Stanford SR620 Frequency Counter (1.3 GHz)

Timebase:

Frequency: Standard: 10.000 MHz; Option 01: 10.000 MHz

Type: Standard: TCVCXO; Option 01: Ovenized VCXO

Aging: Standard: 1 × 10-6/yr; Option 01: 5 × 10-10/day

Allan variance (1 s): Standard: 3 × 10-10; Option 01: <5 × 10-12

Stability 0 to 50 °C: Standard: 1 ppm; Option 01: <2 × 10-9

Settability: Standard: 0.01 ppm; Option 01: 0.001 ppm

Time Interval, Width, Rise/Fall Time:

Range: -1000 to +1000 s in +/-TIME mode; -1 ns to +1000 s in all other modes

Trigger rate: 0 to 100 MHz

Display LSD: 4 ps single sample, 1 ps with averaging

Resolution:

Std. timebase: (((25 ps typ. [50 ps max.])2 + (0.2 ppb × Interval)2) / N)1/2 rms

Option 01: (((25 ps typ. [50 ps max.])2 + (0.05 ppb × Interval)2) / N)1/2 rms, (N = sample size)

Error: <±(500 ps typ. [1 ns max.] + Timebase Error × Interval + Trigger Error)

Frequency:

Range: 0.001 Hz to 300 MHz via comparator inputs. 40 MHz to 1.3 GHz via internal UHF prescalers. RATIO A/B range: 10-9 to 103

Error: <±((100 ps typ. [350 ps max.])/Gate + Timebase Error ) × Frequency

Period:

Range: 0 to 1000 s; RATIO A/B range: 10-9 to 103

Error: <±((100 ps typ [350 ps max])/Gate + Timebase Error) × Period

Phase:

Definition: Phase = 360 × (Tb - Ta) / Period A

Range: -180 to +180 degrees, 0 to 100 MHz

Resolution: (25 ps × Freq. × 360 + 0.001)°

Error: <±(1 ns × Freq. × 360 + 0.001)°

Counts:

Range: 1012, RATIO A/B range: 10-9 to 103

Count Rate: 0 to 300 MHz

Gates: Same as frequency

Display: 12 digits

Inputs:

Bandwidth: 300 MHz, 1.2 ns rise time

Threshold: -5.00 to +5.00 VDC (10 mV resolution)

Accuracy: 15 mV + 0.5 % of setting

General:

Operating: 0 °C to 50 °C

Power: 70 W, 100/120/220/240 VAC (+5 %, -10 %), 50/60 Hz

Dimensions: 14" × 3.5" × 14" (WHL)

Weight: 11 lbs.

Datasheet

Manual