Api technologies corp. 4205A Series Technisches Datenblatt

MANUAL IM672

Operation and Installation Manual Revision A

Operation and Installation Manual

Model 4205A Series

Digital Attenuator

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

1. Safety Summary ....................................................................................................................................4

1.1 Definitions......................................................................................................................................4

1.2 Detailed Precautions .......................................................................................................................4

1.3 Electrostatic Discharge Sensitive (ESDS) ..........................................................................................4

2. General Information ...............................................................................................................................5

2.1 Purpose .........................................................................................................................................5

2.2 Equipment Overview.......................................................................................................................5

3. Specifications.........................................................................................................................................5

3.1 Electrical Specifications ...................................................................................................................5

3.2 Timing Specifications ......................................................................................................................5

3.3 DC Power Input..............................................................................................................................6

4. Installation and Operation ......................................................................................................................7

4.1 Mounting .......................................................................................................................................7

4.2 RF Connectors & Cable Installation ..................................................................................................7

4.3 Control Connectors .........................................................................................................................7

4.3.1 J1 –AUX mode digital IO (10-pin 0.1” Header) .........................................................................7

4.3.2 J2 –USB Mini-B ......................................................................................................................8

4.4 USB/AUX Mode Interface Selection ..................................................................................................8

4.5 AUX Interface Modes ......................................................................................................................8

4.5.1 AUX Modes .............................................................................................................................8

4.5.2 PIO Mode ...............................................................................................................................9

4.5.3 SPI Mode................................................................................................................................9

4.5.4 I2C Mode ...............................................................................................................................9

4.5.5 SPI and I2C Attenuation Data Format.....................................................................................10

4.5.6 UART Mode .......................................................................................................................... 12

4.6 AUX Application Modes .................................................................................................................12

4.6.1 PIOSW Mode ........................................................................................................................12

4.6.2 PULSE Mode ......................................................................................................................... 13

4.6.3 FADE Mode...........................................................................................................................13

4.6.4 USB Mode AUX pin usage ......................................................................................................14

4.6.5 USB......................................................................................................................................14

5. Command Operation ............................................................................................................................15

5.1 Command Reference .................................................................................................................... 16

5.2 Application Specific Commands .....................................................................................................17

ATTN...........................................................................................................................................17

ATTN? .........................................................................................................................................17

STEPSIZE.....................................................................................................................................17

STEPSIZE? ................................................................................................................................... 17

INCR ...........................................................................................................................................18

DECR...........................................................................................................................................18

FADE ...........................................................................................................................................18

FADE?.......................................................................................................................................... 18

5.3 488.2 Common Commands ...........................................................................................................19

*CLS............................................................................................................................................ 19

MANUAL IM672

Table of Contents Page 3

*IDN?..........................................................................................................................................19

*OPC? .........................................................................................................................................19

*ESR?..........................................................................................................................................19

*RST ...........................................................................................................................................19

*TST?.......................................................................................................................................... 20

ERR? ...........................................................................................................................................20

5.4 Setup and Configuration Commands ..............................................................................................21

SET AUX ...................................................................................................................................... 21

SET USB ......................................................................................................................................21

SET ALIAS ...................................................................................................................................21

SET BAUDRATE ............................................................................................................................ 22

SET ATTN .................................................................................................................................... 22

SET I2CADDR............................................................................................................................... 22

SET I2CTRIG................................................................................................................................22

SET WPU ..................................................................................................................................... 22

SET PULSE...................................................................................................................................23

SET FADE .................................................................................................................................... 23

RUN AUX ..................................................................................................................................... 23

SHOW SET................................................................................................................................... 24

SHOW VERSION........................................................................................................................... 24

FACTORY PRESET ........................................................................................................................ 25

5.5 Misc. Commands .......................................................................................................................... 26

ALIAS?......................................................................................................................................... 26

ATTNIO .......................................................................................................................................26

CONSOLE.....................................................................................................................................26

CONSOLE? ................................................................................................................................... 26

DELAY .........................................................................................................................................27

REPEAT ....................................................................................................................................... 27

RFCONFIG?..................................................................................................................................27

RUN LOADER ............................................................................................................................... 27

5.6 USB Driver Installation..................................................................................................................29

5.7 awusbcdc.inf Installation File.........................................................................................................32

6. Factory Service and Repairs.................................................................................................................. 33

7. Contacting Weinschel ...........................................................................................................................34

8. Manufacturer Warranty ........................................................................................................................35

9. Revision History ................................................................................................................................... 36

10. Appendix .......................................................................................................................................37

MANUAL IM672

Specifications 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

Specifications Page 5

2. General Information

2.1 Purpose

This manual contains setup and operation information for the Weinschel Model 4205A Series, MMIC Digital

Attenuators. This manual is to be used in conjunction with the operation and installation of the Model 4205A

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

2.2 Equipment Overview

The 4205A series digital attenuators provide for control either via USB or a variety of digital interfaces via the

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

is done via USB command and can be changed via the user.

