API Weinschel 420 Series Manuale utente

MANUAL IM672

Operation & Installation Manual Revision C

Operation and Installation Manual

Model 420X Series

Digital Attenuators

This documentation may not be reproduced in any form, for

any purpose unless authorized in writing by Weinschel, a

part of API Technologies Corp.

MANUAL IM672 
Table of Contents Page 2 
Table of Contents 
Table of Contents............................................................................................................................................2 
Safety Summary .........................................................................................................................................4 
1. Definitions ............................................................................................................................................4 
2. Detailed Precautions..............................................................................................................................4 
3. Electrostatic Discharge Sensitive (ESDS) .................................................................................................4 
General Information ....................................................................................................................................5 
1. Purpose ................................................................................................................................................5 
2. Equipment Overview .............................................................................................................................5 
Specifications..............................................................................................................................................5 
1. Electrical Specifications..........................................................................................................................5 
2. Timing Specifications .............................................................................................................................5 
3. 420X Series modules .............................................................................................................................6 
4. DC Power Input ....................................................................................................................................8 
Installation and Operation ...........................................................................................................................8 
1. Mounting ..............................................................................................................................................8 
2. RF Connectors & Cable Installation.........................................................................................................8 
3. Control Connectors................................................................................................................................8 
3.1 AUX mode digital IO (10-pin 0.1” Header)..........................................................................................8 
3.2 USB Mini-B.......................................................................................................................................9 
4. USB/AUX Mode Interface Selection.........................................................................................................9 
5. AUX Interface Modes...........................................................................................................................10 
5.1 AUX Modes ....................................................................................................................................10 
5.2 PIO Mode.......................................................................................................................................10 
5.3 SPI Mode .......................................................................................................................................10 
5.4 I2C Mode .......................................................................................................................................10 
5.5 SPI and I2C Attenuation Data Format ..............................................................................................11 
5.6 UART Mode....................................................................................................................................14 
6. AUX Application Modes ........................................................................................................................14 
6.1 PIOSW Mode..................................................................................................................................14 
6.2 PULSE Mode...................................................................................................................................14 
6.3 FADE Mode ....................................................................................................................................15 
6.4 USB Mode AUX pin usage................................................................................................................16 
6.5 USB ...............................................................................................................................................16 
Command Operation .................................................................................................................................17 
1. Command Reference ...........................................................................................................................18 
2. Application Specific Commands ............................................................................................................18 
ATTN ..................................................................................................................................................18 
ATTN?.................................................................................................................................................19 
STEPSIZE ............................................................................................................................................19 
STEPSIZE? ..........................................................................................................................................19 
INCR...................................................................................................................................................19 
DECR ..................................................................................................................................................19 
FADE...................................................................................................................................................20 
FADE? .................................................................................................................................................20 

MANUAL IM672 
Table of Contents Page 3 
5.3. 488.2 Common Commands ..................................................................................................................20 
*CLS ...................................................................................................................................................20 
*IDN? .................................................................................................................................................20 
*OPC?.................................................................................................................................................21 
*ESR? .................................................................................................................................................21 
*RST...................................................................................................................................................21 
*TST? .................................................................................................................................................21 
ERR?...................................................................................................................................................21 
5.4. Setup and Configuration Commands.....................................................................................................22 
SET AUX..............................................................................................................................................22 
SET USB..............................................................................................................................................22 
SET ALIAS ...........................................................................................................................................22 
SET BAUDRATE ...................................................................................................................................23 
SET ATTN............................................................................................................................................23 
SET I2CADDR ......................................................................................................................................23 
SET I2CTRIG .......................................................................................................................................23 
SET WPU.............................................................................................................................................23 
SET PULSE ..........................................................................................................................................24 
SET FADE............................................................................................................................................24 
RUN AUX.............................................................................................................................................24 
SHOW SET ..........................................................................................................................................25 
SHOW VERSION ..................................................................................................................................25 
FACTORY PRESET ................................................................................................................................25 
5.5. Misc. Commands .................................................................................................................................26 
ALIAS? ................................................................................................................................................26 
ATTNIO...............................................................................................................................................26 
ATTNIO? .............................................................................................................................................26 
CONSOLE ............................................................................................................................................26 
CONSOLE? ..........................................................................................................................................27 
DELAY.................................................................................................................................................27 
REBOOT..............................................................................................................................................27 
REPEAT...............................................................................................................................................27 
RFCONFIG? .........................................................................................................................................28 
RUN LOADER.......................................................................................................................................28 
SYSTEST .............................................................................................................................................28 
6. USB Driver Installation ..............................................................................................................................30 
6.1. awusbcdc.inf Installation File ...............................................................................................................33 
6.2. Updating the 420X Firmware using USB HID Bootloader ........................................................................35 
6.2.1 Method 1 .......................................................................................................................................36 
6.2.2 Method 2 .......................................................................................................................................36 
7. Factory Service and Repairs .......................................................................................................................40 
8. Contacting Weinschel ................................................................................................................................41 
8.1. Manufacturer Warranty........................................................................................................................41 
9. Revision History ........................................................................................................................................42 
 

