VOLTCRAFT UTS-1980 User guide

Universal System

Instruction Manual

Catalogue

Brief …………………………………………………………………2

Ⅰ Panel Operation Instruction … ……………………………………3

Ⅱ Operation Cautions … … …………………………………………4

Ⅲ Frequency Counter (FC)Operation Instruction … … ……………5

Ⅳ Function Generator(FG) Operation Instruction …………………7

Ⅴ DC Power Supply (DPS)Instruction … …………………………10

Ⅵ Digital Multimeter (DMM) Instruction …………………………11

Ⅶ Accessories … … …………………………………………………31

Ⅷ Maintenance and Service …………………………………………31

Brief

Thanks for your purchasing universal system. To ensure the correct operations, please read the manual carefully before using

it. After that, please keep it well.

The instrument is produced according with the strict quality control standard. All the components are selected and aged in full range. It passes a series environmental experiments and it will be in optimum working state in the indicated working environment.

Service after sales: Please contact our customer service office if the instrument is defective to get effective service after sales.

Composition:

1. DDS signal generator: it adopts digital synthetic technology which can generate

5 waves of sine, square, triangle, pulse and TTL. The frequency range is 0.1Hz～ 10MHz.

2. Frequency Counter：The frequency range is 1Hz～ 2.7GHz with high measurement accuracy and can realize equal accuracy measurement.

3. DC Power Supply: It is composed of four groups’ outputs, 0～30V/0～ 3A adjustable voltage output, ＋ 15V/1A fixed voltage output, －15V/1A fixed voltage output and ＋5V/2A fixed voltage output.

4. DMM： It has about 50 kinds of measurement functions with multi display: master display 80000 count, slave display 80000 count and 20 segments of bar graph. The max. AC/DC voltage is up to 600V DC/450V AC and DC/AC current up to 10A. Resistor measuring range is 0.01Ω～80MΩ, 10MΩ～ 1000MΩ, capacitor measuring range is 1pF～100μF and the temperature range is -50～1300，-58～ 2372(with external sensor). It has 16 kinds of frequency (0.5Hz～5kHz) and adjustable pulse waveform output of 1%～ 99% duty cycle.

Ⅰ Panel Operation Instruction

Diagram of Front Panel

Diagram of Rear Panel Operation Instruction

○,1 Display window of FC ○,2 Reset of FC

○,

Data hold of FC ○,4 Gate time key of FC

○,

Channel select key of FC ○,6 Low pass filter key of FC

○,

CHB input of FC ○,8 CHA input of FC

○,

Frequency variable knob of FG ○,10 Keyboard operation zone of FG

○,

Input of ext amplitude of FG ○,12 TTL output of FG

○,

Signal output of FG ○,14 Duty variable knob of FG

○,

DC offset variable knob of FG ○,16 Amplitude variable knob of FG

○,

Output on/off control key of FG ○,18 Output impedance select key of FG

○,

Display control key of FG ○,20 Display window of DMM

○,

Auxiliary function key zone of DMM ○,22 Power switch of DMM

○,

Function keys zone of DMM ○,24 Input terminal of 10A current of DMM

○,

Input terminal of mA current of DMM ○,26 Input terminal of voltage and current

measurement

of DMM

○,

Common terminal of DMM ○,28 Voltage variable knob of DPS

○,

Current variable knob of DPS ○,30 Fix +5V/2A output terminal of DPS

○,

Constant current indicator of DPS ○,32 Fix ±15V/1A output terminal of DPS

○,

Voltage/current display select switch of

○,34 0～30V/0～3A output terminal of DPS

DPS

○,

Grounding terminal ○,36 Main power switch

○,

Display window of DPS ○,38 Power switch of FG

○,

Power switch of FC

○,40 10A current measurement fuse of DMM

○,41 mA current measurement fuse of DMM ○,42 AC115V/AC230V select switch

○,

Power socket

Ⅱ Operation Cautions

1. The instrument has already been done ex-factory inspection strictly. Please first

check whether the instrument is damaged or not during the transportation once the user opens the package box.

2. Don’t put it in chilly outside. The optimum operating temperature is 5°C～35°C.

3. Don’t expose it at the sunshine or heat source such as stove, for long time.

4. Don’t remove it from heat to chilly environment abruptly or vise versa which will

cause frozen in the inner.

5. Keep it from humidity, water and dust. Otherwise the instrument maybe occur

malfunctions. The optimum relative humidity is 35％～75％.

6. Keep it from the strong shocking environment. Otherwise the instrument maybe

occur malfunctions.

7. Keep it far away from the high magnetic field and don’t operate it near to

magnetic field. Do not expose it to strong sunshine or ultraviolets directly.

8. Don’t put other objects on it and don’t block the vent holes.

9. Don’t insert lead or pin into the vent holes.

10. Don’t drag it through cables.

11. Don’t put soldering iron on its surface or plastic frame.

12. Don’t invert it for long time during storage and transportation.

13. Check steps before operation：

13.1 Check voltage

Refer to the suitable working voltage as below before the power is on.

Rated voltage Working voltage

AC230V AC230V±10% AC110V AC99V～121V

13.2 Make sure the fuse should be suitable.

To avoid the circuit damage caused by over current, please use the correct fuse.

