Description
Model 75PA-103 is a 75 Ohm benchtop attenuator assembly containing one solid-state step attenuator. The attenuator has an attenuation range of 0 to 63dB by 1dB steps and operates from 5-1650 MHz. The attenuator can be controlled manually or remotely. It is available with 75 Ohm F female coaxial RF connectors. The RF connectors are located on the rear panel. The ports are not designated input or output because 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.
