|Hewlett Packard 8444A Generator|
The Model 8444A Tracking Generator is designed to complement both Model 8554B and Model 8555A Spectrum Analyzer RF Sections. The Tracking Generator covers the frequency range of 500 kHz to 1250 MHz when used with the 8554 B RF Section and from 10 MHz to 1.3 GHz when used with the 8555A RF Section. The Tracking Generator/Spectrum Analyzer functions as a system to perform frequency response measurements. Additionally, the system can be used as a signal generator or sweeper to supply a test signal to other devices. An auxilliary output is provided for precision frequency measurements by an external frequency counter. 1-20. The Tracking Generator converts the first and third local oscillator (LO) signals from the Spectrum Analyzer RF Section, to a signal that tracks the frequency tuning of the RF Section. With the Spectrum Analyzer operating in ZERO SCAN WIDTH, the Tracking Generator is a CW signal generator, tuned to the frequency of the analyzer. In FULL or PER DIVISION SCAN WIDTH the Tracking Generator functions as a sweep oscillator which tracks the analyzer tuning. Additionally, a MANUAL SCAN control on the Tracking Generator allows manual tuning of the Spectrum Analyzer/Tracking Generator System. The amplitude of the Tracking Generator output is adjustable over a 0 to —10 dBm range by a front panel vernier control. The output level is calibrated at 30 MHz to 0 ±0.5 dBm and maintained by an automatic level control circuit. Refer to Table 1-1 for system performance specifications.
These manuals are available for the above equipment:
|Hewlett Packard -- 8444A -- Service Manual|
|Manual Type||Service Manual|
|Size||20.36 Mbytes (21347569 Bytes)|
|Quality||Scanned document, all readable.|
|Upload date||31 May 2015|
|Downloads||184 since 31 May 2015|
This manual applies directly to instruments with serial numbers prefixed 1323A. With modifications described in Section VII, this manual also applies to instruments with serial numbers prefixed 1033A, 1139A, 1147A, 1208A and 1215A. This manual contains all information required to install, operate, test, adjust and service the Hewlett-Packard Model 8444A Tracking Generator. This section covers instrument identification, description, options, accessories, specifications and other basic information. 1-3. Figure 1-1 shows the Hewlett-Packard Model 8444A Tracking Generator with accessories supplied. 1-4. The various sections in this manual provide information as follows: SECTION II, INSTALLATION, provides information relative to incoming inspection, power requirements, mounting, packing and shipping, etc. SECTION III, OPERATION, provides information relative to operating the instrument. SECTION IV, PERFORMANCE TESTS, provides information required to ascertain that the instrument is performing in accordance with published specifications. SECTION V, ADJUSTMENTS, provides information required to properly adjust and align the instrument after repairs are made. SECTION VI, REPLACEABLE PARTS, provides ordering information for all replaceable parts and assemblies. SECTION VII, MANUAL CHANGES, normally will contain no relevant information in the original issue of a manual. This section is reserved to provide back-dated and up-dated information in manual revisions or reprints. SECTION VIII, SERVICE, includes all in formation required to service the instrument.
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