25
User enters -25
then presses Enter
Figure 8.1.1-4 – User Enters -25 dBm for LOS Level and the LOS Alarm is Activated
Figure 8.1.1-5 illustrates the operational difference between having the Auto Shutdown Mode
enabled versus disabled. In this case, there is approximately -15.5 dBm input power present. The
left window shows the amplifier being disabled since the Auto Shutdown Mode is activated, the
output power level is displayed as the minimum possible value. The right window shows the
amplifier still enabled with an optical output power level of approxi10.0 dBm.
User chooses to
Disable the Auto
Shutdown Mode
User chooses to
Enable the Auto
Shutdown Mode
Figure 8.1.1-5 – Comparison of Amplifier Operation with No Input Power and Auto Shutdown
Mode Enabled Versus Disabled
This amplifier module can operate in either Automatic Current Control (ACC) or Automatic Power
Control (APC) mode as selected by the user from the appropriate dropdown menu. When ACC is
selected, the user must enter the target bias current setting which ranges from 0 mA to the Bias
Current Limit shown in the second row of status. Once the user types in the target bias current and
presses Enter, the module is commanded to provide that specific bias current to the amplifier as
shown in Figure 8.1.1-6. The internal amplifier has a bias current setting accuracy of ±10% so the
bias current displayed in the first row of status can have a variation of up to ±10% compared to the
user entered bias current setting.
