Lantronix TSC 4092A IRIG-B - Manual (Page 23)

4092A Operations and Maintenance Manual 19
4.4 Configuring for Input Signal and Impedance
The Input Signal and Impedance settings are configured at the factory for a modulated input and
low Z input and output impedance. If the signal sources have a high Z output impedance, then
Caution
When opening the top cover and changing the power supply settings, use proper ESD precautions.
This includes ensuring that you are properly grounded before touching the internal PWA of the
unit to change the jumper settings.
Required for this procedure:
„ #1 Phillips screwdriver
To change the jumper settings:
1. Disconnect both power supplies from their power source.
2. Using a #1 Phillips screwdriver, remove the top cover.
3. Move the jumper one position to the left to the 2S position.
4. Replace the top cover.
5. Reconnect the power supplies.
4.5 Configuring for Dual Power Supplies
The power supply setting is configured at the factory based upon single or dual power supply
configuration. If you are adding a second power supply to a unit that was originally configured for
a single power supply, you should change the internal jumper setting. The jumper setting ensures
that the power supply LEDs reflect the proper configuration and that the second power supply is
monitored.
Inputs A & B impedance jumpers
configured for the LO-Z (50
Ω
).
Gain setting for selected input
impedance. Must follow Input
impedance. Signal Type jumper configured for
modulated (IRIG-B).