RG-316

main product

High quality RG-316 coax cable with SMA male connectors

How it works

Inside the enclosure, the common port connects to a passive resistive splitter network. On the splitter side, the signal is divided three ways with equal voltage, current or power onto each port; used in reverse as a combiner, the same network sums the three input ports onto the single common port. Isolation between the three split/combined ports is maximum when the main port is properly terminated, so a mismatched or disconnected antenna on one port has minimal effect on the other two.

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Specifications

Frequency range	0.1 – 60 MHz
Ports	3-way + common port
Impedance	50 or 75 Ω (jumper select)
Insertion loss, typ.	around 1 dB
Split (incl. insertion loss)	4.8 dB / around 5.8 dB total
Isolation	>18 dB middle port, >23 dB 1st/3rd port
SWR, split ports	better than 1:1.15 (HF), 1:1.25 (6 m)
SWR, main port	around 1:1.3 (HF), 1:1.4 (6 m)
Connectors	SMA
Enclosure	Aluminium, W×H×L 58×24×50 mm
Usage	RX line only, assembled & tested

Specifications

General

Display	Resistive touch, 4.0", 480x320 pixels
Displayed points	max. 450 per scan
Power supply	5V USB (1.3 A max)
Battery operation	up to 10 hours
SD card slot	microSD, 32 GB card included
Audio output	3.5 mm jack

Spectrum Analyzer

Frequency range (normal)	100 kHz – 800 MHz
Frequency range (ultra)	100 kHz – 5.3 GHz
Signal monitoring	up to 12 GHz
Max. input level	+10 dBm (0 dB internal ATT)
Max. DC input	± 5 V
Input impedance	50 Ω (input ATT > 10 dB)
Compression point	1 dB at -1 dBm (0 dB internal ATT)
Phase noise	-108 dB/Hz @ 100 kHz offset, -115 dB/Hz @ 1 MHz offset
Dynamic range	70 dB (30 kHz RBW)
Absolute power level accuracy	± 2 dB (after calibration)
Resolution filters	Manual (0.2, 1, 3, 10, 30, 100, 300, 600, 850 kHz) or Auto
Built-in LNA (optional)	20 dB, Noise Figure 5 dB
Screen resolution	51, 101, 145, 290 or 450 points
Headphone output	AM only

Signal Generator

Sine wave output	100 kHz – 800 MHz
Output level	-115 dBm to -19 dBm
Square wave	up to 4.4 GHz
Calibration	1, 2, 3, 4, 10, 15, 30 MHz

Downloads & Resources

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📄 Download datasheet (PDF)

💾 Download firmware

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⚠ Make sure you have the correct connection. The port labeled IN is the N male connector and handles up to 200W of RF power — reversing the connection will destroy the attenuator.

⚠ For continuous power loads above 50W, the heatsink must be fan-cooled to ensure proper heat dissipation.

Firmware Instructions

Download the firmware and unzip the file. Rename it to FSI-1013.bin.
Select USB Connection on the oscilloscope and connect it to your computer. A new storage disk will appear — copy the downloaded firmware onto it.
Turn the device off and back on to display the upgrade interface. (There are two screen vendors used in this device, so two firmware files exist. If the screen isn't accurately sensitive after updating one, update the other and repeat the same steps.)

⚠ You can find the firmware file in our Attachments section.

💡 Despite its good adhesion, we recommend covering this tape with classic electrical tape to increase protection against sunlight and weather conditions.