A frequency interference prediction system in a multiple frequency, multi-frequency, distributed antenna system, DAS, comprising: a communications signal interface, comprising: a first communications signal interface configured to receive at least one first communications signal in at least one first frequency range; and a second communications signal interface configured to receive at least one second communications signal in at least one second frequency range different from the at least one first frequency range; a first communications signal path communicatively coupled to the first communications signal interface, the first communications signal path comprising: a first frequency shifting circuit configured to frequency shift the at least one first communications signal from a first frequency in the at least one first frequency range to a shifted first communications signal at a shifted first frequency based on a first frequency control signal; a second communications signal path communicatively coupled to the second communications signal interface and configured to provide the at least one second communications signal as an output second communications signal to a second communications signal path output; a combiner communicatively coupled to first communications signal path output and the second communications signal path output, the combiner configured to combine an output first communications signal and the output second communications signal into a combined multi-frequency communications signal; and a controller (58U, 58D) configured to: predict frequency interference in the combined multi-frequency communications signal; and if frequency interference is predicted in the combined multi-frequency communications signal: determine the shifted first frequency to shift the at least one first communications signal in the combined multi-frequency communications signal; and set the first frequency control signal to cause the first frequency shifting circuit to frequency shift the at least one first communications signal to the shifted first communications signal at the shifted first frequency. a communications signal interface, comprising: a first communications signal interface configured to receive at least one first communications signal in at least one first frequency range; and a second communications signal interface configured to receive at least one second communications signal in at least one second frequency range different from the at least one first frequency range; a first communications signal interface configured to receive at least one first communications signal in at least one first frequency range; and a second communications signal interface configured to receive at least one second communications signal in at least one second frequency range different from the at least one first frequency range; a first communications signal path communicatively coupled to the first communications signal interface, the first communications signal path comprising: a first frequency shifting circuit configured to frequency shift the at least one first communications signal from a first frequency in the at least one first frequency range to a shifted first communications signal at a shifted first frequency based on a first frequency control signal; a second communications signal path communicatively coupled to the second communications signal interface and configured to provide the at least one second communications signal as an output second communications signal to a second communications signal path output; a combiner communicatively coupled to first communications signal path output and the second communications signal path output, the combiner configured to combine an output first communications signal and the output second communications signal into a combined multi-frequency communications signal; and a controller (58U, 58D) configured to: predict frequency interference in the combined multi-frequency communications signal; and if frequency interference is predicted in the combined multi-frequency communications signal: determine the shifted first frequency to shift the at least one first communications signal in the combined multi-frequency communications signal; and set the first frequency control signal to cause the first frequency shifting circuit to frequency shift the at least one first communications signal to the shifted first communications signal at the shifted first frequency. predict frequency interference in the combined multi-frequency communications signal; and if frequency interference is predicted in the combined multi-frequency communications signal: determine the shifted first frequency to shift the at least one first communications signal in the combined multi-frequency communications signal; and set the first frequency control signal to cause the first frequency shifting circuit to frequency shift the at least one first communications signal to the shifted first communications signal at the shifted first frequency. determine the shifted first frequency to shift the at least one first communications signal in the combined multi-frequency communications signal; and set the first frequency control signal to cause the first frequency shifting circuit to frequency shift the at least one first communications signal to the shifted first communications signal at the shifted first frequency.