The XML shows downlink frequencies in Hz and uplink in MHz. It's not stated explicitly in the XML, but that's the pattern. There's some logic to that choice:

• uplinks can be done at an exact frequency: you're commanding a setting for the transmitter.
• for downlinks you get a Doppler shift which you want to quantify in as much precision as you can (because it contains information)

The XML shows downlink frequencies as a high-precision number in Hz and uplink as a round number in MHz. It's not stated explicitly in the XML, but that's the pattern. There's some logic to that choice:

• uplinks can be done at a fixed frequency (except when your receiver has a fault that requires exact transmissions, see Huygens).
• for downlinks you get a Doppler shift which you want to quantify in as much precision as you can (because it contains information)