SS7000 Series

Universal Frequency Counter


* Minimum measuring resolution 11 digits/s

* Time resolution 25ps (typical)

* Maximum frequency’s measurement can reach to 40GHz


* Measures Frequency, Period, Duty Cycle, Frequency

Ratio, Totalize,

* Phase Difference, Pulse Width, Time Interval and DCV.

* Utility statistics functions of multi-average,


* Standard deviation and Allan Variance for frequency


* Stores 15 group status

* High-stability crystal oscillator is optional

Product Model




SS7200A SS7300 SS7400 SS7402
Measuring Functions
Frequency Range CH 1:  0.001Hz ~ 200MHz
CH 2:  0.001Hz ~ 200MHz
CH 3:  options 3GHz/6.5GHz/12.4GHz/16GHz/20GHz/26.5GHz/40GHz
Display Resolution 8 digits/s 10 digits/s 11 digits/s 11 digits/s
Period 5ns ~ 1000s
Time Interval Range 10ns ~ 10000s 1ns ~ 10000s
Time Resolution 2.5ns 500 ps 150ps 25 ps
Pulse Width 30ns ~ 5000s 1ns ~ 10000s
Duty Cycle 1% ~ 99%
Totalize 0 ~ 1×1013
Phase Difference 1° ~ 359°
Dynamic Range 50mVrms ~ 1.0Vrms (Sine), 150mVPP ~ 4.5VPP(Pulse)
Input Impedance 1MΩ//35pF or 50Ω
Input Attenuation ×1 or ×10
Trigger Level -5.000V ~ +5.000V
Other Functions
Frequency Ratio
Up/Low Limit “Limit” light on shows the result out of range, off shows within range
Statistics Calculation Multi-average, Max.,Min., PPM, SD, Allan Variance
Standard Time Base
Accuracy 5×10-8
Daily Aging 1×10-8/day
Optional Time Base
Accuracy 5×10-8
Daily Aging 5×10-10/day
Channel Options
Frequency Range Dynamic Range
3.0GHz 100MHz-3GHz A. -27dDm~+19dBm (100MHz~2.6GHz)

-15dBm~+19dBm (2.6GHz~3.0GHz)

100MHz-3GHz B. -27dBm~+19dBm
6.5GHz 200MHz-6.5GHz -15dBm~+13dBm
12.4GHz 6.5GHz~12.4GHz -15dBm~+10dBm
16.0GHz 6.5GHz~16GHz -15dBm~+10dBm
20.0GHz 200MHz-20GHz -10dBm~+10dBm (200MHz~350MHz)
-15dBm~+10dBm (350MHz~18GHz)
-10dBm~+10dBm (18GHz~20GHz)
26.5GHz 10GHz-26.5GHz -20dBm~+10dBm (10GHz~20GHz)
-15dBm~+10dBm (20GHz~24GHz)
-10dBm~+10dBm (24GHz~26.5GHz)
40GHz 18GHz~40GHz -29dBm~+15dBm (18GHz~20GHz)
-20dBm~+15dBm (20GHz~28GHz)
-29dBm~+10dBm (28GHz~37GHz)
-20dBm~+13dBm (37GHz~40GHz)
Damage Level +20dBm
General Characteristics
Interface Standard USB USB, RS-232 USB, RS-232 RS-232, GPIB
Optional RS-232, GPIB GPIB GPIB
Power AC220V(10%) or AC110V(10%), 50Hz(5%) OR 60Hz(5%)
AC220V (1 ±10%), 50Hz(1±5%)<70VA (for SS7402 and SS7400)
Dimension & Weight 375×105×235mm
3.7kg 3.7kg 4.2kg 5.2kg


Standard Accessories

Power Cord:1pcs

BNC Testing cable:1pcs

CD(Software+ User’s Guide):1pcs


25ps Universal Frequency Counter