Key Features of SG8 RF Signal Generator

• Output frequency range: 10 MHz – 8 GHz
• Frequency resolution: < 0.001 Hz
• Spectral purity
  • non-harmonics (typ.):
    HPSS (auxiliary option): −65 dBc
    HP (default option): −50 dBc
  • harmonics: −30 dBc
  • phase noise: −120 dBc/Hz @ 1GHz, 10 kHz offset
• Output level: up to +28 dBm
• Absolute level accuracy (typ.): ±0.1 dB
• Phase shift control
• adjusting range: 360°
• min. step: 0.15° @ 1GHz
• External input reference frequency
• range: 20 – 150 MHz
• Remote control: RS-232, USB
• Dimensions: H x W x D: 2U x 42HP(½ 19”) x 315 mm

Frequency Parameters of Advantex SG8 RF Signal Generator

Frequency parameters of RF signal

Parameter	Conditions	min.	typ.	max.	Unit
Range		3.90625		8000	MHz
Resolution	over entire range			0.28·10–3	Hz
Settling time	from rising edge at AUX In input (frequency switching over entire range)	2.5		4.5	ms
Phase shift resolution*	fOUT = fREF		0.022°

* Phase shift resolution equals (360°/2¹⁴)·f_out/f_ref , where f_out – output frequency, f_ref – reference frequency

Reference frequency parameters

Parameter	Conditions	min.	typ.	max.	Unit
Internal reference frequency source
Frequency			147		MHz
Accuracy	at 25°C		±5		ppm
Temperature effect	0..+50°C		±5		ppm
Reference frequency output (REF Out)
Output impedance			50		Ω
Signal level (internal source)	SG8-HP	−3.5	0	+4.5	dBm
	SG8-HPSS	−5		+5	dBm
Gain (when repeating external source fed to REF In input)	SG8-HP	−1		+1	dB
External reference frequency input (REF In)
Input impedance			50		Ω
Level		−10		+10	dBm
Frequency		20		150	MHz
Spur level (allowable at the REF In input for the PLL to lock)	|foffset|≤1MHz, fref=20MHz			−70	dBc
	|foffset|≤1MHz, fref=100MHz			−60	dBc

Spectral parameters of Advantex SG8 RF Signal Generator

Spectral characteristics of RF output signal

Parameter	Conditions	min.	typ.	max.	Unit
2-nd Harmonic (10MHz≤fOUT≤8GHz)	POUT=0dBm		−40	−35	dBc
	POUT=+10dBm		−30	−25
	POUT=+20dBm		−25	−20
3-rd Harmonic (10MHz≤fOUT≤8GHz)	POUT=0dBm		−60	−50	dBc
	POUT=+10dBm		−50	−45
	POUT=+20dBm		−40	−35
Non-harmonics*, 4GHz<fOUT≤8GHz	SG8-HP, |foffset|≤1MHz, POUT≥+0dBm		−50		dBc
	SG8-HPSS, |foffset|≤1MHz, POUT≥+0dBm		−65
	SG8-HP, |foffset|≥1MHz, POUT≥+0dBm		−70
Far offset noise level	|foffset|≥1MHz, POUT=+20dBm, fOUT=8GHz		−145	−140	dBc/Hz
Phase noise, POUT=+20dBm, fOUT=1GHz, @ offset:	1kHz		−114		dBc/Hz
	10kHz		−120
	100kHz		−120
	1MHz		−132
	10MHz		−135
RMS Jitter	fOUT=8GHz, BW from 1kHz to 10MHz		70		fs
Residual FM			2.8		kHz
Residual φM			0.2		deg
Integral phase noise			−52		dBc

* At lower frequency bands the non-harmonics level is improved (i.e. decreased) in proportion to −6 dB per octave

Phase noise

Level Specifications of Advantex SG8 RF Signal Generator

Amplitude parameters of RF signal

Parameter	Conditions	min.	typ.	max.	Unit
Range		−20		+28	dBm
Calibrated area (APC loop lock range)	max.	−10		+26	dBm
	min.	−10		+22
Resolution		0.05			dB
Absolute level accuracy	25MHz≤fOUT≤8GHz, 0≤POUT≤20dBm		±0.1	±0.2	dBm
	25MHz≤fOUT≤8GHz, for POUT within calibration area		±0.3	±0.5
Temperature effect			0.01		dB/°C
VSWR	50Ω load, 50MHz≤fOUT≤8GHz		1.8	2.1
Settling time	from rising edge of triggering signal at AUX In input, when switching within 20dB from initial level value	2	2.5	3	ms
Acceptable DC voltage at RF Out		0		8	V

Actual signal level vs. frequency at various levels set to the instrument

Absolute level accuracy