Main specification:

Output frequencies:0.2Hz～200kHz
Output Waveforms: square, sine, triangle, TTL pulse, single pulse
Output Amplitude:10mVp-p～10Vp-p(50Ω)(function),
                                      20mVp-p～20Vp-p(1MΩ)(function);
                                     "0" level≤0.8V, "1" level≥1.8V(TTL 600Ω);
                                      "0" level≤0.8V, "1" level≥1.8V(single pulse 600Ω)
Output Impedance: function：50Ω，TTL and single pulse：600Ω; sine distortion：≤2.5%, square edge≤200ns，triangle linearity＞90%
Frequency Display：4 LEDs; Attenuation: 0dB/20dB/40dB/60dB
Size and Weight：240×220×80(mm)3.2kg
Enclosure：same asw EE1641B1

Features
SMT production
Perfect Output Protection
High performance/price ratio

Main specification:

Output Frequency: 0.2Hz～3MHz (EE1641B1); 0.2Hz～10MHz (EE1642B); 0.2Hz～15MHz (EE1642B1);0.2Hz～20MHz (EE1643B)
7 waveforms such as sine, triangle, sqaure are available
Output Amplitude: 10Vp-p(50Ω) 20Vp-p(1MΩ)
Central Level, duty factor adjustablesquare edge：≤30nssine distortion：≤1%
Output Impedance：50Ω(function),600Ω(TTL/CMOS sync out)
Output Signal Attenuation：0dB/20dB/40dB/(20+40)dB
Frequency Range of Counter：0.2Hz～20MHz
Size and Weight：240×220×80(mm)3.2kg
50Hz point frequency output (optional)

Main features:
LSI used
Simultaneously displaying output amplitude (3 LEDs) and output frequency (5 LEDs)
To be used as a frequency counter (10MHz equal-precision)
Various output forms (point frequency, FM, internal/external sweep)
All-function output protection
SMT production, miniature structure design
High reliability，MTBF≥10000 hours
DC level adjustment function, output amplitude of CMOS adjustable
Electronic switch used
Product of bid by the Ministry of Education using loan from the World Bank

Main specification:

Output Frequency: ≥4W/10W(15Hz～40kHz)
Single pulse output available
Square aedge：70ns
Sine Distortion：≤1%
Size and Weight：232×280×85(mm)3, 3kg (EE1641D) 240×293×90(mm)3 metal enclosure, 3.5kg(EE1641D1)
For other specifications refer to that of EE1641B1

Main features:
Automatic protection from over current, over heat and short circuit
Manual output of level jump
Metal enclosure, built-in heat-sink，with same exterior of EE1641F
For other specifications refer to that of EE1641B1

Main specification:

Output Frequency：0.2Hz～3MHz (EE1641C); 0.2Hz～10MHz (EE1642C); 0.2Hz～15MHz (EE1642C1); 0.2Hz～20MHz(EE1643C)
Output Amplitude：10Vp-p(50Ω) 20Vp-p(1MΩ)
7 waveforms such as sine, triangle, sqaure are available
Duty factor of output waveform adjustable：20%～80%
DC Level Range：-5V～+5V(50Ω) -10V～+10V(1MΩ)
Square edge：≤20ns
Sine Distortion：≤1%
Output Impedance：50Ω(function out) 600Ω(sync out)
Output Signal Attenuation：0dB/20dB/40dB/60dB
Range of Frequency Counter：0.2Hz～100MHz
Single pulse output available
Point frequency output：50Hz (optional)
Power Output：10W/4Ω or 150kΩ/5kΩ(option)
Size and Weight：240×295×90 (mm), 3.5kg

Main features:
New generation of EE1640B Series
LSI circuitry
SMT production, miniature structure design
High reliability，MTBF≥10000 hours
Simultaneously displaying output frequency (8 LEDs) and output amplitude (3 LEDs), unit of amplitude display switchable from (Vp-p/Vrms)
Various modulation modes：AM,FM，FSK，Log/Linear sweep TTL/CMOS synch. Output and CMOS level adjustable
Can be used as a frequency counter(10MHz equal-precision)
DC/AF voltmeter available (optional)
RS-232/485 interface available (optional)
All-function output protection and error connection warning for main function output