Siglent UKitSSA3X SSA / VNA utility kit
Siglent UKitSSA3X Spectrum analyzer utility kit for the SSA3000X Spectrum Analyzer series or SVA1000X Vectornetwork Analyzer series.
The connection kit for an N-port analyser
A Siglent bench spectrum analyser, signal generator or vector network analyser presents an N female RF port. Almost nothing you want to measure does. Filters, amplifiers, antennas and evaluation boards terminate in SMA; a great deal of older lab equipment is still BNC. Between the instrument and the device there is always an interface to bridge, and it is rarely the one you have on the bench.
The UKitSSA3X is the set that bridges it: two 700 mm cables, four adaptors covering SMA and BNC in both orientations, and a 10 dB attenuator to put in front of the input when the source level is not yet known. Siglent specifies it for the SSA3000X and SVA1000X families, and the connectors fit any of our N-ported instruments.
What separates it from a drawer of assorted adaptors is that every piece is specified. The cables are rated DC–6 GHz with VSWR below 1.25, the adaptors and the pad below 1.2. An unspecified adaptor is not a neutral component — it reflects part of your signal, and that reflection arrives back on your trace looking like something the device under test did.
Gets an N-port instrument onto anything
Siglent bench analysers and generators present an N female RF port. Almost every device you connect to one — filter, amplifier, antenna, evaluation board — terminates in SMA or BNC. The kit closes that gap in both directions, with two cables and four adaptors.
Specified parts, not anonymous ones
Every item carries a published frequency range and VSWR: <1.25 for the cables, <1.2 for the adaptors and attenuator. That matters because a mismatched adaptor adds ripple to your trace that looks exactly like the device under test.
A 10 dB pad in front of the input
The attenuator buys back 10 dB of headroom on an input that is genuinely fragile. On an SVA1000X the maximum input is +30 dBm and the damage level +33 dBm — a pad is far cheaper than a front end.
One order instead of five
The parts are matched to each other and to the instrument, and arrive together. Assembling the same capability from separate line items means several orders, several lead times, and no guarantee the adaptors are specified at all.
What is in the box
- 1×N (M) – SMA (M) cable
- 1×N (M) – N (M) cable
- 2×N (M) – BNC (F) adaptor
- 2×N (M) – SMA (F) adaptor
- 1×10 dB attenuator, N–N
Order code UKitSSA3X · supplied by SIGLENT
When you need it
Measuring a filter or amplifier
The tracking generator drives the device and the RF input reads what returns, so you need two cables before you can even normalise. That is exactly the pair in this box.
Connecting an SMA device
The N (M)–SMA (F) adaptors let any SMA-male device mate directly with the instrument port, and the N (M)–SMA (M) cable covers the other orientation.
Protecting the input on an unknown source
Fit the 10 dB attenuator before you connect anything whose level you have not measured. A +40 dBm source arrives at +30 dBm instead of destroying the front end.
Bringing BNC equipment in
The N (M)–BNC (F) adaptors take signals from oscilloscopes, older generators and lab equipment that never left BNC — below 2 GHz.
Specifications
Every figure below is from the official Siglent UKitSSA3X instruction sheet, including the internal model numbers. 50 Ω throughout.
| Item | Qty | Model | Frequency | VSWR | Specification |
|---|---|---|---|---|---|
| N (M) – SMA (M) cable | 1 | X404-SMAJ-NJ-0.7M | DC – 6 GHz | < 1.25 | 700 mm |
| N (M) – N (M) cable | 1 | X404-NJ-NJ-0.7M | DC – 6 GHz | < 1.25 | 700 mm |
| N (M) – BNC (F) adaptor | 2 | N/BNC-JK | DC – 2 GHz | < 1.2 | — |
| N (M) – SMA (F) adaptor | 2 | N/SMA-JK | DC – 6 GHz | < 1.2 | — |
| 10 dB attenuator, N–N | 1 | AA-10dB-N-J/K | DC – 6 GHz | < 1.2 | 1 W · 50 × 16 mm |
Read the frequency column before you order
The parts in this kit are not all rated to the same ceiling, and neither is every instrument it fits. Two limits are worth knowing up front:
- The BNC adaptors stop at 2 GHz — the tightest specification in the box. Everything else in the kit reaches 6 GHz, so on a 3.2 GHz or 7.5 GHz analyser the BNC adaptors are the first thing to run out.
- This is a 6 GHz kit. The SSA3075X and SVA1075X reach 7.5 GHz, and the SSG5000X range goes considerably higher. Between 6 GHz and the top of those instruments you are outside what these parts are specified for — use an 18 GHz cable instead.
Instruments it fits
Siglent specifies the kit for the SSA3000X and SVA1000X families. The interface it mates with is an N female port, so it fits the rest of our N-ported range too — each port below read from that instrument’s own datasheet.
| Series | Type | RF port | Frequency |
|---|---|---|---|
| SSA3000X series | Spectrum analyser | N female | 2.1 / 3.2 / 7.5 GHz |
| SSA3000X Plus series | Spectrum analyser | N female | 2.1 / 3.2 / 7.5 GHz |
| SSA3000X-R series | Real-time spectrum analyser | N female | up to 7.5 GHz |
| SVA1000X series | Spectrum + vector network analyser | N female | 1.5 / 3.2 / 7.5 GHz |
| SSG3000X series | RF signal generator | N female | 2.1 / 3.2 GHz |
| SSG5000X series | RF signal generator | N female | up to 20 GHz |
| SNA5002A / 5012A / 5004A / 5014A | Vector network analyser | Type-N female | 4.5 / 9 GHz |
The SSA5000A analysers and the SSG5000A / SSG6000A generators use a 2.92 mm port instead and are not covered by this kit.
Related items — and whether you need the kit at all
Both of the kit’s cables are also sold on their own, so it is worth being straightforward about when the kit is the right purchase and when it is not.
If you need one cable, buy that cable. If you are setting up a bench from scratch, or you keep hitting connections you cannot make, the kit is the better call — it adds four specified adaptors and the 10 dB pad, and it covers both SMA orientations and BNC without a second order. For reference, a standalone attenuator in the same class is listed below.
The same cable as the one in this kit, if you only need a spare.
Twice the attenuation when 10 dB is not enough. It is a BNC part, so it fits an N port through one of this kit’s N–BNC adaptors.
For work above 6 GHz, where this kit runs out of specification.
Looking for a different length, connector pair or bandwidth? The RF cables and adaptors page lists the full range with a table matching every Siglent instrument port to the cable it needs.
Not sure this is the right kit?
Tell us which instrument you have and what you are connecting to it, and we will confirm whether this kit covers it or point you at the individual cable that does. We are the official Siglent distributor for the European Union.
Downloads
Specifications are taken from the manufacturer’s official documentation and are provided for guidance only. They are subject to change without notice, and errors and omissions may occur. The manufacturer’s current datasheet is the definitive reference. Prices exclude VAT.