NM20216A-F
19
Technical data
1
• Input
±
10 V
• Maximum load impedance: 100
Ω
1.6.5.
Liquid Helium level gauge and display
• Readout: remotely by real-time data acquisition computer or manually
over local display
• Probe active length (nominal): 55 cm
• Probe resistance (nominal, at 300 K): 300
Ω
• Probe resistance (nominal, at 10 K): 250
Ω
• Local display on side panel of the gantry: on/off button, display 0–
100 %
1.6.6.
Stimulus cabinet
• Cabinet type: Schroff HF1
• Cabinet RF attenuation: –90 dB @ 30 MHz, –70 dB @ 300 MHz, –
50 dB @ 1 GHz
• mains line RF filter: 10 A 250 V max. dual filter (L,N)
• Installation of the mains line RF filter: permanent
• Filtered power outlets inside cabinet: 6, manual circuit breaker with
indicator light
• Max. current of the outlet sockets: 10 A in total
• Mains power: via an isolation transformer (see 1.4.5), permanently
installed
• Auxiliary feedthrough filters: BNC 1–2, XLR NC connectors 1–2: 20
dB/decade above 20 kHz, feedthrough resistance 7
Ω
; BNC 3–5, XLR
NC connector 3: –20 dB @ 10 MHz, –65 dB @ 100 MHz, feedthrough
resistance < 1
Ω
.
• Signal feedthrough filters (option): 1 x 32 differential channels, 60 dB/
decade above 60 kHz. Feedthrough resistance 70
Ω
.
• Maximum signal input/output level to any feedthrough:
±
15 V. Note!
the actual value depends on instrument connected by the user to the
feedthrough inside the cabinet.
• Cooling: free convection, air flow from base plate (dust filtered) to top
cover
• Dimensions and weights: see chapter 2
1.6.7.
Audio electronics interface
• Earphone output for patient and assistant
• Tubal insert earphones
• Feedthrough RF filter for audio stimulus signals
