Chapter 7 501
Language Reference
MBIAS Mixer Bias
MBIAS Mixer Bias
Syntax
Figure 7-147 MBIAS Syntax
Description
The MBIAS command sets the bias for an external mixer that requires
diode bias for efficient mixer operation. The bias, which is provided on
the center conductor of the IF input, is activated when MBIAS is
executed. A + or − appears on the left edge of the spectrum analyzer
display, indicating that positive or negative bias is on. When the bias is
turned off, MBIAS is set to 0. Default units are in milliamps. This
function does not apply to an 8560E/EC Option 002.
CAUTION The open-circuit voltage can be as great as ±3.5 V through a source
resistance of 300 ohms. Such voltage may appear when recalling an
instrument state in which an active bias has been stored.
NOTE The bias value that appears on the spectrum analyzer display is
expressed in terms of short-circuit current (the amount of current that
would flow if the IF line were shorted to ground). The actual amount of
current flowing into the mixer will be less.
To Next Page
Loading...
Need help?
General
