Fixed Coaxial Attenuators
Model 274
High Reliability, SMA Connectors
Designed to meet requirements of
MIL-DTL-3933, CLASS III/IV, N/S
CONNECTORS:
SMA connectors per MIL-STD-348 inter-
face dimensions - mate nondestructively with MIL-C-39012
connectors.
CONSTRUCTION:
Passivated stainless steel body and
connectors; gold plated beryllium copper contacts.
dc to 18.0 GHz
2 Watts
Features
o
o
o
o
Rugged injection molded connectors.
Screened (Model 274S) and Non-screened
(Model 274N) designs available.
Available in 0 - 20 in 0.5 dB steps, 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.
WEIGHT:
dB VALUE
0 - 20
30, 40
WEIGHT (Net)
10 g (0.35 oz)
20 g (0.70 oz)
PHYSICAL DIMENSIONS:
Specifications
NOMINAL IMPEDANCE:
50
Ω
FREQUENCY RANGE:
dc to 18.0 GHz
dB VALUE
0 -10, 20
30, 40
DIM A + 0.5 (0.02)
STD
Prefix F
Prefix M
30.5 (1.20) 29.7 (1.17)
32.3 (1.27)
47.0 (1.85) 46.2 (1.82)
47.7 (1.88)
NOTE: All dimensions are given in mm (inches) and are maximum,
unless otherwise specified.
MAXIMUM DEVIATION OVER FREQUENCY:
Nominal ATTN (dB)
0-2
3 -6
7 - 12
20
30, 40
MAXIMUM SWR:
dB
+
+
+
+
+
0.50
0.30
0.50
0.70
1.00
Screening
Units are screened as follows:
"N" versions:
SWR
Attenuation
Peak Power
"S" versions:
Thermal Shock
Monitored Thermal Cycle (MTC)
Attenuation w/Parts Assembly Verification (PAV)
Conditioning
Peak Power
Attenuation
SWR
Radiographics
MODEL NUMBER DESCRIPTION:
Example:
Frequency (GHz)
dc - 4
4-8
8 - 12.4
12.4 - 18
SWR
1.15
1.20
1.25
1.35
POWER RATING:
2 watts
average
to 25°C ambient
temperature, derated linearly to 0.5 watts at 125°C.
500 watts
peak
(5
μsec
pulse width; 0.2% duty cycle).
POWER COEFFICIENT:
< 0.005 dB/dB/watts
TEMPERATURE COEFFICIENT:
< 0.0004 dB/dB/°C
TEMPERATURE RANGE:
-55°C to +125°C
274N - XX
Basic
Model
Number
Attenuation
Value (dB)
N = Non-screened
S = Screened
41c
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: 1/27/2014
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