5305 Spectrum Drive, Frederick, MD 21703-7362 TEL: 301-846-9222, 800-638-2048 Fax: 301-846-9116
web: www.weinschel.com email: sales@weinschel.com
141
4/30/02
Specifications
NOMINAL IMPEDANCE: 50 Ω
FREQUENCY RANGE:
dc to 2.0 GHz: 3200T-1, 3200T-2, 3201T-1, 3201T-2,
3205T-1, 3205T-2, 3205T-3, 3206T-1,
3209T-1
dc to 3.0 GHz: 3200T-1E, 3200T-2E, 3201T-1E,
3205T-3E, 3206T-1E, 3209T-1E
Description
Weinschel Corporation SmartStep™ line of intelligent
programmable step attenuators with a built-in digital inter-
face are designed to simplify the control and integration of
these devices into subsystem and bench applications. This
series of Programmable Step Attenuators is designed for
use in automatic test equipment and OEM systems
operating in the dc to 2 GHz frequency range. These
models are available in many standard attenuation ranges
and cell configurations. Each cell contains a standard TO-5
type double-pole, double-throw relay that provides a
minimum loss or attenuated path for the RF signal.
Microstrip circuitry and special compensation techniques
produce flat attenuation versus frequency characteristics.
The microstrip construction, using thick-film circuit
elements, ensures product uniformity. To minimize RF leak-
age, the 3200T Series Attenuators are provided with
gold-plated contact areas and feedthrough filters at each
control terminal.
Model 3200T, 3201T, 3205T, 3206T, 3209T dc to 2.0/3.0 GHz
SmartStep™ Programmable Attenuators 1 Watt
Greatly Simplifies OEM & System Design!
Features
oWidest Selection of Attenuation Ranges and Steps
Sizes
oBuilt-In TTL\CMOS Interface\ SmartStep Driver
Circuitry
oHigh Quality Construction and Connectors
oSpecial Configurations Available Upon Request
- Custom Cell/Step Size Configurations
- 3.0 GHz and Higher Frequencies
Model NO. Attenuation Cell
Number Cells Range/Steps Increments
(dB) (dB)
3200T-1 8 127/1 1, 2, 4, 8, 16, 32, 64*
3200T-1E
3200T-2 8 63.75/0.25 0.25, 0.5, 1, 2, 4, 8,
3200T-2E 16, 32
3201T-1 5 31/1 1, 2, 4, 8, 16
3201T-1E
3201T-2 5 120/10 10, 20, 30, 60**
3205T-1 4 70/10 10, 20, 20, 20
3205T-2 4 55/5 5, 10, 20, 20
3205T-3 4 1.5/0.1 0.1, 0.2, 0.4, 0.8
3205T-3E
3206T-1 6 63/1 1, 2, 4, 8, 16, 32
3206T-1E
3209T-1 10 64.5/0.1 0.1, 0.2, 0.4, 0.8, 1,
3209T-1E 2, 4, 8, 16, 32
*64 dB cell comprised of two 32 dB cells
**60 dB cell comprised of two 30 dB cells
CELL CONFIGURATIONS:
INCREMENTAL ATTENUATION ACCURACY:
Frequency Accuracy
Range (GHz)
dc - 0.5 + 0.2 dB or 0.5%
0.5 - 1 + 0.2 dB or 1.0%
1 -3 + 0.3 dB or 2.0%
MONOTONICITY: dc to 3.0 GHz
INCREMENTAL TEMPERATURE COEFFICIENT:
30 and 32 dB Cells: 0.00005 dB/dB/°C
All other cells: 0.00002 dB/dB/°C
MAXIMUM SWR:
Freq 3200T-1 3200T-1E 3201T-X 3201T-1E 3209T-1 3209T-1E
Range 3200T-2 3200T-2E 3205T-X 3205T-3E
(GHz) 3206T-X 3206T-1E
dc - 0.2 1.30 1.20 1.25 1.20 1.35 1.35
0.2 - 2 1.25 1.20 1.25 1.20 1.35 1.35
2 - 3 - - - 1.40 - - - 1.30 - - - 1.45
5305 Spectrum Drive, Frederick, MD 21703-7362 TEL: 301-846-9222, 800-638-2048 Fax: 301-846-9116
web: www.weinschel.com email: sales@weinschel.com
142
4/30/02
POWER RATING: 1 watt average to 25°C ambient tem-
perature, derated linearly to 0.25 watt @ 71°C. 50 watts
peak (5 µsec pulse width; 1% duty cycle)
POWER COEFFICIENT: < 0.005 dB/dB/watt
RATED SWITCH LIFE: 5 million cycles operations per cell
@ 0 dBm
CYCLING RATE: 5 Hz maximum per relay
DRIVER INTERFACE:
Input Supply Voltage: +12.0 to +15. V
Control Signals: TTL/CMOS compatible
Interface Modes: parallel/ I2C serial
DC Characteristics (at 25 °C):
Parameter Specification
VIL Low-level input V: -0.5V min, 0.8V max
VIH High-level input V: 2.0V min, 5.25V max
IPU Pullup current 50 mA min, 400 mA max
VIN Supply Voltage: +12.0 to +15.0V
IIN Supply current: 25 µΑ
(digital section)
ICELL Supply current: 15 mA
(per cell) continuous
TEMPERATURE RANGE (Operating): -20°C to +70°C
CALIBRATION: Test data is available at additional cost.
