11k2f3e refers to 11.25kHz of occupied or authorized bandwidth.
The highest modulating frequency is 3.125kHz.
12.5kHz and 25kHz refer to the channel bandwidth or spacing. The authorized bandwidth is narrower than the channel spacing. The emission designator (11k2f3e for example) tells the authorized bandwidth and the modulation type.
Ham [HA] = N1DAS (2/1984)
GMRS [ZA] = KAE9013 (12/1992)