MANUAL IM672

Safety Summary Page 4

1. Safety Summary

1.1. Definitions

The following definitions apply to WARNINGS, CAUTIONS, and NOTICES may found throughout this manual.

WARNING: An operating or maintenance procedure, practice, statement, condition, etc., which, if not strictly

observed, could result in injury and/or death of personnel. Do not proceed beyond a WARNING symbol until all the

indicated conditions have been fully understood and/or met.

CAUTION: An operating or maintenance procedure, practice, statement, condition, etc., which, if not strictly

observed, could result in damage or destruction of the equipment or long-term health hazards to personnel. Do not

proceed beyond a CAUTION symbol until all the indicated conditions have been fully understood and/or met.

NOTICE: An essential operating or maintenance procedure, condition, or statement that must be highlighted.

1.2. Detailed Precautions

The following WARNINGS, CAUTIONS and NOTES appear throughout the text of this manual and are repeated

here for emphasis.

All procedures and/or steps identified as must be followed exactly as written and according to

industry accepted ESDS device handling procedures. Failure to comply may result in ESD

damage.

1.3. Electrostatic Discharge Sensitive (ESDS)

The equipment documented in this manual contains certain Electrostatic Discharge Sensitive (ESDS) components

or parts. Therefore, certain procedures/steps are identified by the use of the symbol . This symbol is used in

two ways:

When the ESDS symbol is placed between a paragraph and title, that paragraph, including all

subparagraphs, is considered ESDS device handling procedure.

When the ESDS symbol is placed between a procedure/step number and the text, all of that procedure is

considered an ESDS device handling procedure.

All procedures and/or steps identified as ESDS must be followed exactly as written and according to accepted ESDS

device handling procedures. Failure to comply may result in ESDS damage

MANUAL IM672

General Information Page 5

2. General Information

2.1. Purpose

This manual contains setup and operation information for the Weinschel Model 420X series, Solid State

Programmable Attenuators. This manual is to be used in conjunction with the operation and installation of the

Model 420X Series. The manual also provides a description of the assembly and general maintenance procedures.

2.2. Equipment Overview

The 420X series Solid State Programmable Attenuators provide for control via either USB or a variety of digital

interfaces through the AUX mode connector, including parallel input (PIO), I2C, SPI, or a logic-level UART interface.

AUX mode selection is done via a USB command and can be changed by the user.

3. Specifications

The electrical and timing specifications of model 420X are listed below. Refer to appropriate ICD drawings for more

specifications about each module.

3.1. Electrical Specifications

Parameter

Min

Typical

Max

Comments

DC Power (AUX pin 9)

VDC Supply Voltage

3.3V

16V

Supply voltage 3.5V MIN for full spec

compliance

IDC Supply Current (VDC=5V)

15mA

25mA

AUX IO

Note: All AUX IO have weak pullups enabled by default

VIH Input High Voltage

VDC= 3.3V to 4.5V

VDC= 4.5V to 16V

2.0V

VDC+0.3

2.0V

5.0V

VIL Input Low Voltage

VDC= 3.3V to 4.5V

VDC= 4.5V to 16V

-0.3V

0.15VDC

-0.3V

0.8V

VOH Output High Voltage

2.6V

ILOAD = 3mA

VOL Output Low Voltage

0.6V

ILOAD = 3mA

IPU Pullup Current

25uA

130uA

300uA

User selectable

USB

USB Supply Voltage (VBUS)

