same brand and model of the remote and link receiver. 

Care and Maintenance 

Your RVS-8 voter is maintenance-free. As with any modern electronic device, your RVS-8 can 

be damaged by water, temperature extremes, impact or static discharge.