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The HP 141T Display Section is the Chassis and CRT for the Spectrum Analyzer. It comprises the low voltage and high voltage power supplies, and the pulse circuits for the variable persistance and storage display modes of the CRT. It cost $2,600 in 1980. The right-hand side of the chassis is for either '8550 series' Spectrum Analyser plug-in units or '1400 series' Oscilloscope plug-in units. I have the paper and downloaded Manuals.

Front view with Display Section on the left and 
space for the 2 plug-in units on the right

Rear view with Aux connectors on right
The Rear Panel has a BNC socket for Z-Axis Input and an Internal/External Z-Axis Switch.

Much more complicated are the 2 special D-type connectors.

AUX A is for connection to a Tracking Generator, either the HP 8443A Tracking Generator Counter 100kHz to 110MHz, or the HP 8444A Tracking Generator 500kHz to 1,300MHz. Each of these require a special inter-connecting cable.

AUX B is for connection to a HP 8445B Automatic Preselector, this also requires special inter-connecting cables.

The special inter-connecting cables are essential, expensive and difficult to find! 

GLK Instruments manufacture these cables to order, see www.glkinst.com

October 2006

Some repair work was required to get this Display fully operational, for details see Repair HP 141T Display Section.

Internal connectors for plug-ins
Internal connectors from top to bottom are: J2, J9, J11 & J1.

Connectors J2, J9 & J11 mate with the upper plug-in unit, either the HP 8553B RF Section, HP 8554B RF Section, HP 8555A RF Section or HP 8556A LF Section.

Connector J1 mates with the lower plug-in unit, the HP 8552B IF Section.

The utilisation of the pins for J1 and J2 varies depending on the plug-in used. For the Oscilloscope the 1400 series plug-ins could also be used. For the Spectrum Analyser details are provided HP 141T Display Section Internal Connections.

Details of the special D-type connectors are provided HP 141T Display Section External Connections.

August 2015

Bought a second HP 141T Display Section together with a HP 8552A IF Section and HP 8553L RF Section for only £25.  The 8552A and 8553L are both economy versions with a lower specification than the 8552B and 8553B, so have been resold. The 141T has been dismantled for spare parts, see HP 141T Parts.