4.4V

5.25V

D+/D- Input Voltage

3.6V

3.2. Timing Specifications

Parameter

Min

Typ

Max

Comments

General

RF switching speed

Model 4205A

400ns

Model 4209

35ns

10% RF to 90% RF

Model 4204

1µs

10% RF to 90% RF

Power up time

50ms

DC power to first command

Attenuation update rate

Model 4205A

200KHz

Model 4209

100KHz

Command processing time

2ms

USB mode

PIO mode

MANUAL IM672

Specifications Page 6

Parameter

Min

Typ

Max

Comments

PIO input change to RF

change

Model 4205A

3µs

5µs

Model 4209

3µs

10µs

Model 4204

8µs

50% CTRL to 90% RF

PIOSW input change to RF

Model 4205A

1µs

Single line input

Model 4209

5µs

Single line input

SPI mode

SCLK clock frequency

10MHz

SSN setup/hold time

100ns

SSN falling/rising edge to SCLK

SDI data setup time

25ns

SDI to SCLK rising edge

I2C mode

SCL clock frequency

400KHz

RESETN width

10µs

RESETN low pulse width (optional)

TRIG

1µs

TRIG input, rising/falling edge

(optional)

UART mode

Baud rate

9600

115K

3.3. 420X Series modules

Figure-1 shows the 4205A series module.

Figure-1: 4205A Series attenuator

MANUAL IM672

Specifications Page 7

Figure-2 shows the 4209 series module.

Figure-2:4209 Series Attenuator

Figure-3 shows the 4204 series module.

Figure-3: 4204 Series Attenuator

MANUAL IM672

Installation and Operation Page 8

3.4. DC Power Input

The 420X series attenuators can be powered from either the USB VBUS (5V) or the AUX VDC input. While USB

operates at a nominal 4.75V-5.25V range, the AUX VDC supply input can accept a wider range of voltage, from

3.3V-16VDC. If both AUX power and USB VBUS are present then the device will be powered from whichever provides

the higher voltage. For AUX VDC voltages < 5V the input logic signals are limited to the VDC supply voltage.

Otherwise, input logic signals are limited to a max voltage of 5V.

4. Installation and Operation

4.1. Mounting

The 420X Attenuator is supplied with 12 mounting holes. Refer to the appropriate Weinschel Specification/ICD

drawing for the mounting hole dimensions and locations.

When applying a signal to the RF connectors, DO NOT exceed the maximum allowable power

level specifications of the unit.

Do not over torque the SMA connectors more than 10 inch pounds. Damage may occur.

4.2. RF Connectors & Cable Installation

The Model 4205A series contains two SMA female connectors labeled J1 and J2 that mate nondestructively with

SMA male connectors per MIL-STD-39012. The Model 4209 series modules are available with 2.92 mm, 2.4 mm,

or SMA female connectors and the 4204 series module generally comes with type F 75Ω female connectors. Refer

to appropriate ICD to determine the type of connectors for a given part number. Weinschel recommends a torque

value of 7 to 8 inch pounds when connecting any cable to the attenuator's RF connectors.

4.3. Control Connectors

4.3.1 AUX mode digital IO (10-pin 0.1” Header)

A variety of control interfaces can be used with the AUX Connector. Options include Parallel IO, I2C, SPI, UART,

and USB. The SET AUX command allows the user to select the control interface for the AUX Connector. The table

below describes the pinouts for the various control modes.

4205A and 4 204 Series

SIGNAL

PIO

I2C

SPI

UART

USB

4205A-31.5

4205A-63.5

4205A-95.5*

& 4204-95.5

4205A-

127*

0.25dB

0.5dB

1dB

MANUAL IM672

Installation and Operation Page 9

4205A and 4 204 Series

SIGNAL

PIO

I2C

SPI

UART

USB

4205A-31.5

4205A-63.5

4205A-95.5*

& 4204-95.5

4205A-

127*

1dB

2dB

RXD

2dB

4dB

TXD

4dB

8dB

TRIG

SSN

8dB

16dB

RESETN

SCLK

16dB

32dB

SCL

SDI

32dB

64dB

SDA

BOOTN

VDC

GND

*0.25dB accessible in serial or USB modes

4209 Series

SIGNAL

PIO

I2C

SPI

UART

USB

4209-31.5

4209-63

4209-94.5

0.5dB

1dB

2dB

RXD

4dB

TXD

8dB

TRIG

SSN

16dB

RESETN

SCLK

32dB

SCL

SDI

32dB

SDA

BOOTN

VDC

GND

4.3.2 USB Mini-B

The table below describes the pinouts of the USB connector.

