Wavetek SAM 3000 Operation Handbook page 21

DEVICE
UNDER
TEST
SAM 3000 TEST
BRIDGE
Return Loss Test Set-up Using SAM 3000 Calibrator
Return loss may also be measured with the SAM 3000 using a return loss bridge
(Wavetek FB40-75) and a signal generator (Wavetek MC-50 600). Connect the
equipment as shown. With the bridge test port "open", apply a signal at the
desired frequency from the signal generator to the input of the bridge, and read
the signal level at that frequency from the bridge output with the SAM 3000.
Press "FCN" "GAIN". The top line of the LCD will display "0.0 dB". Next
connect the device under test to the bridge test port, and the return loss will be
indicated on the top line of the LCD.
DEVICE UNDER TEST
TEST
BRIDGE
SIG GEN OUT SAM 3000
RF IN RF OUT
Return Loss Test Set-up Using a Signal Generator
How To Test Taps And Splitters
The preferred method of testing passive components such as splitters and taps
utilizes a sweep generator, RF detector, and oscilloscope; however, and
operational check (adequate for most circumstances) can be performed using a
SAM 3000 and a signal generator (Wavetek MC-50 600). If a signal generator
is not available, the TV channel carriers themselves (coupled through appropri-
ate amplifiers and attenuation pads) can be used as test signals.
The method is to set up a reference (0.0 dB) level by connecting the reference
signal to the SAM 3000 RF In, and pressing "FCN" "GAIN". Then thereference
signal is routed through the device under test, and the top line of the LCD will
display the loss of the device. The SAM 3000 calibrator may be used for any of
these tests to perform a quick go/no-go test at the calibrator frequency when a
signal generator or system test point is unavailable. The calibrator is activated
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