Description
Model 50PA-929 is a 50 Ohm attenuator assembly containing one solid-state step attenuator. The enclosure is 19 inch rack mount type with 1RU height. The attenuator has an attenuation range of 0 to 63.5dB by 0.5dB steps and operates at 30-3000 MHz. The attenuator can be controlled manually or remotely. It is available with SMA female or N female 50 Ohm coaxial RF connectors. The RF connectors are located on the front panel. We label the RF connectors as Input and Output, but the attenuator is bi-directional.
Manual Attenuator Control
On the front panel is a manual lever switch. This lever can be used to adjust the attenuation up/down. The lever is a momentary type switch so you can “tap to step” or “hold to jog”. The current dB setting is displayed on the front panel directly above the lever switch. As you manually change the dB setting of the attenuator you will see the displayed dB value change correspondingly. You will also view any changes that a remotely connected user makes to the dB setting of the attenuator.
Remote Attenuator Control
This attenuator assembly can be remotely controlled via an Ethernet connection or a serial connection (i.e. RS-232). The network interface can be set in either DHCP mode or Fixed Address mode. We ship all new test systems from the factory in DHCP mode. A RS-232 connection to the test system is made using a null modem type serial cable. Baud rates up to 155200 Baud are available.
Remote Command Set
The firmware manual for our latest generation firmware is available for download. This manual lists all of our remote commands with command syntax and examples. Our firmware uses simple ASCII formatted remote commands. If you are connected to a JFW test system and send the HELP command, it will respond back with a list of all remote commands for that specific test system.
