Fixed Coaxial Attenuators
Model 253
High Power, N or SMK Connectors
Conduction Cooled
dc to 6 GHz
550 Watts
RoHS
TEST DATA:
Swept data plots of attenuation and SWR
from 50 MHz to 6 GHz.
CONNECTORS:
Type N connectors per MIL-STD-348
interface dimensions - mate nondestructively with MIL-C-
39012 connectors. SMK (2.92mm) connectors mate with
SMA, 3.5mm and other 2.92mm connectors.
Options
Description
Options Description
1
SMK Female
3
Type N Female
2
SMK Male
4
Type N Male
CONSTRUCTION:
Aluminum alloy body, gold plated
beryllium copper contacts.
WEIGHT:
900 (31.3 oz.) maximum
PHYSICAL DIMENSIONS:
Features
o
o
o
o
Precision Connectors with high temperature
support beads.
Designed to meet environmental requirements of
MIL-DTL-3933.
10 Kilowatts peak, Conduction Cooled
Wireless Applications
- Optimized for use in the
communications bands.
Specifications
NOMINAL IMPEDANCE:
FREQUENCY RANGE:
50
Ω
dc to 6.0 GHz
MAXIMUM DEVIATION OVER FREQUENCY:
Nominal ATTN (dB)
10, 20, 30, 40
MAXIMUM SWR:
Deviation (dB)
+ 1.50
Frequency (GHz)
dc - 2.5
2.5 - 6
SWR
1.10
1.20
3rd ORDER INTERMODULATION (253-XX-XX-LIM
ONLY):
Reflected Levels (IM3), -100 & Through Levels
(IM3), -110 dBc with two input signals @ 869 MHz and 891
MHz with average carrier power levels of +43 dBm each.
POWER RATING:
550 watts
average (unidirectional),
10 kilowatt
peak
(5
μsec
pulse width; 2.5% duty cycle) with
case temperature held within
100 °C maximum
with appro-
priate conductive heat sink. Maximum power into output is
50 Watts
average.
TEMPERATURE COEFFICIENT:
<0.0004 dB/dB/°C
TEMPERATURE RANGE:
-55 to 100°C (case temperature)
Connector
N Male
N Female
DIM A
22.9 (0.90)
15.0 (0.59)
Connector
2.92mm Male
2.92mm Female
DIM A
14.0 (0.55)
12.7 (0.50)
NOTE: All dimensions are given in mm (inches) and are maximum,
unless otherwise specified.
MODEL NUMBER DESCRIPTION:
Example:
253 - XX - XX
-
LIM
IM Option*
Basic
Model
Number
Attenuation
Value (dB)
Connector Options
1st digit is input side
2nd digit is output side
* Add -LIM for Low Intermodulation option.
80
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: 6/19/2013
