Model 115A thru 119A
Manual Step Attenuators
Choice of Type N, TNC, SMA Connector
dc to 18.0 GHz
2 Watt
Specifications
NOMINAL IMPEDANCE:
50
Ω
FREQUENCY RANGE (add Model No. Prefix to
Designate Range):
All Models:
dc to 4.0 GHz (AC)
dc to 18.0 GHz (AF)*
*dc to 16.0 GHz for TNC connector
STANDARD INCREMENTAL ATTENUATION RANGE:
Model 115A:
0 to 9 dB in 1 dB steps
Model 116A:
0 to 60 dB in 10 dB steps
Model 117A:
0 to 69 dB in 1 dB steps
Model 118A:
0 to 90 dB in 10 dB steps
Model 119A:
0 to 99 dB in 1 dB steps
MAXIMUM SWR (Models 117A & 119A):
Frequency
Range (GHz)
dc - 4
dc - 18
SMA, N
1.35
1.70
TNC
1.35
1.70
Features
o
Safety Mechanical Stop
- A mechanical stop between
maximum and 0 attenuation positions on all models
prevents damage to the mechanical drive as well as
preventing large power changes that could cause dam-
age to sensitive equipment.
o
Choice of Attenuation Ranges
- Five standard atten-
uation ranges are available: 0-9 dB, 0-69 dB, and 0-99
dB in 1 dB steps, and 0-60 dB and 0-90 dB in 10 dB
steps.
o
Broadband
- All models are available in a choice of 3
frequency ranges: dc-4, dc-12.4, and dc-18 GHz (dc-16
for units with TNC connector).
o
Right-Angle Drive
- The center conductor of the con-
nector is perpendicular to the control shaft, offering
greater flexibility of applications: panel mounting or
bench setup. All models are bidirectional.
o
Custom Configurations Available Upon Request.
o
Low Deviation from Nominal Value
- These Mini Step
Attenuators have flat frequency response over speci-
fied bands and excellent attenuation accuracy.
Deviation from nominal value is low at all settings.
o
Excellent Repeatability and Long Life Switch
-
Repeatability is better than 0.05 dB to 18.0 GHz for
over 1,000,000 switchings of the drum.
MAXIMUM SWR (Models 115A, 116A, & 118A):
Frequency
Range (GHz)
dc - 4
dc - 18
SMA, N
1.25
1.60
TNC
1.30
1.60
Description
The Weinschel Corporation Models 115A through 119A are
a series of broadband, step attenuators in a right-angle
drive configuration, where the center conductor of the con-
nector is perpendicular to the control shaft. They feature
excellent performance characteristics suitable for use in
high reliability 50 ohm systems and applications requiring
extra-small components for the precision control of power in
discrete steps. They can be used either as input or output
attenuators in signal sources, receivers, field strength
meters, spectrum analyzers, etc.
POWER RATING:
2 watts
average
to 25°C ambient
temperature, derated linearly to 1 watt @ 54°C. 200 watts
peak
(5
µsec
pulse width; 0.5% duty cycle)
POWER COEFFICIENT:
< 0.005/dB/dB/watt
TEMPERATURE COEFFICIENT:
< 0.0004/dB/dB/°C
TEMPERATURE RANGE:
Operating:
0°C to +54°C
Nonoperating: -54°C to +54°C
INCREMENTAL PHASE SHIFT:
~0.5° per dB x f(GHz)
REPEATABILITY:
Better than 0.05 dB across frequency
band for switch life.