SIGNAL

DESCRIPTION

VBUS

+5V

D-

Data-

D+

Data+

unused

GND

Ground

4.4. USB/AUX Mode Interface Selection

The main operating mode of the 420X is determined from the DC Power input. At power on the USB connector

VBUS pin is examined, and if detected then the unit will operate in USB mode. Otherwise the UUT will operate in

one of the digital AUX modes powered via the AUX VDC power input. It is allowable to have both cables connected

at the same time.

If an AUX mode is currently active the unit will detect a USB connect event and switch over to USB mode

automatically.

Typically you would return to AUX mode by disconnecting the USB cable (or removing USB power). The USB

command RUN AUX also allows switching from USB mode to an AUX mode via command, and does not require the

MANUAL IM672

Installation and Operation Page 10

AUX connector VDC power to be present. This is usefully in certain AUX application modes (see PULSE and FADE

modes).

4.5. AUX Interface Modes

4.5.1 AUX Modes

There are four user-selectable digital interface AUX modes: PIO, I2C, SPI, and UART. In addition there are three

AUX application modes (PIOSW, PULSE, and FADE) that allow the generation of RF patterns when operating stand-

alone. The AUX mode selection is done via USB command (see SET AUX) and is stored in non-volatile memory

(NVM) so that changes to the mode will be automatically applied at startup. The AUX digital interface pins vary in

function depending on the selected mode. Each pin can have a software programmable weak pullup assigned,

which is enabled by default for all pins (see SET WPU). The weak pullup will provide a logic high to the pin if left

unconnected.

4.5.2 PIO Mode

In PIO mode there are up to eight parallel digital input signals, D0-D7. Each input represents a dB value setting,

with a logic low input = 0dB setting and a logic high = dB value for each control input as shown in the PIO column

of the J1 AUX mode table.

4.5.3 SPI Mode

SPI mode is a serial interface that operates as a 16-bit serial-in shift register and latch comprised of three signals:

SSN low-active chip select, SCLK serial shift clock, and SDI serial data in. Data present on the SDI input is clocked

into the shift register on the rising edge of SCLK. Data is comprised of a single 8-bit value for the 31.5dB, 63.5dB

models along with model 4209-95.5 dB. Data is comprised of 16-bits, organized into two bytes, for the 4205A-

95.5dB and 4205A-127dB models which provides access to the 9th 0.25dB bit. Serial data is clocked in MSB first to

LSB and must be in multiples of 8-bits. SSN must be asserted low before sending data to the attenuator, allowing

multiple attenuators to be controlled via the same SCLK and SDI signals. Attenuation changes are updated on the

rising edge of SSN after all data bits have been clocked in.

Note that all models will accept 16-bits of programming data. The data should be left-justified in the 16-bit word

so that the MSB is the first bit sent and any unused bits should be set to 0. The first byte represents the D7-D0

values shown in the PIO mode table. The first bit of the second byte ('D-1') represents the 0.25dB value for the

4205A-95.5 and 4205A-127. Refer to the Attenuation Data Format section for examples on formatting 16-bit data.

D7 D6 D5 D4 D3 D2 D1 D0

SSN

SCLK

SDI D-1 D-2 0 0 0 0 0 0

MSB LSB OPTIONAL 2ND BYTE

(0.25dB FOR 4205A-95.5)

4.5.4 I2C Mode

I2C mode is a serial interface that uses two lines: SCL serial clock and SDA serial data, along with the optional

controls RESETN, TRIG, and address bits A3-A0. Both the SCL and SDA connections are bidirectional open-drain

lines, each requiring pull-up resistors to the logic supply voltage (5V max).

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