Viavi 87339, Operation Manual

Page: 55 / 198

Testing
3 - 14
3.2.5 Setup I/O Window
The Setup I/O Window is used to configure the test set Loss and Input/Output operational
parameters.
Fig. 3-7 Setup I/O Window
Control Component Description
Coupler Loss Numeric Pad: Antenna Coupler insertion loss in dB.
Range: 0 to 40 dB
Coupler Cable
Numeric Pad: Antenna Coupler RF coax cable loss in dB.
Range: 0 to 12 dB.
NOTE:
If using either the Dual, or Triple GPS Antenna Coupler
Kits please see the instructions for the appropriate kit in either
Appendix G or H to determine the loss value to enter in this
control component.
Direct Cable Numeric Pad: Direct RF coax cable loss in dB.
Range: 0 to 12 dB.
NOTE: If using the optional GPS Receiver Termination Kit see
the instructions for entering the appropriate direct cable loss
value for the components in Appendix I.
Ext Ref Out
Drop Down Selections:
ON - External reference output ON.
OFF - External reference output OFF.
Reference Source Drop Down Selections:
INT - Internal 10 MHz TCXO.
EXT - External 10 MHz input.
Trigger
Drop Down Selections:
Auto - Simulation will run immediately after the run button is
pressed.
External - Simulation will run once the external trigger line
toggles from a 3.3 LVTTL low level to a high level.