Global Specialties 1332A User Manual

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1332A

REGULATED

DC POWER SUPPLY

Instruction Manual



M-00149 EDITION : 2- JULY, 2001

GLGL

OBOB

GLGL

Global Specialties,LLC

22820 Savi Ranch Parkway Yorba linda,CA 92887 WWW.globalspecialties.com 800-572-1028

AL SPECIALAL SPECIAL

AL SPECIAL

OBOB

AL SPECIALAL SPECIAL

TIESTIES

TIES

TIESTIES

PCB Components Z-TR/01 PCB REV - 01 ======================================================================= Ref Designator Value =======================================================================

RESISTORS

R1 1K,2W,5%,MOR R2 0.1E,2.5W,5%,WW R129* 33K,0.25W,5%,MFR

CAPACITORS

C1 0.1uF,50V,CD C2 100uF,50V,EL C3 10uF,50V,EL

DIODE

CR1 1N5402 X 2

TABLE OF CONTENTS

GENERAL INFORMATION............................ Page 1

SPECIFICATIONS......................................... Page 2

LOCATION AND DESCRIPTION OF

OPERATING CONTROLS.............................. Page 4

INSTALLATION.............................................. Page 5

PCB Components CHASSIS & FRONT PANELS ======================================================================= Ref Designator Value =======================================================================

CHASSIS

VARISTOR FOR 115V - 201K

FOR 230V - DNR 20D 361 FILTER YUNPEN EMI 6A/125V/250V MAINS TRANSFORMER 650VA INPUT FUSE FOR 115V - 5Amp TYPE T

FOR 230V - 2.5Amp TYPE T

FRONT PANEL

WW POT 1KE 1W X 2 WW POT 10KE 1W WW POT 50E 1W

LED GREEN 3mm LED RED 3mm

ON/OFF SWITCH DPST CHILLY 3022 6A /125V/250V

OPERATING INSTRUCTIONS....................... Page 6

POWER SUPPLY OPERATION .................... Page 8

SAFETY INSTRUCTION ............................... Page 9

OPERATING PRECAUTIONS........................ Page 10

CASE DISASSEMBLY AND ASSEMBLY....... Page 11

MAINTENANCE AND RECALIBRATION........ Page 11

SERVICE AND WARRANTY INFORMATION. Page 12

PART LIST.................................................... Page 13

SCHEMATIC AND BOARD LAYOUT.............. Page 20

LIST OF ILLUSTRATIONS

FIGURE 1. Location of operating controls...... Page 4

GENERAL INFORMATION

DESCRIPTION

The 1332A Power Supply is a high perfomance single output DC power supply for industrial and laboratory use. Performance with economy have successfully been combined to provide a compact, fully solid state instrument.

The output is continuously variable from 0 to 32V and can supply 5A max, and can be adjusted continuously throughout the output range. The front panel CURRENT control can be used to establish the output current limit (overload or short circuit). When the supply is used as a constant voltage source the VOLTAGE controls can be used to limit the output voltage. When the unit is used as a constant current source, CURRENT controls can be used to limit the output current. The unit will automatically cross over from constant voltage to current mode and vice-versa, if the output current or voltage exceeds these preset limits. Output voltage and current are continuously monitored on two front panel meters.

The load terminals are provided on the front panel. Either the positive or negative output terminal may be grounded or the power supply can be operated floating at upto a maximum of ±300VDC above ground.

All the outputs are floating i.e. neither the output positive terminal nor the negative terminal (nor any point within the regulator circuitry) is connected to ground.

The power supply is designed to operate in ambient temperature of upto 40°C and full output may be drawn continuously provided free air circulation is allowed.The unit works from mains supply of 115V/230VAC, 47-63 Hz with selectable Switch.

PCB Components 2 X Z-DPM/01 PCB REV - 01 ======================================================================= Ref Designator Value =======================================================================

RESISTORS

R1 39K,0.25,5%,MFR R2 470K,0.25W,5%,MFR R3 1M,0.25W,5%,MFR R4* SEL(INPUT) R5 10K,0.25W,5%,MFR R6 2K4,0.25W,5%,MFR R7 330E,0.25W,5%,MFR R8 330E,0.25W,5%,MFR R9 6K8, 0.25W,5%,MFR

PRESETS

PR1 2.5K,LIN,VER (REF ADJ)

CAPACITORS

C1 220pF,50V,CD C2 0.1uF,100V,MP C3 0.01uF,50V,CD C4 0.47uF,100V,MP C5 0.1uF,100V,MP C6 0.1uF,100V,MP C7 10uF,50V,EL C8 0.1uF,50V,CD C9 10uF,50V,EL C10 0.1uF,50V,CD

IC’s

IC1 7107 DECODER DRIVER VR1 TL - 431

FND’s

DS1 TSD566 GREEN

DS2 TSD566 GREEN DS3 TSD566 GREEN

LED’s

LED1* 3MM GREEN(VOLTAGE) FOR 'CV' MODE LED2* 3MM RED (CURRENT) FOR 'CC' MODE

MISCILLANEOUS

J1 2.54PITCH,3PIN M J2 NOT USED. J3 2.54PITCH,4PIN M

PCB Components ZSDT-CT/05 PCB =======================================================================

Ref Designator Value

=======================================================================

ZENERS

Z1 1N758, 10V, 0.4W Z2 1N758, 10V, 0.4W Z3 1N750, 4.7V, 0.4W

BRIDGE

BR1 10A/600V PC MTG BRIDGE BR2 CSB-1, 100V/1A BRIDGE.

