Larson Davis SoundAdvisor Reference Manual page 11

Accessory Type
Equivalent Electrical Impedance Adapter Options
Choose one of the following adapters in place of the microphone when making very high
impedance measurements. The adapter acts as a series capacitor with the same capacitance as
the microphone it replaces. If you're making a square wave pulse measurement, include a 100
kHz, low pass, T filter with the adapter.
(ADP002) 6.8pF BNC Input
Adapter for ¼-inch, 7pF
microphone equivalent
Microphone Extension
Cable: EXCXXX (shielded),
where XXX is the length in
feet (XXX = 010, 020, 050,
100 and 200 available)
SoundAdvisor Model 831C
(ADP090) 12pF, BNC Input
Adapter for ½-inch,
microphone equivalent
Cables: Extension and Interface Cables
CBL138 USB Cable
Options and Accessories
Available Options
(ADP092) BNC In-Line, Low
12pF Pass Filter, 75kHz
CBL139 AC/DC Output Cable
1-6