149
Installation
Switching on the Attenuator
rear, and at least 25mm (1inch) of clearan ce at each side. Failure to
provide adequate air clearance may result in excessive internal
temperature, reducing instrument reliability.
Figure A-5 Correct Positioning o f the Attenuato r

A.5 Switching on the Attenuator

When you switch on the attenuator it goes throu gh self test. This is
the same as the self test described in “*TST?” on page 103.

A.6 Monitor Output

If you have option 121 or option 221(the monitor output), then the
Monitor Output provides a signal for monitorin g the power getting
through the attenuator. The signal level is approximately 5% of the
output power level. For the most accurate results, measure the