Calibration Procedure for the
Multiplexer
Tools Needed:
5/16 Wrench
SMA test cables (2)
RF Power Supply
Multiplexer Control Box
RF Signal Generator
Spectrum Analyzer
SMA Connector for Spectrum Analyzer
Calibration Data Sheet
- Preliminary
Setup
- Connect
the RF Power Supply to the Multiplexer Control Box with attached ribbon
cable
- Connect
the Multiplexer Control Box to the Multiplexer with attached ribbon cable
- Power
on RF Power Supply, RF Signal Generator, and Spectrum Analyzer
- Set
RF Signal Generator to 1497MHz @-30dBm, and turn RF on
- Connect
SMA test cable to RF Signal Generator and Spectrum Analyzer
- Measure
loss in the cable and record in calibration data sheet.
- Repeat
steps 1d, 1e, and 1f for the second SMA test cable
- Connect
one SMA test cable from RF Signal Generator to one input channel on the
RF Switch
- Connect
the other SMA test cable from the Spectrum Analyzer to the corresponding
channel output port.
- VSWR
- Measure
VSWR for each port (input and output) and record in calibration data
sheet. Must be <=1.8 for
passing.
- Insertion
Loss
- Measure
the loss for each channel by using the multiplexer control box to switch
between each channel (pass). For
example, to measure channel 1 (pass 1), select the binary equivalent to 1
on the multiplexer control box.
- Move
the SMA cables accordingly for each measurement
- Record
each reading in the calibration data sheet. Must be <= 2dBm for passing. NOTE: Don’t forget
to include both test cable loses in recording.
- Delta
- After
recording measurements for Step 2, calculate the difference of insertion
loss between all 4 ports (X+, X-, Y+, Y-) for each pass (1-5). Must be <=0.5dBm for passing.
- Isolation
- Repeat
steps 1h and 1i.
- Select
the other passes (other than the one with the SMA cable attachment). Repeat process for each RF
switch.
- Record
each measurement. Must be <=
57dBm for passing.