22 Getting Started Guide
Exterior Features
Instrument-Facing Side
Instrument-Facing Side
Figure 3-4
M1740A instrument-facing side
These ports are typically cabled to the input and output ports of the E7760B
Wideband Transceiver, or other test equipment. The ports are described in the
following table.
Number
Name
Description
1
LO/IF Out
(SMA connector)
This port provides the IF output of the downconverter in the M1740A (that is, the
downconverted return signal from the DUT). This port also accepts an LO input to
be used by the downconverter.
2
IF In/Out
(SMA connector)
This port can be used either to accept an IF input to the upconverter in the
M1740A (this is the test signal to be upconverted and sent to the DUT) or to
provide the IF output of the downconverter in the M1740A (this is the
downconverted return signal from the DUT).
3
IF In
(SMA connector)
This port accepts an IF input to the upconverter in the M1740A (this is the test
signal to be upconverted and sent to the DUT).
4
LO/Pwr/Ctrl/IF In
(SMA connector)
This port accepts an IF input to the upconverter in the M1740A (this is the test
signal to be upconverted and sent to the DUT). This port also accepts the
following inputs, which are combined with the IF input signal:
— An LO input to be used by the upconverter and/or downconverter
in the M1740A.
— A DC voltage input to power the M1740A.
— A control signal to operate the M1740A.
Do not connect or disconnect the RF cable, at either end, while the connected
instrument is powered on.
