HP/Agilent 5342A
CW Microwave Frequency Counter
(w/ OPT 006: Limiter Input Protection)


* HP 5342A Counter
* HP 5342A Operation and Service Manual


The HP 5342A Microwave Counter provide Automatic Frequency Measurements up to 18 to 26.5 GHz in highly portable packages. The powerful and versatile microprocessor controlled keyboards can accomplish offset tasks as a standard feature as well as providing user interactive diagnostic information. The eleven-digit display is sectionalized for easy readout to one hertz resolution. This unit utilizes the Harmonic Heterodyne down conversion technique which combines the best performance features of the Heterodyne Converter and Transfer Oscillator Techniques. Now Wide FM Tolerance is achievable along with high input sensitivity and automatic amplitude discrimination. This allows the counter to automatically measure the largest signal present within the counters' spectrum while ignoring all others.


Input 1:

  • Frequency Range: 500 MHz to 18 GHz
  • Sensitivity:
    • 500 MHz to 12.4 GHz: -25 dBm
    • 12.4 GHz to 18 GHz: -20 dBm
  • Maximum Input: +5 dBm
  • Connector: Precision Type N female

Input 2:

  • Frequency Range: 10 Hz to 520 MHz Direct Count
  • Sensitivity:
    • 50 ohms: 10 Hz to 520 MHz, 25 mV rms
    • 1 Mohm: 10 Hz to 25 MHz,  25 mV rms
  • Maximum Input: 50 ohms 3.5V rms (+24 dBm) or 5V dc fused protected; 1 Mohm 200V dc +5.0V rms
  • Coupling: AC
  • Connector: Type BNC (female)
  • Impedance: Selectable, 1 Mohm, <50 pF or 50 ohm nominal

This unit is tested and is fully operational.
It was built back in the golden era of HP and is "Beautifully Constructed!"

The main cause of microwave counter failure is front-end overload.
This unit includes the very desirable option 006,
which is a front-end limiter that will protect the input from damage from CW signals up to +39dBm. (8 watts)



As our many customers will attest, we will do our very best to resolve any customer problems.  But our official policy is: 

  • All items sold carry a 3-day Right Of Return Warranty. 
  • All claims must be made within 3 days of receipt. 
  • All warranties are void if the calibration / warranty seals are broken.

Shipping Policy

Shipping to be determined depending on geographical location.  We will make every effort to ship within 24 hours of receipt of payment.  We ship with FedEx only.  We will be glad to ship with other carriers using the purchasers shipping account.  Please contact us to make any special shipping arrangements. For shipping rate research, our shipping address is Boulder, CO USA ---- Zip Code is 80305.

Foreign Buyers:  Unless special provisions have been made, you are responsible for making your own shipping arrangements and all costs related to customs, duties & special packaging requirements.  Please do not ask us to quote you international shipping rates.  Use the address information above to research you own shipping rates.  You can email mstojak@ascentconcepts.com to get the packaging fee, package weight and size for your research.  Items sold outside the USA are sold as is.  

Payment Policy

We accept Credit Card payment through Paypal.   We accept Cashiers Check or Money Orders.

Ascent Concepts and Technologies
is a Research & Development Lab.  As a service to the companies and institutions we work with, we broker their excess equipment & act as application specialists on their new equipment needs.  We are now offering quality used equipment to the public with the same level of professionalism and service.   Please feel free to email at thomasknox@ascentconcepts.com or call Thomas @ 1-303-554-0307 with any Technical questions.  Please feel free to email at mstojak@ascentconcepts.com with any Shipping or Logistical questions. We make every effort to evaluate and guarantee our equipment.  Although we do not provide NIST traceable calibration, we do have extensive in house calibration equipment and make every effort to test and verify performance on equipment we sell.  However we do not warranty any items shipped outside the United States. 



The equipment shown is a representation only.  We often have multiple units in stock so please email us with your needs.  We have a large inventory and can usually find any test and measurement item in a short time frame.------Inquires info@ascentconcept.com