With compliments
Helmut Singer Elektronik
www.helmut-singer.de info@helmut-singer.de
Introduction
1
0.01
0.001
0.0001
0.0001
The 11867A offers very low insertion loss and linear operation to minimize its effect on low level (< 0 dBm)
signals passing through it. A typical
application is shown in Figure 2; the
input mixer of a spectrum analyzer is
protected from inadvertent overload
due to high level signals from an
antenna.
RF input
RF output
Max. Max.
continuous pulse
0.1
0.001
0.01
0.1
1
10
100
Input power (watts)
Figure 3. Typical output power vs input power;
T = 25 °C
0
0.25
0.50
Specification limit
0.75
1.00
1.25
0
0.50
1.00
1.5
2.0
2.5
3.0
Frequency (GHz)
Figure 4. Typical insertion loss vs frequency
Specifications
Specifications describe the instrument’s warranted performance over
the temperature range 0 to 55 °C (except where noted). Supplemental
characteristics are intended to provide information useful in applying
the instrument by giving typical, but non-warranted, performance parameters. These are denoted as “typical,” “nominal,” or “approximately.”
Frequency range:
Insertion loss:
Frequency response (flatness):
Figure 1. RF limiter
DC to 1800 MHz
< 0.75 dB
< ±0.25 dB
Note: For operation to 2.4 GHz, see typical response shown
in Figure 4.
Description
The Agilent 11867A RF limiter is a
general purpose diode limiter designed
to provide input protection for a
variety of instruments. For example,
the input circuitry of spectrum analyzers, frequency counters or amplifiers
can be protected from unintentional
inputs as high as 100 watts peak or
10 watts average power. At even greater
power levels, failure mode for the limiter is either an open circuit or a short
circuit to ground, thereby protecting
the instrument from damage.
Impedance:
Reflection coefficient:
Maximum input power levels:
Continuous:
Pulse:
Limiting threshold:
RF input connector:
RF output connector:
Antenna
Limiter
50 ohms, nominal
< 0.1 (1.2 SWR)
10 watts average (+40 dBm)
100 watts peak, pulse width
≤ 1 µsec, 0.001 duty cycle
1 mW (0 dBm) typical
type N female
type N male
Note: Device limited to unilateral operation; i.e., input and
output are not interchangeable.
Weight:
Net 0.09 kg (3 oz);
shipping 0.45 kg (1 lb)
Spectrum analyzer
Figure 2. Typical application
Insertion loss (dB)
Output power (watts)
fon +49 241 155 315
fax +49 241 152 066
Agilent
Feldchen 16-24 D-52070 Aachen Germany
11867 A
RF Limiter, DC to 1800 MHz
Data Sheet
60 (2.38)
21 (0.81)
For more information, please visit our Web site at:
www.agilent.com/find/assist
Note: Dimensions are
in millimeters (and inches).
Figure 5. Dimensions
or call 800 829 4444
Product specifications and descriptions in this
document are subject to change without notice.
© Agilent Technologies, Inc., 2005, 2004, 1979
Printed in USA, March 28, 2005
5952-9295