Operation Model 8901B
(50R)
nominal input impedance (LO Input and LO Output).
Two
jumpers are provided
to
allow
the internal LO signal
to
be routed
to
the LO input connector when no external
LO
is
in
use.
The Option Series
030
instruments are provided with an
LO
input connector, an
LO
output
connector and
a
remotely controllable switch which selects between them.
If
an
external
LO
is
connected but the
signal
is
not in use, the switch routes the external LO signal back out the LO
output connector. [See
High Selectivity Measurements.]
Do
not apply reverse power into the
u)
OUTPUT
or damage to the
instrument may result.
Do
not apply greater than
40
Vdc
or
+5
dBm
of
RFpower into the
LO
INPUT
or damage to the instrument
may
result.
16. CALIBRATION OUTPUT RF PWR and AMFM produces a rear-panel output for
RF
Power
and AM and FM calibrators. This output
is
supplied on Option
001
instruments instead of the
standard front-panel connection. Refer
to
both CALIBRATION RF POWER OUTPUT and
CALIBRATION AMFM OUTPUT referenced from Figure 3-1.
3-10
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