Cheap Spectrum Analyzer for Field Technicians

Note that there are three similar models. The screen image shown above is the 18 GHz version.  The ones for sale are the 3 GHz version. These are fine for measurements made at L band frequencies, such as tx/rx paths 950-2150Hz.

Clarify the model number and serial number before purchase and check the details. Some higher serial numbers have 80V rather than 50V protection on the RF input. Some model numbers have different span options.

I've only used one of these on a single occasion and I consider it very good value for money at the ebay prices.

Whatever analyser you buy, the time and effort you put in learning to use it will be most important. Practice before going to customer site !

Read the technical data sheet here:
Rohde-Schwarz Spectrum Analysers FSH3 FSH6 FSH1

A useful accessory to have is a 10dB tap or splitter with DC pass on the main path, like this:


Provide yourself with suitable male and female cables,  connectors and adaptors.

Using these accessories you can interpose yourself in either the transmit or receive path to monitor what is going on while the system is powered and working normally (less about 1dB loss due to the splitter insertion!)

Best regards, Eric

Personally, I like the Tektronix 2715.  Available on EBay for about $1,000 US.

It has a good built-in self test to confirm working and range of freq: 9khz - 1.8Ghz.  100mw input pwr, into 75ohms.

It is a bit heavy, made for cable tv industry but very good for our L-Band measurements.  Sturdy handle hangs on basket of service truck or JLG lift.

Use care to strap it to the basket of JLG as my old JLG confuses me with a lacross ball and wants to send me flying.

The 2715 has many built-in programs that work for either CATV or L-Band VSAT. These are not included in 2714 and earlier.