OPHIR RF - Table 2. General Notes on Operation

Appendix A
This Document contains proprietary and confidential information of Ophir RF Inc.
March 28, 2023 Rev: H
6
Table 2. General Notes on Operation
Item
Description
Comments
1
Default Power-Up
Setting
Standby ON (VVA @ 0% voltage), ALC OFF and GAIN ON.
UP/DOWN arrow keys adjust Gain of the amplifier in 0.1% steps. After
adjusting to desired power output, press Standby key once. Amplifier
will display actual power output and relative VVA voltage in
percentage. Press Standby key again and amplifier will again be in
Standby mode.
2
Fault Conditions
If fault occurs during normal operation, the information is shown on the
display and the red fault LED on the front panel illuminates. It also
reports the fault information via the IEEE-488 bus, RS-232 port and RS-
422 ports, if queried. To clear a fault, after fault condition is repaired,
push the STBY button.
o High Temperature – Turns OFF bias voltage, illuminates red
fault LED and sends fault status condition to IEEE-488 bus, RS-
232 port , RS-422 port, and Ethernet Port if queried. A normal
operating condition will be only restored once the fault has been
removed and Standby has been pressed (to acknowledge fault).
MESSAGE: “Temp”.
o High power – The amplifiers are programmed to automatically
reduce the drive level if the forward, reverse or input power
levels exceed factory-set values. Message: “Fwd Pwr”, “Rev
Pwr”, or “Input Pwr”.
o High VSWR – The amplifiers are programmed to reduce output
power to a factory-set maximum reverse-power level under high
load VSWR conditions. As with all other faults, the controller
will illuminate the fault LED Message: “VSWR”.
o Monitors – Occurs when DC input(s) exceeds or falls below
configured levels. If configured for amplifier shutdown, the
controller turns OFF the bias voltage and illuminates the fault
LED. A normal operating condition will be only restored once
the fault has been removed and Standby has been pressed (to
acknowledge fault). If configured for Notification Fault, the
controller will only display the fault without affecting the
current control status of the amplifier. Message: “Mon X”,
where “X” is the number of the monitor that tripped.
o Uncalibrated - If EEPROM is damaged or has lost its' stored
data, front panel will indicate “Error – Calibrate” and the
controller will not be useable. Complete re-calibration will be
required Message: “Error – Calibrate”
3
Basic Operating
Instructions
1. Drive the amplifier with a nominal level indicated by the
specifications included with the specific model of amplifier.
2. Adjust the desired output level or the gain using the Set ALC or
Set VVA level function, respectively.