I have the unit ref. 5878.
I wish to convert the unit to receive an input signal of 735.25 MHz and provide this signal out at 46.25 MHz.
Please advise as to the positions of the internal switches.
These converters feature three internal filters:
These filters are adjusted according to the needed output/input channel conversion.
The internal dipswitches only allow you to select the right frequency for the channel converter local oscillator.
In other words, you need to change the position of the switches and you also need to adjust the filters.
These operations require specialised equipment such as network analysers.
In any case, the reference that you mention will not be able to carry out the conversion from UHF to VHF, because it is a UHF to UHF converter.
You must use ref. 5879 which is a UHF to BI converter.