DS-GPS-Clock Setup with SBox

HI,

Just trying to configure a DS-GPS-Clock with an Sbox and some sirius slices. However, I don't get the expected options in the settings menu as per Section 4.3.1 of the DS-GPS-Clock user manual. I am only getting the option to select EthercatPPS as an external clock source. My end goal is to configure the DS-GPS-Clock as to have a GPS input, provide synchronisation time to the SBox and via the BNC connector on the DS-Clock-GPS provide an IRIG-B signal to a different test setup.

I have tried the following setups:

SBox connected to DS-GPS-Clock Via USB cable

DS-GPS ClockGPS antenna plugged connected

DS-GPS-Clock Sync cable (4 pin lemo) to SBox (have tried with this cable connected as well as disconnected)

DS-Clock-GPS power light on and Status light flashing on once per second

DS-Clock-GPS displaying as a connected device in the settings menu

GPS antenna location is not ideally positioned, however it is placed on a window in a low rise building.

As above but with one and 2 Siriuswe slices connected via USB

A I missing something in the setup (I have nothing connected to the GPS connector on the SBOX nor the Multi I/O connector on the DS-GPS-Clock)?