These option might be handy especially when the correlator is split in more bands. Option 2 and 3 shift the correlator band by a fixed amount, typically used in frequency switching or testing for bad channels. This parameter is only valid for the next observation. The number of transfers per subscan depends upon the integration time, which is relevant for a subscan. This is dependent on the splitmode and can vary between 10 to 160 MHz.
Special modes have certain bandwidthes.
If there is only one possibility for a special splitmode, the bandwidth is automatically set. 3.2,math nachtrag.tex .