85081B High Impedance Input
Module, 100 kHz to 1 GHz
Data Sheet
Partial Specifications for an Agilent 8508A with an Agilent 85081B Input Module
Frequency Range: 100 kHz to 1 GHz
Measurement Range (A and B Channel Maximum Input Levels):
Magnitude Measurements
100 kHz to 1 MHz: 300 mV
1 MHz to 1 GHz: 1 V
Phase Measurements
300 kHz to 1 GHz: 300 mV
A (Ref) Channel Minimum Input Levels for Magnitude and Phase Measurements
100 kHz to 300 kHz: 10 mV
300 kHz to 3 MHz: 1 mV
3 MHz to 1 GHz: 300 µV
B (Meas) Channel Noise Floor
1 MHz to 1 GHz: 10 µV rms
Input Crosstalk
100 kHz to 500 MHz: >100 dB
500 MHz to 1 GHz: >80 dB
Impedance SWR
100 kHz to 750 MHz: <1.15
750 MHz to 1 GHz: <1.45
Probe: 100 kohm shunted by 2.5 pF (nominal)
Maxi mum Inpu t (Damage Level):
2 Vac peak, ±50 Vdc
Measurement Bandwidth: 1 kHz (nominal)