Technical data

DLPs-including System
Diagnostics programs-be maintained.
4-2 Verification
DLPs are erased from
memory. It is imperative that backup copies of all
8 Test Aborted Early
In addition, any error messages will be displayed on the screen. Depending on which failure
occurs, System Diagnostic6 may not run to completion. Refer to Chapter 5 of this manual for
a list of error messages. Refer to the troubleshooting chapter of the system master installation
and verification manual for more details on test results.
Caution
As programs are down-loaded, any previously stored
m Addressing Error
8 Test Completed
I
with the message Select Desired System to Test. Once the calibrator has been connected
and selection of a system has been made, no further user interaction is required. System
Diagnostics will run and exit with one of the following messages:
softkey, a menu will appear d1a.g System
dBm input to the RF INPUT of the anal zer, nominally the CALIBRATOR
OUTPUT of the HP 70900A. Upon pressing the
3-l/2 inch disks
System Diagnostics Operation. System Diagnostics requires the presence of a 300 MHz
signal at -10
5-l/4 inch disks
n Order HP part number 70909-10026 for
DLPs do not go away when power is turned off, so they can be put in an instrument and
used repeatedly.
The purpose of System Diagnostics is to determine if any catastrophic failure has occurred in
the spectrum analyzer and, further, to determine where the failure occurred. A catastrophic
failure is a failure which renders the instrument unusable.
A secondary purpose of System Diagnostics is to determine if any “soft ” failures have occurred
and to diagnose, to the module level, where the “soft ” failure occurred. A “soft ” failure is
defined as a failure which renders some circuitry of the instrument unusable or beyond its
proper operating limit.
The HP 70903A IF Section tests are included in System Diagnostics and will be performed
if an HP 70903A IF Section is included in the spectrum analyzer under test. The System
Diagnostics DLP tests are available on disks for down-loading into HP 70900 Modular
Spectrum Analyzers. Contact the nearest HP Sales and Service Office to obtain these disks.
The following part numbers are for use with systems with LO firmware 861015 or later.
n Order HP part number 70900-10025 for
System Diagnostics
System Diagnostics is a downloadable (DLP) program that is downloaded into each standard
HP 70090 Series system shipped to a customer. A DLP is a sequence of HP-IB codes which
resides in the RAM of the LO and can be executed from within the
analyzer at the press of a
key.