CONNECTORS: SMA female connectors per MIL-STD-348
interface dimensions - mate nondestructively with
MIL-C-39012 connectors.
INTERFACE CONNECTOR: 14 pin .025 square post
header on .1 center. Mates with Amp connector 746285-2 or
equivalent.
CONSTRUCTION:
Housing: Aluminum
Connectors: Stainless steel body and beryllium
copper contacts.
WEIGHT: 3200T-X 165 g (8.4 oz)
3201T-X 132 g (7.3 oz)
3205T-X 132 g (7.3 oz)
3206T-X 132 g (7.3 oz)
3209T-X 218 g (9.7 oz)
ACCESSORIES
SmartStep Interface: The Model 8210A SmartStep
Interface provides a flexible, low cost solution for the oper-
ation of programmable step attenuators and other
electromechanical devices under computer control.
Designed to interface to Weinschel's new line of SmartStep
programmable attenuators, the 8210A represents a new
concept in device control applications for bench test and
subsystem designs. The 8210A provides a high-level inter-
face from various industry standard communications
interfaces, including IEEE-488 and RS232/RS422/RS485,
to the SmartStep's serial Driver Interface Bus.
CONTROL CONFIGURATION:
The SmartStep attenuators feature an internal microcon-
troller-based driver that provides a TTL-level digital
interface for control of the attenuator relays. This card sim-
plifies operation and interfacing requirements, while at the
same time providing for greatly enhanced flexability over
past designs. User-selectable modes of operation include
both parallel and serial I2C bus. The parallel mode provides
a simple, one-bit per relay on/off control with internal pullups
for use primarily in single attenuator applications. This mode
allows the attenuator to be controlled via a variety of meth-
ods, such as a TTL-level digital output port, or mechanical
toggle switches. The I2C mode provides a two-wire serial
bus structure and protocol for connecting a number of
devices to a single host control interface, suitable for use in
larger system and sub-system applications. The SmartStep
contains non-volatile configuration memory that is used to
hold a wide variety of attenuator and driver-dependant para-
meters, including serial number, attenuator cell dB values,
relay configurations, and switching requirements, which are
all accessable via the I2C interface.
In either operational mode, the microcontroller enters an
idle condition during periods of inactivity, turning off all
on-board clocks, reducing EMI concerns, and lowering
power consumption. On-board regulation for the digital
circuitry allows the SmartStep to operate from a single input
supply voltage.
Specifications - Con’t
MAXIMUM INSERTION LOSS (dB):
Frequency 3200T-1 3200T-1E 3201-1 3205T-X 3201T-1E 3206T-1 3206T-1E 3209T-1 3209T-1E
Range (GHz) 3200T-2 3200T-2E 3201-2 3205T-3E
dc - 0.5 2.80 2.00 1.80 1.80 1.25 2.00 1.50 3.50 3.00
0.5 - 1.0 3.50 2.70 2.40 2.30 1.75 2.70 2.00 4.50 3.50
1.0 - 1.5 4.25 3.00 3.00 2.80 2.25 3.30 2.50 5.60 4.00
1.5 - 2.0 4.75 3.50 3.75 3.30 2.50 4.00 2.80 6.70 4.50
2.0-3.0 - - - 4.30 - - - - - - 3.40 - - - 3.70 - - - 5.50
5305 Spectrum Drive, Frederick, MD 21703-7362 TEL: 301-846-9222, 800-638-2048 Fax: 301-846-9116
web: www.weinschel.com email: sales@weinschel.com
143
4/30/02
PHYSICAL DIMENSIONS:
"D"
NOTE: All dimensions are given in mm (inches) and are maximum, unless otherwise specified.
Model No. No. Cells A B C D
3200T-X 8 101.6 (4.0 34.8 (1.37) 88.9 (3.50) 95.2 (3.75)
3201T-X 5/4 76.2 (3.00) 22.1 (0.87) 63.5 (2.50) 69.8 (2.75)
3205T-X 4 72.4 (2.85) 22.1 (0.87) 46.2 (1.82) 52.6 (2.07)
3206T-X 6 81. 3+0.5 24.0 (0.98) 68.6 (2.70) 75.18 (2.96)
(3.20+0.02
Model 3200T, 3201T, 3205T, & 3206T:
Model 3209T:
