When equipped with the optional internal battery pack (R&S FSL-B31), the R&S FSL can be used independent of the mains supply for at least one hour. Easy and fast battery exchange in the field increases battery operation time.
If the battery runs low during operation, a message is displayed. In this case, use another power supply or switch off the instrument.
The power supply can be changed during operation. To switch from battery to AC or DC power supply, connect the R&S FSL to the AC or DC power supply and, in case of the AC power supply, press the AC power switch on the rear panel to position I.
The battery pack can be charged without removing via the AC or the DC power supply:
- To charge the battery using the AC power supply, plug in the AC power supply and switch on the AC power on the rear panel. The ON/STANDBY key on the front panel can be set either way
- To charge the battery pack using the DC power supply, connect the instrument to the DC power supply
If you have more than one battery pack in use, you can charge the battery pack outside the instrument using the power supply unit of R&S FSL-Z4 (DC Supply for R&S FSL-B31). An LED with the inscription "Charge" is switched on during charging.