Power fuse: AC230V T250V 4A

Shape: 5×20mm Type: slow-break

DMM fuse: mA current: F 690V 1A

Shape: 10×38mm Type: fast-break 10A current division: F 690V 12.5A Shape: 10×38mm Type: fast-break

*Note: The voltage of the original fuses installed in this product is 690V. In

replacement of the fuse, please choose fuses of voltage higher than 600V.

Ⅲ Frequency Counter (FC) Operation Instruction

1. Technical Specifications

1.1 Freq. measurement range: CHA 1Hz～100MHz CHB 100MHz～2.7GHz

1.2 Input sensitivity: CHA 50mVrms for sine wave

150mVpp for pulse wave

CHB -13dB(100MHz~1GHz)

-7dB(1GHz~2.7GHz)

1.3 Measurement accuracy: ±(100ns/Gate Time+ Timebase Error+Trigger Error）x

the Frequency of the measured signal

Note: Time base Error: ≤10ppm(at normal temperature)

Trigger Error≤0.3% when SNR(Signal-to-Noise Ratio)>40dB

1.4 Dynamic Range: CHA 50Vrms~1.5Vrms

CHB -13dBm~+13dBm (100MHz-1GHz)

-7dBm~+13dBm (1GHz-2.7GHz)

1.5 Max. undamage voltage: CHA 35Vpp CHB 3Vpp

1.5 Input impedance: CHA 1MΩ//40pF

CHB 50Ω

1.6 Time base frequency: 10MHz

1.7 Resolution: ±(100ns/Gate times）x measured signal frequency

2. Basic Operation

2.1 Please check voltage and fuse before the power is on. Turn on main power switch

（○,36）and then turn on FC power switch（○,39）which is on the rear panel of instrument and then preheat 20 minutes.

2.2 After the power is on, the display window（○,1） of FC indicates “0000000”, the

indicator of CHA will be on. The strobe time is 1s and the indicator of strobe is on. The indicators of Hold and Low pass filter (LPF-A) will be off.

2.3 LPF-A key（○,6）: bandwidth about 100kHz at 3dB, Open LPF (indicator of

LPF-A will be on) to eliminate the HF disturb of the LF signal below 100 kHz which will make the measured result more reliable.

2.4 Channel key（○,5）: It is used to select the measured channel. CHA can be used to measure 1Hz ～ 100MHz signal frequency. CHB can be used to measure 100MHz～2.7GHz signal frequency.

2.5 For CHA,

a. When frequency is <100 kHz, please turn on the low pass filter (LPF-A).

b. When the amplitude of frequency is >5V, please use external attenuators, such

as oscilloscope-probes.

2.6 Strobe time select key（○,4）: It should choose a suitable strobe time if a suitable resolution is needed. Once the period of the measured signal is more than strobe time, the measurement time is regarded as a period time of the measured signal.

2.7 Data Hold（○,3）: Press it down, the Hold indicator will be on. Then the FC will stop measurement. The display window will always keep the last measured data even the signal frequency is changed or test dot is broken. Press Hold again, its indicator will be off. Then FC re-starts to measure and the display window will record new frequency measurement data.

2.8 Reset（○,2）: It is used to reset the FC.

2.9 Over-flow indicator（OFL）: When the measured signal frequency is over the

range, the over-flow indicator (OFL) will be on, and “ ” will be on the display window（○,1）.

2.10 When both FC and FG are working, both powers need to be turned on. To turn

off FG and keep FC working, please press the DISPLAY key (○,19). After the “F/C” indicator lights, the display window(○,1) shows the measured frequency by FC. Then turn off the FG’s power switch.

