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202058 REV AA
6 RU SSPA Chassis Operations Manual
2.1.1.1 Vacuum Florescent Display (VFD)
The front panel 40x2 character VFD allows the user to get detailed information about
the state of the HPA and provides easy customization of operation through an
interactive menu structure. The menu structure is shown in
Figure 2-11
.
2.1.1.2 Navigation Keys
Up, Down, Left, Right and Enter keys on the right side of the front panel allow menu
navigation.
2.1.1.3 Standby Select Key
Function only in 1:1 Redundancy mode. Pressing this key will put the designated HPA
on standby. The LED beside this key will turn on when the HPA is online. This key has
no effect in either Standalone mode or the standby HPA in 1:1 Mode.
2.1.1.4 Main Menu Key
Provides a shortcut to the SSPA Main Menu.
2.1.1.5 Local / Remote Key
Allows the user to disable or enable the local control keypad console. If the SSPA is in
“Remote Only” mode, the unit will not react on any keystrokes except the “Local /
Remote” key.
2.1.1.6 Mute / Unmute Key
Provides an easy way to change the Mute status of the SSPA. Muting the amplifier via
the front panel requires 100 msec maximum (50 msec typical).
2.1.1.7 Input Sample Port (Optional)
An optional RF input sample port is located on the lower left corner of the SSPA front
panel. This provides a -10 dBc coupled sample of the RF input signal. It is a type N
female connector.
2.1.1.8 Output Sample Port
The Output RF Sample Port connector is located on the right lower corner of the HPA
front panel. This port provides a coupled sample of the RF output signal. A label listing
the calibration offset values is located below the type N female connector.
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