SWITCH LIFE:
Over 1,000,000 steps
INDEXING:
36°
5305 Spectrum Drive, Frederick, MD 21703-7362 TEL: 301-846-9222, 800-638-2048
web: www.weinschel.com email: sales@weinschel.com
Fax: 301-846-9116
4/30/02
119
Specifications (Con’t):
MAXIMUM INSERTION LOSS (dB):
Model
Number
115A
116A
117A
118A
119A
CONN
Type
N
SMA/TNC
N
SMA/TNC
N
SMA/TNC
N
SMA/TNC
N
SMA/TNC
Frequency Range (GHz)
dc-4
4-8
8-12.4 dc-18*
0.3
0.3
0.3
0.4
0.5
0.6
0.4
0.5
0.5
0.6
0.4
0.5
0.4
0.5
0.7
0.8
0.5
0.6
0.7
0.8
0.5
0.7
0.5
0.7
0.9
1.0
0.6
0.7
0.9
1.0
0.7
1.0
0.7
1.0
1.2
1.5
0.8
1.0
1.2
1.5
INCREMENTAL INSERTION LOSS (+dB):
Model
Number
115A
117A
dB
Range
1-9
1-9
10-19
20-29
30-39
40-49
50-59
60-69
1-9
10-19
20-29
30-39
40-49
50-59
60-69
70-79
80-89
90-99
10
20
30
40
50
60
10
20
30
40
50
60
70
80
90
Frequency Range (GHz)
dc-4
dc-18*
0.3
0.3
0.7
0.9
1.0
1.1
1.2
1.3
0.3
0.7
0.9
1.0
1.1
1.2
1.3
1.4
1.5
1.6
0.3
0.3
0.4
0.5
0.7
0.8
0.3
0.3
0.4
0.5
0.7
0.8
0.9
1.0
1.2
0.5
0.5
1.0
1.2
1.4
1.5
1.7
1.9
0.5
1.0
1.2
1.4
1.5
1.7
1.9
2.1
2.3
2.5
1.0
1.0
1.0
1.2
1.5
1.8
1.0
1.0
1.0
1.2
1.5
1.8
2.1
2.3
2.5
119A
*dc-16.0 GHz for TNC connector
CALIBRATION:
Insertion Loss data is supplied as follows.
Other test data can be supplied at additional cost.
dc to 4 GHz:
At 50 MHz and 4 GHz
dc to 18 GHz:
At 50 MHz, 4, 8, 12 and 18 GHz*
*dc-16.0 GHz with TNC units.
RELATIVE HUMIDITY:
95%
ALTITUDE:
to 10,000 ft.
SHOCK (non-operating):
8 g's, 100 ms, 1/2 sine
DRUM CONFIGURATIONS:
Single Drum:
115A, 116A, 118A
Dual Drum:
117A, 119A
VIBRATION (non-operating):
5 to 8 cps, 0.20 inch double amplitude
8 to 15 cps, 0.10 inch double amplitude
15 to 55 cps, 0.36 inch double amplitude
Supported rigidly front and back
SHAFT ROTATION:
Clockwise for increasing attenuation
CONSTRUCTION:
Materials:
Housing: aluminum alloy, clear irridite,
MIL-C-5541.
Dust Cover: Painted aluminum alloy
Drum:
Aluminum alloy
Shaft:
Passivated stainless steel
Connector:
Stainless steel and beryllium
copper contacts.
CONNECTOR:
SMA connector per MIL-STD-348 interface
dimensions - mate nondestructively with MIL-C-39012 con-
nector. Front and rear SMA connector available in either
standard or right-angle configuration, connector sex is
optional as follows:
Connector Options
Type/Description
1
SMA, Female
2
SMA, Male
3
Type N, Female
4
Type N, Male
6
TNC, Female
7
TNC, Male
116A
118A
*dc to 16.0 GHz for TNC connector
WEIGHT:
115A
116A
117A
118A
119A
340
340
760
450
880
g
g
g
g
g
(12
(12
(27
(16
(31
oz)
oz)
oz)
oz)
oz)
MODEL NUMBER DESCRIPTION:
Example:
AC116A - XX - XX
Frequency
Range
(GHz)
Basic
Model
Number
Maximum
Attenuation
Value (dB)
Connector Options*
1st digit is J1 side (front)
2nd digit is J2 side (rear)
120
4/30/02
5305 Spectrum Drive, Frederick, MD 21703-7362 TEL: 301-846-9222, 800-638-2048
web: www.weinschel.com email: sales@weinschel.com
Fax: 301-846-9116
Circuit Observation Room
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