Agilent 5385A Frequency Counter
Data Sheet
Channel A Characteristics
Range:
10 Hz to 100 MHz
Sensitivity: [MAIN LEVEL] off
15 mVrms sine wave 50 Hz to 100 MHz
25 mVrms sine wave 10 Hz to 50 Hz
45 mV pk-pk 5 ns minimum pulse width
Dynamic Range:
45 mV to 4 V pk-pk × attenuator setting.
Coupling:
A C
Impedance:
X1: 1 Mohm NOMINAL | | <25 pF
X20: 500 kohm NOMINAL | | <25 pF
Attenuator:
X1 or X20 NOMIONAL, X20 increases to X40 below 50 Hz
Low Pass Filter:
100 kHz NOMINAL 3 dB point
Channel B Characteristics
Fused input! (Front panel accessible)
Range:
90 to 1000 MHz
Sensitivity:
10 mVrms (-27 dBm) 100-1000 MHz
15 mVrms (-33 dBm) 90-100 MHz
Dynamic Range:
10 mV to 7 Vrms (-27 to +30 dBm)
Coupling:
A C
Impedance:
50 ohm NOMINAL
Attenuator Level:
Manual:
variable from X1 to X18 (0 to 25 dB) NOMINAL
Auto:
AGC mode for improved noise suppression.
