HP ESA-L1500A User's And Calibration Manual page 36

manually to maintain calibration.) Refer to the
All
Alignments
information on alignment key functions.
6 10 MHz REF IN
provide the 10 MHz, 15 to +10 dBm frequency
reference used by the spectrum analyzer.
10 MHz REF OUT
timebase reference signal.
7 Service Connector.
use only.
8 Power On Selection
is applied to the analyzer's rear panel power connector.
The analyzer can be set to always be off when power is
connected, or it can be set to go to the on/off condition
that existed when power was disconnected. This is
useful when the analyzer is used at an unattended
location to ensure that the analyzer powers on after a
power outage.
9 DC Fuse
power connector on the rear panel of the spectrum
analyzer.
10 DC Power
"Power Requirements" in the Specifications Chapter.
Chapter 2
key description in Chapter 4 for more
accepts an external frequency source to
provides a 10 MHz, 0 dBm minimum,
The service connector is for service
selects a preference for when power
. Protects against too much power to the DC
is the input for the DC power source. Refer to
Getting Started
Rear Panel Features
35