Ⅵ Function Generator (FG) Operation Instruction

1. Technical Specification

1.1 Waveform characteristic:

1.1.1 Waveform type: sine, triangle, square.

1.1.2 Sine harmonious wave distortion（1Vpp，50Ω）: ＜20kHz -50dBc

20 kHz～1MHz -40dBc 1MHz～10MHz -35dBc

1.1.3 Sine wave distortion: ≤1％（0.1Hz～100 kHz）

1.1.4 Square wave Rise/Fall time: ≤50ns（1MHz, 50Ω, output voltage 5Vpp）

1.1.5 Square overshot: ≤5％

1.1.6 Square duty cycle range: 15％～85％（≤10kHz）

1.1.7 Waveform asymmetry: ＜1.5％＋20ns of period（≤100 kHz）

1.1.8 Triangle linearity: ＜1％（≤100 kHz）

1.2 Frequency characteristic:

1.2.1 Frequency range: Sine wave 0.1Hz～10 MHz (50Ω)

Square wave 0.1Hz～1 MHz（200mVpp～10Vpp，50Ω） Triangle waveform 0.1Hz～1MHz

1.2.2 Frequency accuracy: ±（5×10-5＋80mHz）

1.2.3 Frequency stability: 50ppm（long term）(Generally, calibration at 1 time/year)

1.2.4 Max. Resolution: 0.01Hz

1.3 Amplitude Characteristic:

1.3.1 Output amplitude range: 100mVpp～20Vpp（High impedance）

1.3.2 Amplitude flatness: ±5％ (in 0.1Hz~10MHz at 50Ω)

1.3.3 Output impedance: 50Ω±10％/600Ω±10％

1.4 Overshot Characteristic：

1.4.1 DC offset range: Vpp AC＋DC: ±10V（600Ω）; ±5V（50Ω）

1.5 Sweep Frequency Characteristic:

1.5.1 Type: Linearity or Log

1.5.2 Sweep frequency: Negative or positive

1.5.3 Sweep range: 1Hz～10MHz

1.5.4 Sweep freq velocity: 0.01Hz～100Hz

1.6 Attenuation:

1.6.1 Attenuation: -20dB

1.6.2 Error: ±3％(open circuit）

1.7 External Amplitude Input:

1.7.1 Input impedance: 1kΩ

1.7.2 Ext amplitude freq range: 0.1Hz～20kHz（the output impedance of modulation

source is 50Ω）

1.7.3 Ext amplitude sensitivity: 0～5Vpp±2%

1.7.4 Amplitude depth: 0～100％

1.8 TTL Output:

1.8.1 Output amplitude: “0” level ≤0.3V; “1” level ≥3.3V

1.8.2 Output impedance: 50Ω ±10％

2. Panel Layout

○,

2.1 There are 3 ports on panels, signal output port（ port（

○,

）and ext amplitude signal input port（○,11）.

）, TTL synchronized output

2.2 There are four variable knobs on panels, freq variable knob（○,9）to adjust output frequency of signal and change setting of sweep frequency parameter, Duty variable knob（○,14）used to adjust duty ratio of square wave, DC offset variable knob（○,15） used to adjust DC offset of signal and Amplitude variable knob （○,16） used to adjust amplitude of the output signal.

2.3 There are 14 keys on keyboard operation zone: 10 number keys (number【0】～【9】);2 direction keys（left【＜】, right【＞】）; 1 decimal point（【.】）; 1 OK key（【OK】）. There are three function keys: One is signal output switch （○,17）which is used to control whether FG output signal or not. Press it, FG output is switched between on/off state. The indicator above the key is corresponding to the FG output state; the secondly is output impedance key （○,18）, the indicator above the key is corresponding to FG output impedance. Press it, FG output impedance will be switched between 50Ω and 600Ω; The

○,

thirdly is display function switch key ( function of window（

○,

）. When the F/C indicator is on, the display window will

) which is used to change the display

be used to display the measured frequency of the FC and when F/G indicator is on, the display window will be used to display the frequency of the FG. Once the power is on, the default state of the display window（○,1） is to display the frequency of the FG.

2.4 The secondary function key: Once the power is on, the indicator “FUNC” above key 【OK】 will be on. The below keys, keys【1】～【7】, decimal point 【.】and 【OK】, are used for the second functions which are indicated above the keys,

3. Basic Operation

3.1 FC display window（○,1）displays frequency. 6 digits of FG.

3.2 The frequency can be adjusted by hand wheel or enter numbers directly.

Once the power is on, the default output frequency is 1 kHz. At the time, number “1” is flashing. Remove the flashing number horizontally by【＜】 and【＞】and the flashing number can be changed through rotating the hand wheel. Press【 .】, indicator “Range” above 【.】 will be on. Then the frequency unit indicator will be flashing to indicate which unit should be applied to the value shown on the display window （○,1）. Rotate the hand wheel; the value will be changed as ×10 times or 1/10 times each time. Press 【.】 again, the “Range” indicator will be off and re-start adjustment mode by hand wheel. Press【OK】, “Func” indicator will be off, frequency on window is cleared and enter into state of entering numbers directly. All the entered numbers will be flashing and they are can be deleted freely from left to right through【＜】, which can correct the numbers. And also units, such as MHz, kHz, Hz, can be selected through【＞】. Press【OK】 again after entering numbers, the key of “Func” will be on; the signal frequency will be displayed on frequency window.

3.3 The operation of Secondary function key.

Once the power is on, the “Func” indicator above 【OK】will is on. Parts

of keys are corresponding to the secondary functions which are indicated on panel. 【-20dB】： Press【1】，the indicator “-20dB” will be on. The attenuation amplitude of output signal is -20dB of the original output amplitude. Press the key again, the indicator “-20dB” will be off, the amplitude of output signal will not be attenuated. 【Duty】： Press【2】，the indicator above “Duty” will be on. Adjust the Duty cycle variable knob（○,14） to change duty ratio of square wave. Press the key again, the indicator “Duty” will be off, the output duty cycle of square wave is 50%. At the time, the Duty variable knobs（○,14）do not work. 【Offset】：Press【3】，the indicator above “Offset” will be on. Adjust the DC offset variable knob（○,15）, DC offset of output waveform can be adjusted. Press the key again, the indicator “offset” will be off, the output waveform is back to normal. At the time, the DC offset variable knob

（○,15）won’t be work. 【Wave】：When the power is on, the default output of FG is sine wave.

The ”Sine” indicator will be on. Once press number 【4】 each time, output waveform of FG will be switched between sine, square and triangle in turn.

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