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Chapter 1: General Information
Specifications & characteristics
1–8
Vertical
Number of Channels 4 (simultaneous acquisition)
Bandwidth Analog Bandwidth (-3dB)* 50Ω: 1.0 GHz — Agilent 54835A
50Ω: 1.5 GHz — Agilent 54845A
50Ω: 2.25 GHz — Agilent 54846A
1 MΩ: 500 MHz (with Agilent 1161A probe)
System Bandwidth Agilent 1161A 10:1 passive probe: 500 MHz
Agilent 1162A 1:1 passive probe: 25 MHz
Agilent 1163A 10:1, 500 Ω passive probe:
1.5 GHz
Agilent 1152A 2.5 GHz, 0.6 pF active probe:
1.3 GHz (Agilent 54845A)
Agilent 1152A 2.5 GHz, 0.6 pF active probe:
1.0 GHz (Agilent 54835A)
Agilent 1153A 200 MHz differential probe:
200 MHz
Real Time bandwidth* 50Ω:
Agilent 54835A — 1 GHz (2-channel mode)
Agilent 54835A — 500 MHz (4-channel mode)
Agilent 54845A — 1.5 GHz (2-channel mode)
Agilent 54845A — 1.0 GHz (4-channel mode)
Agilent 54846A — 2.25 GHz (2-channel mode)
Agilent 54846A — 1.0 GHz (4-channel mode)
1 MΩ: 500 MHz
Rise Time
1
50Ω: 350 ps (Agilent 54835A)
50Ω: 233 ps (Agilent 54845A)
50Ω: 156 ps (Agilent 54846A)
1 MΩ: 700 ps
Sensitivity
2
1 MΩ Coupling: 2 mV/div to 2 V/div
50 Ω Coupling: 2 mV/div to 1 V/div
Input Impedance* 1 MΩ ± 1% (≅12 pf), or 50 Ω ± 1.5%
VSWR (50 Ω) 54835A/45A
dc to 500 MHz: 1.30
500 MHz to 1 GHz: 1.50
1 GHz to 1.5 GHz: 1.75
54846A
dc to 500 MHz: 1.30
500 MHz to 1 GHz: 1.50
1 GHz to 1.5 GHz: 1.75
1.5 GHz to 2.25 GHz: 2.50
Input Coupling dc, ac (7 Hz, available in 1 MΩ only)
Maximum Input Voltage 1 MΩ: ± 100 V (dc + ac) [ac<10 kHz], CAT I
50 Ω: 5 V
rms
, CAT I
Channel-to-channel Isolation
(with channels at equal
sensitivity)
54835A/54845A
dc to 100 MHz: 40 dB
100 MHz to 1 GHz: 30 dB
1 GHz to 1.5 GHz: 25 dB
54846A
dc to 100 MHz: 40 dB
100 MHz to 1 GHz: 30 dB
1 GHz to 2.25 GHz: 24 dB
Offset Range Vertical Sensitivity Available Offset
1 MΩ:
2 mV to 104 mV/div
> 104 mV to 2 V/div
50Ω: all
± 4 V
± 40 V
± 12 div
Full-resolution channel
scales
10, 20, 50, 100, 200, 500, 1000 mV/div (plus 2000 mV/div in 1 MΩ)
Dynamic Range ± 8 div from center screen
dc Gain Accuracy
*2
± 1.00% of full scale at full-resolution channel scale.
Resolution
2
Real Time 8 bits (0.4% of full scale), 12 bits with
sufficient averaging (0.024% of full scale)
Equivalent Time 8 bits (0.4% of full scale), 12 bits with
sufficient averaging (0.024% of full scale)