Hewlett Packard 53131A Universal Counter 3 Channels 225MHz / 3GHz Option 030 010

Manufacturer: Hewlett Packard HP

Model: 53131A

Condition: For Parts or Not Working. Comes in non-original packaging.  This counter is in fair cosmetic condition, with minor scuffs/scratches/stains from prior use, and a few dings (mostly around the corners of the plastics).  The back has a handwritten X on the Option 010 mark, so we opened the case to see what's inside.  At some point, an upgraded timebase with the Agilent 10811-60160 crystal oscillator was fitted.
The photos show the exact item(s) the buyer will receive.

Notes: This counter is in mostly-working condition.  We let it warm up for a couple of hours, then gave it a quick check with our own test equipment and cables (not included). It was able to measure signals from 3GHz to 30Hz.  It struggled to find signals under 30Hz on both low-frequency channels. Channels 1 and 2 were both able to read signals in excess of 225 MHz.  Power-on self-test passes.  The display is not as bright as it should be, but still usable in bright room lighting.  We are not a calibration lab and can't guarantee calibration, but this unit was pretty close to the number on our generator.
No manuals, cords/cables, or additional items are included if not listed or shown.

Included:

• (1) HP 53131A Universal Counter

Specifications:

• Manufacturer: Hewlett Packard
• Mode: 53131A Universal Counter
• Frequency Range: DC to 3GHz
• Installed Options:
  • Option 030 (3GHz Channel 3)
  • Option 010 (High Stability Oven)(Retrofit)
• 10 digits per second, 500ps time interval resolution
• 1-button measurements
• With HPIB & RS-232 communications

AS-IS

• No returns - No refunds - No exchanges
• By purchasing this item, you are agreeing to not seek reimbursement should the item not function to the manufacturer's specifications.
• Read the notes carefully to ensure you are buying something you can use
• See complete terms

CDN Systems LLC, DBA Doug Deals, is not an authorized distributor or affiliated with the manufacturer of this product. Original manufacturer's warranty does not apply.