Fixed Coaxial Attenuators
Model 272
High Reliability, N Connectors
Designed to meet requirements of
MIL-DTL-3933, CLASS III/IV, N/S
CONNECTORS:
Precision Type N connectors per MIL-
STD-348 interface dimensions - mate nondestructively with
MIL-C-39012 connectors.
CONSTRUCTION:
Stainless steel body and connectors;
gold plated beryllium copper contacts.
WEIGHT:
dB VALUE
1 - 10, 20, 30
40
WEIGHT (Net)
70 g (2.6 oz)
100 g (3.6 oz)
dc to 18.0 GHz
2 Watts
Features
o
o
o
o
Rugged injection molded connectors.
Screened (Model 272S) and Non-screened
(Model 272N) designs available.
Available in 1- 10, 20, 30 & 40 dB.
Test Data supplied at additional cost as follows:
Non-screened (N):
Swept data plots of Attenuation
and SWR across the frequency band.
Screened (S):
Swept data plots of Attenuation and
SWR across the frequency band. Film, Standard
data package includes lot record performace showing
pass/fail quantities for all tests and test reports as
applicable.
PHYSICAL DIMENSIONS:.
dB VALUE
1-10, 20, 30
40
DIM A
57.9 (2.28)
68.1 (2.68)
Specifications
NOMINAL IMPEDANCE:
50
Ω
FREQUENCY RANGE:
Nominal ATTN (dB)
1-9
10
20
30, 40
MAXIMUM SWR:
NOTE: All dimensions are given in mm (inches) and are maximum,
unless otherwise specified.
dc to 18.0 GHz
dB
+
+
+
+
0.30
0.40
0.50
0.75
Screening
Units are screened as follows:
"N" versions:
SWR
Attenuation
Peak Power
"S" versions:
Thermal Shock
Monitored Thermal Cycle (MTC)
Attenuation
Conditioning
Peak Power
Attenuation
SWR
Radiographics
MODEL NUMBER DESCRIPTION:
Example:
MAXIMUM DEVIATION OVER FREQUENCY:
Frequency (GHz)
dc - 4
4-8
8 - 12.4
12.4 - 18
SWR
1.12
1.15
1.18
1.20
POWER RATING:
5 watts
average
@ 25°C ambient
temperature, derated linearly to 0.5 watt @ 125°C.
1 kilowatt
peak
(5
μsec
pulse width; 0.25% duty cycle)
POWER COEFFICIENT:
<0.005 dB/dB/Watt
TEMPERATURE COEFFICIENT:
< 0.0004 dB/dB/°C
TEMPERATURE RANGE:
-55°C to +125°C
41a
272N - XX
Basic
Model
Number
Attenuation
Value (dB)
N = Non-screened
S = Screened
5305 Spectrum Drive, Frederick, MD 21703-7362
s
TEL: 301-846-9222, 800-638-2048
s
Fax: 301-846-9116
web: www.aeroflex.com/weinschel
s
email: weinschel-sales@aeroflex.com
Revision Date: 6/3/2014
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