3. Specifications

3.1 Electrical Specifications

Parameter

Min

Typ

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

400ns

Powerup time

50ms

DC power to first command

Attenuation update rate

200KHz

Command processing time

2ms

USB mode

PIO mode

PIO input change to RF change

3us

5us

PIOSW input change to RF

1us

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

MANUAL IM672

Specifications Page 6

Parameter

Min

Typ

Max

Comments

I2C mode

SCL clock frequency

400KHz

RESETN width

10us

RESETN low pulse width (optional)

TRIG

1us

TRIG input, rising/falling edge (optional)

UART mode

Baudrate

9600

115K

3.3 DC Power Input

The 4205A 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 4205A 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.

MANUAL IM672

Installation and Operation Page 7

4. Installation and Operation

4.1 Mounting

Each Digital Attenuator is supplied with 12 mounting holes (4-40 UNC-2B x 4.1 [0.16 Deep]) located on the front,

back, top and bottom end of the attenuator. Refer to the appropriate Weinschel Specification/ICD drawing for the

mounting hole locations.

Figure 1. Connector Locations

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. 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 J1 –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.

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.

MANUAL IM672

AUX Application Modes Page 8

SIGNAL

PIO

I2C

SPI

UART

USB

4205A-31.5

4205A-63.5

4205A-95.5*

4205A-127*

0.25dB

0.5dB

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

4.3.2 J2 –USB Mini-B

The table below describes the pinout 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 4205A 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 4205A 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 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.

MANUAL IM672

AUX Application Modes Page 9

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 either a single 8-bit value for the 31.5dB

and 63.5dB models, or 16-bits for the 95.5dB and 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).

I2C messages consist of a device address byte, register select byte, and one or more data bytes depending on

the register. The Register address will automatically increment after each byte transferred. Messages are framed

using the standard I2C START, STOP, and ACK conditions. The I2C master should support clock stretching as the

4205A will hold the SCL clock low during the byte ACK phase until the data is accepted by the 4205A.

START

DEV ADDR

REG ADDR

DATA

<DATA>

STOP

The 4205A is a slave I2C device that supports 7-bit slave addressing. The slave address can be set via hardware

address pins A3-A0 on the AUX connector or via USB command (see SET I2CADDR). Using the hardware address

pins allows for up to 16 attenuators to share the same bus. In this mode the three upper bits of the address byte

are fixed at 0b010. The I2C R/W bit is the LSB of the address byte, providing for device addresses 0b0100000x –

0b0101111x (0x40-0x5E).

I2C Device Address

R/W

010 : fixed bits

A3-A0 : addr bits

R/W bit : WR=0, RD=1

MANUAL IM672

AUX Application Modes Page 10

A device address can also be assigned using the USB SET I2CADDR command which allows the use of all 7 D7-D1

address bits, with the exception of the reserved address 0. A software assigned address overrides the hardware

A3-A0 pins and connections to these pins are ignored. When specifying a software address always use the full 8-

bit byte value, with bit 0 set to 0 (it will be ignored as this is the I2C R/W bit). Setting the I2CADDR to 0 will

remove any software assigned address and revert back to hardware addressing mode.

I2C mode provides two optional control inputs: RESETN and TRIG. RESETN is a low-active signal that will reset

and reinitialize the attenuator. The TRIG signal allows attenuation changes to be performed on the TRIG input

becoming asserted instead of changing immediately when the I2C command is sent, and can be programmed to

be active-high or active-low (see I2CTRIG command). This can be used to synchronize multiple attenuators.

This is a general scratchpad register. Any 8-bit value written to this register can be read back and used to check

communications.

The ATTN_LB register is the lower byte of attenuation data used for attenuators with more than 8-bits of

programming data (4205A-95.5 and 4205A-127). This register should be written to prior to writing the ATTN_HB

The ATTN_HB register is used to set the upper byte of attenuation data for units with > 8-bits, or the single 8-bit

programming data for units that require only a single byte. The attenuator setting will be changed when this

4.5.5 SPI and I2C Attenuation Data Format

The data programming format is the same for both I2C and SPI modes; either a single 8-bit value or a 16-bit

word value. Either method may be used as long as the data properly formatted. 16-bit word data must be left-

justified and sent as two 8-bit bytes. In SPI mode 16-bit data should be written high-byte then low-byte, and the

value will be loaded on the rising edge of the SSN signal. In I2C mode the ATTN_LB low-byte register should be

written prior to setting the ATTN_HB register since in this mode accessing the high-byte register loads the value

into the attenuator.

The 4205A-31.5 and 4205A-63.5 models use a single byte to represent the D0-D7 programming bits. For these

units a single byte write to the ATTN_HB register is all that is required. The 4205A-95.5 and 4205A-127 models

require 9-bits of data to access the 0.25dB bit, so two bytes must be written if control of the 0.25dB bit is

desired.

Example 1: 4205A-31.5 using hardware addr pins A3-A0 set to 0100

Desired attenuation: 10.25dB

Compute the device address by combining the fixed upper portion, the addr pin setting, and the R/W bit=0

(write):

DEV ADDR = (0b010 << 5) + (0b0100 << 1) + 0 = 0b01001000 = 72 = 0x48

Compute the programming value. Each bit represents 0.25dB, so setting = INT((dB * 100)/25), or simply multiply

the dB value by 4 and use the integer result:

VAL = 10.25dB * 4 = 41 = 0x29 = 0b00101001

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