High-Performance VXI
Universal Counter
Agilent E1420B
Data Sheet
•
1-Slot, C-size, message based
•
200 MHz frequency range, optional 2.5 GHz channel
•
9-digit resolution in 1 second gate time
•
2 ns time interval resolution (200 ps with averaging)
•
Shared memory option configuration
•
Phase measurement and measurement timeout
Description
The Agilent Technologies E1420B High-Performance
Universal Counter is a C-size, 1-slot, message-based VXI
module. It provides the full set of traditional universal
counter measurements (frequency, period, time interval,
totalize, and ratio), plus the automatic measurements of
rise/fall time, pulse width, phase, and ac/dc voltages.
Additionally, this module provides x10 attenuation, allowing
measurements of higher-powered signals.
Agilent E1420B
The E1420B is ideal for today’s ATE applications requiring
high speed in all phases of a measurement — setup, measure,
and output. It can make up to 60 measurements per second
of the same function. It can also sequence through a series
of different functions at up to 40 measurements per second.
For even faster measurements, the optional shared memory
capability yields up to 160 measurements per second. This
shared RAM option allows the E1420B to send measurement
data to a VXI device with shared RAM. Data may be
accessed by the controller, thus eliminating data formatting
time and providing higher measurement throughput.
The E1420B features the industry standard SCPI interface
language. SCPI will let you develop code that can easily be
leveraged, increase the life of test software, and decrease
the time spent learning new instrument languages.
Refer to the Agilent Technologies Website for instrument
driver availability and downloading instructions, as well as
for recent product updates, if applicable.
Outstanding Resolution and Range
The E1420B offers a 200 MHz frequency range (2.5 GHz with
option 030) and 2 ns time interval resolution (200 ps with
averaging). Rise and fall times can be measured
automatically down to 15 ns.
Improve the System Clock Without Sacrificing Mainframe
Space
An optional highly stable TCXO time-base is available for
the E1420B. By externally driving the VXI system clock
(CLK10) with this TCXO, you can substantially reduce
system clock errors without losing valuable mainframe
slots. This option improves measurement repeatability and
accuracy.
Measurement Timing Control
For synchronizing your measurement to an external event,
such as an RF burst, VXIbus and external triggering are
available.
Programmable measurement time-outs help you optimize
system performance even if the input signal is absent.
Single Measurement Auto-Trigger Speeds Measurements
Repetitive auto-trigger measurements are faster than ever
with the E1420B’s single measurement auto-trigger. This
feature analyzes the input signal only once, setting the
trigger levels, and speeding through the rest of the
measurements.
Adjustable Sensitivity
Measuring low-level signals isn’t a problem: the
Agilent E1420B features 35 mV rms sensitivity to 200 MHz.
When noise is a problem, this sensitivity can be decreased to
100 mV rms by using hysteresis control.
Optional 2.5 GHz Channel (Input 3)
Increase your frequency range to 2.5 GHz for
communications and navigation applications.
Save on Software Costs with SCPI
The E1420B features the industry standard SCPI interface
language. SCPI will let you develop code that can easily be
leveraged, increase the life of test software, and decrease
the time spent learning new instrument languages. SCPI
also simplifies the use of the counter; for example, you can
set a trigger level using a percentage of signal amplitude.
Option 100
Option 100 is a mandatory no-cost option that must be
ordered with the E1420B. Option 100 reduces the maximum
TI Delay range from 99.999 seconds to 1 second.
Product Specifications
Functions
Period: Yes
Time interval: Yes
Totalize: Yes
Gated totalize: Yes
Ratio: Yes
Pulse width: Yes
Rise/fall time: Yes
Phase: Yes
Vdc: Yes
Vac: Yes
Up/down counter: No
Measurements
Frequency: 200 MHz (standard) 2.5 GHz (with
Frequency 1, 2, 3:
Range: 0.001 Hz to 200 MHz, input 1;
Resolution: 9 digits/s of measurement time +
Period 1, 2, 3:
Range: 5 ns to 1,000 s, input 1;
Resolution: Same as Frequency
Time interval (TI) 1 to 2:
Range: 1 ns to 1,000 s
Resolution: 2 ns + trigger error, single-shot;
Rise/fall time 1:*
Range: 15 ns to 400 µsec
Resolution: Same as TI
Pulse width 1, 2:*
Range: 5 ns to 1 ms
Resolution: Same as TI
Phase 1 relative 2:*
Range: 0.1° to 360°
Resolution: TI resolution x frequency x 360°
Ratio 1/2, 2/1, 3/1:
Range (1/2, 2/1): 0.001 Hz to 100 MHz
Range (3/1): 90 MHz to 2.5 GHz (Optional)
Totalize 1, 1 by 2, 2 by 1:
Range: 0 to (1 x 1.0E12 - 1) events
Min/max, ac voltage 1, 2:*
Range: 200 mVp-p to 5 Vp-p
Resolution: 30 mV
Min/max, dc voltage 1:
Range: 30 mV to ±10 V
Resolution: 30 mV
*Frequency range 1 kHz to 20 MHz.
option)
0.001 Hz to 100 MHz, input 2;
90 MHz to 2.5 GHz, input 3 (Optional)
trigger error + system jitter
(Frequency resolution is directly
proportional to gate time. For
example, resolution is 9 digits for a
1-second gate time and 8 digits for a
0.1-second gate time.)
10 ns to 1000 s, input 2;
400 ps to 10 ns, input 3 (Optional)
1 ns to 10 s
average)
200 ps + trigger error, averaging
sec
(manual)
(single-shot);
(averaging) (100-gate
(automatic)
(x Atten.)
(x Atten.)
(x Atten.)
; to 800
(x Atten.)
2
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