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postheadericon Programmable attenuators AT490/690

AT490

The AT490 is a universal digital attenuator with standalone supply and small dimensions, providing easy handling and remote control through RS232 9 pins interface.
Its small size and ease of use will soon make it a must in any RF professionnal or amateur lab.
Its communication possibilities allows to include it in a larger automated test bench or in complete instrumentation systems.

The AT690-USB is the extended frequency range version, with some great additionnal features, like USB connection, Li-Ion battery, rugged aluminium housing and graphical display.

AT490 is also available with 75 Ohms impedance, but with limited frequency range (2.2 GHz) and BNC connectors, as reference AT290-75.

Download data-sheet : AT490-en (PDF)

AT690-USB (PDF)

AT290/490/690 Features

AT490-50AT290-75AT690-USB
Frequency range100 kHz to 4 GHz100 kHz to 2.2 GHz100 kHz to 6 GHz
Attenuation range0 to 91 dB, 1 dB step0 to 91 dB, 1 dB step0 to 91 dB, 1 dB step
Insertion loss< 6 dB at 1 GHz
< 7 dB at 2 GHz
< 8 dB at 3 GHz
< 10 dB to 4 GHz
< 6 dB at 1 GHz
< 7 dB at 2 GHz
< 6 dB at 1 GHz
< 7 dB at 2 GHz
< 8 dB at 3 GHz
< 13 dB to 6 GHz
RF port & ImpedanceSMA, 50 OhmsBNC, 75 OhmsSMA, 50 Ohms
Max power25 dBm25 dBm25 dBm
IP3> 35 dBm> 35 dBm> 35 dBm
Précision (at 25°C)0..15dB : +/- 0.3dB + 3%
16..91 dB: +/- 0.3 dB + 5%
0..15dB : +/- 0.3dB + 3%
16..91 dB: +/- 0.3 dB + 5%
0..15dB : +/- 0.3dB + 3%
16..91 dB: +/- 0.3 dB + 5%
Supply2x 1V5 AA or 1x9V 6LR61 type battery,
external supply 7..15Vdc
2x 1V5 AA or 1x9V 6LR61 type battery,
external supply 7..15Vdc
USB 5V +/- 0.5V
Internal Li-ion battery 800 mAh
Temperature range0.. 50°C0.. 50°C0.. 50°C
InterfaceRS232, 9 pins Sub-DRS232, 9 pins Sub-DUSB, mini B
Autonomy12 months (in standby)
250h (in use)
12 months (in standby)
250h (in use)
12 months (in standby)
200h (in use)
DatasheetAT490-50AT290-75AT690-USB

AT490-50 :

AT690-USB

Availability : 6 weeks
Price : 375 € ht (450 € with VAT)

Options

AT290-75 :

Availability : 6 weeks
Price : 375 € ht (450 € with VAT)

AT690-USB :

Availability : 1-2 weeks
Price : 410€ ht (492 € with VAT)

For any question, feel free to contact us at: sales@ormelabs.com

General sales conditions