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E2730A VXI RF TUNER
2.2.6 70 MHz IF OUT (W4J4)
2.2.7 2nd LO IN/OUT (W3J3)
2.2.8 1st LO IN/OUT (W1J1)
INSTALLATION
The 70 MHz IF OUT SMA connector provides a 70 MHz center frequency
output with a 36 MHz bandwidth. The output signal frequency spectrum
is inverted and the output signal level is 20 dB nominal above the RF input
level with the RF attenuator set to zero dB and the RF preamplifier turned
on. The output impedance is 50 ohms.
The 2nd LO IN/OUT SMA bi-directional connector provides a sample of
the 2nd LO synthesizer frequency. The 2nd LO frequency ranges from
3710.001 MHz to 3712.5 MHz in 1-kHz steps. The +7 dBm (minimum)
output level may be used in another E2730A tuner to form a two-channel,
phase-coherent tuner. This connector, via internal switching, may also be
used to input a 2nd LO frequency from another E2730A tuner to form a
Master/Slave relationship. The appropriate operating mode (independent,
master or slave) must be remotely selected via the LOM command which
is described in Section 3 of this manual. The impedance of this connector
is 50 ohms.
NOTE:
Master/slave connections require the use of short semi-rigid RF
cables between the LO inputs and outputs. When the tuner is
not used in master/slave mode, these cables must be
disconnected to prevent spurious signals from appearing in
both tuners. Also, an unused LO IN/OUT connector should be
terminated with mating termination dust cap, MP2 .
The 1st LO IN/OUT SMA bi-directional connector provides a sample of
the 1st LO synthesizer frequency. The 1st LO frequency ranges from
3802.5 MHz to 6482.5 MHz in 2.5-MHz steps. The +7 dBm (minimum)
output level may be used in another E2730A tuner to form a two-channel,
phase-coherent receiving system. This connector, via internal switching,
may also be used to input a 1st LO frequency from another E2730A tuner
to form a Master/Slave relationship. The appropriate operating mode
(independent, master or slave) must be remotely selected via the LOM
command which is described in Section 3 of this manual. The impedance
of this connector is 50 ohms.
NOTE:
Master/slave connections require the use of short semi-rigid RF
cables between the LO inputs and outputs. When the tuner is
not used in master/slave mode, these cables must be
disconnected to prevent spurious signals from appearing in
both tuners. Also, an unused LO IN/OUT connector should be
terminated with mating termination dust cap, MP3.
2-7
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