Service Monitors — Buy & Sell Used Service Monitors
Service monitors are the workhorses of two-way radio shops, public safety comms teams, and LMR integrators — and good used units are always in demand. If you're retiring a bench, we'll buy it. If you're outfitting one, we'll quote the exact model you need, from legacy IFR to current Viavi.
Available Models & Sourcing Catalog
We buy and sell tested, verified-working used service monitors from leading brands. Find your model below to request a buy quote or get an offer on yours.
| Brand | Model | Description | Actions |
|---|---|---|---|
| Viavi / Aeroflex | 8800SX | Digital radio test set | |
| Viavi / Aeroflex | 8800S | Digital radio test set | |
| Aeroflex / IFR | 3920B | Analog/digital radio test | |
| Aeroflex / IFR | 3920 | Radio test platform | |
| Aeroflex / IFR | 3550R | Portable radio test | |
| Aeroflex / IFR | 3550 | Portable radio test | |
| Aeroflex / IFR | 3500A | Portable radio test | |
| Aeroflex / IFR | 2975 | P25 radio test set | |
| Aeroflex / IFR | 2945B | Communications test set | |
| Aeroflex / IFR | COM-120B | Communications monitor | |
| Aeroflex / IFR | IFR 1200S | Service monitor | |
| Aeroflex / IFR | IFR 1600S | Service monitor | |
| Freedom / General Dynamics | R8000C | Communications analyzer | |
| Freedom / General Dynamics | R8100 | Communications analyzer | |
| General Dynamics / Motorola | R2670B | Digital comm analyzer | |
| Motorola | R2600B | Communications analyzer | |
| Motorola | R2001D | Communications analyzer | |
| Keysight / HP | 8920B | RF communications test | |
| Keysight / HP | 8920A | RF communications test | |
| Keysight / HP | 8921A | Cell site test set | |
| Keysight / HP | 8935 | CDMA cellular test | |
| Marconi | 2955B | Radio communications test | |
| Cushman | CE-50 | Service monitor | |
| Rohde & Schwarz | CMS54 | Radio communication monitor | |
| Wavetek | 4032 | Mobile radio tester |
Service Monitors Buying Guide
A communications service monitor (radio test set) combines a signal generator, receiver, and analyzer into one box for testing and aligning two-way radios. The decisive specs are frequency range, the analog formats it handles (AM/FM, SINAD, distortion), and — most importantly today — the digital radio formats it supports. If you maintain public-safety or land-mobile systems, confirm coverage of the standards you actually service: P25 Phase 1 and Phase 2, DMR, NXDN, and TETRA are all separate capabilities, not a given.
More than almost any other instrument, a service monitor's used value is set by its installed software options. On platforms like the VIAVI/Aeroflex/IFR 2975, 3920, and 8800, and Astronics units, each digital format (P25 P2, DMR, etc.) is a costly license — so a fully optioned 3920 with P25 Phase 2 and DMR is worth multiples of a base unit. When you request a quote, the format options and any included accessories (antennas, RF cables, manuals) matter as much as the model number. A current calibration certificate adds a premium, since shops need in-cal gear for compliant work.
Refurbished service monitors typically save 40-70% off list, and a maintained unit performs identically for the formats it's licensed for. Bench and field-portable models both hold value well when the digital options are present. Whether you're sourcing a unit or retiring one, send us the model and its installed format options and we'll quote within one business day.
Frequently Asked Questions
How much is my used service monitor worth?
Value is driven primarily by the installed digital format options (P25, DMR, NXDN, TETRA), the model, and calibration status. Send us the model and a list of enabled formats and we'll return a fair-market offer within one business day.
What radio formats does it support, and can more be added?
Formats are licensed individually, so a given unit supports only what's installed. On many platforms additional formats can be added as software options later, which is also why a fully optioned unit commands a much higher price.
Can it test both analog and digital radios?
Most modern service monitors handle analog (AM/FM, SINAD, distortion) as standard and add digital formats via licenses. Confirm which digital standards are installed before assuming P25 or DMR coverage.
Do you buy non-working or out-of-calibration service monitors?
Yes. We purchase units as-is, including out-of-cal and partially working instruments. Note the condition and installed options when you request a quote.
Why buy refurbished instead of new?
Refurbished service monitors typically cost 40-70% less than new with identical performance for their licensed formats. Every unit is tested and verified, and calibration can be arranged.
Don't see your model listed?
The test equipment catalog is massive. We trade, buy, and sell thousands of unlisted models from Keysight, Tektronix, Rohde & Schwarz, and other manufacturers. Tell us what you need and our sourcing team will find it.
We Buy Surplus Service Monitors Nationwide
Turn your retired, underutilized, or surplus equipment into working capital. We purchase single units as well as entire lab liquidations. Fast offers, immediate payments, and we coordinate all freight logistics.