SPECIFICATIONS

Detailed specifications of the power supply are given in the following table.

OUTPUT VOLTAGE : 0-32V DC continuously variable

with coarse and fine voltage controls

LOAD CURRENT : 0-5 Amp max., continuously

variable with coarse and fine controls

ICs

IC1 4N25 OPTO IC2 7812 IC3 TL431 IC4 LM324 IC5 7812 IC6 TL431 IC7 79L05 IC8 7805

TRANSISTORS/FET/SCR

Q1 BC109 Q2 MPSA12 Q3 BC557 Q4 BC557 Q5 BC547 FET1 IRFP150 SCR1 2N6396 FET2 IRFP150

CONNECTORS

CON2 2.54mm PITCH, 12PIN M CON3 2.54mm PITCH, 12PIN M L TYPE CON4 2.54mm PITCH, 8PIN M

MISCELLANEOUS

TP1 RIM PIN MALE TP2 RIM PIN MALE TP3 RIM PIN MALE TP4 RIM PIN MALE TP5 RIM PIN MALE TP6 RIM PIN MALE SPADE CON 12H750

CONSTANT VOLTAGE MODE REGULATION LINE : Less than ± 0.01% +2mV for

±10% change in line voltage.

LOAD : Less than ± 0.01% + 2mV for load

change from zero to full load.

RIPPLE & NOISE : Less than 1mV rms max.

( 20Hz - 20MHz )

CONSTANT CURRENT MODE REGULATION LINE : Less than ± 0.1% +250µA

for ±10% change in line voltage.

LOAD : Less than ±0.1% +250µA

for change in output voltage from 0 volts to max.output voltage.

RIPPLE & NOISE : 0.04% rms.(2.0 mA )

OUTPUT POLARITY : Floating w.r.t. ground. OVERLOAD PROTECTION : Automatic overload and

short circuit protection.

TRANSIENT RESPONSE : 100µsecs to within 10mV of

set output voltage for load change from 10% to 90%.

STABILITY

Total drift within 8 hours, : ±0.1% +2.5mV in constant

voltage mode.

after warm up under : ±0.5% +2mA in constant

current mode. constant line,load & temp.

PANEL METERS : Digital panel meters

(marked V for voltmeter and A for ammeter) are provided with an accuracy of ± 3 counts.

PCB Components ZSDT-CT/05 PCB =======================================================================

Ref Designator Value

========================================================================

C20 220µF/50V, ELE C21 47µF/50V, ELE C22 10µF/50V, ELE C23 0.1µF/50V, CD C24 10µF/50V, ELE C25 10µF/50V, ELE

C26 0.1µF/50V, CD C27 470µF/50V, ELE C29 1000µF/35V,ELE

MODE INDICATION : Respective LED lights up

when the unit is working in CV or CC mode.

OUTPUT CONTROLS : Single turn coarse and fine

voltage and current controls are provided on the front panel

OPERATING TEMP. : 0-40°C.

INPUT VOLTAGE : 115V / 230V AC, ± 10%,

47 - 63Hz single phase

DIMENSIONS ( W x D x H ) : 230mm x255mm x133mm

WEIGHT : 9.0Kg. nett. Approx.

DIODES

CR1 Not Used CR2 1N4007, 1KV/1A CR3 1N4007, 1KV/1A CR4 1N4007, 1KV/1A CR5 1N4007, 1KV/1A CR6 1N4007, 1KV/1A CR7 1N4007, 1KV/1A CR8 1N4007, 1KV/1A CR9 1N4007, 1KV/1A C10 1N4007, 1KV/1A CR11 1N4007, 1KV/1A CR12 1N4007,1KV/1A. CR13 1N4007,1KV/1A. CR14 1N4007,1KV/1A CR15 1N4007,1KV/1A CR16 1N4007, 1KV/1A CR17 1N4007, 1KV/1A CR18 1N4007, 1KV/1A CR19 1N4007, 1KV/1A CR20 1N4007, 1KV/1A CR21 1N4007, 1KV/1A

CR22 1N4007, 1KV/1A

CR23 1N4007, 1KV/1A

CR24 1N4007, 1KV/1A CR25 1N4148, 100V/10mA CR26 1N4148, 100V/10mA CR27 1N4148, 100V/10mA CR28 1N4148, 100V/10mA CR29 1N4007, 1KV/1A CR30 1N4007, 1KV/1A

PCB Components ZSDT-CT/05 PCB =======================================================================

Ref Designator Value

========================================================================

R37 2K, MFR, 1/4W, 5% R38 1K, MFR, 1/4W, 5% R39 1K, MFR, 1/4W, 5% R40 4.7K, MFR, 1/4W, 5% R41 330K, MFR, 1/4W, 5% R42 100E, MFR, 1/4W, 5% (I CAL) R43* 3.9K, MFR, 1/4W, 5% (I CAL) R44 1K, MFR, 1/4W, 5% R45 1K, MFR, 1/4W, 5% R46* 10K, MFR, 1/4W, 5% (V CAL) R47* 100E, MFR, 1/4W, 5% (V CAL) R48 2K, MFR, 1/4W, 5% R49 Shorting Link R50 Shorting Link R51 10E, MFR, 1/4W, 5% R59 10E, MOR, 2W

LOCATION AND DESCRIPTION OF

OPERATING CONTROLS

In order to use the full capabilities of the 1332A, it is highly recomended that the user become familiar with the controls associated with this instrument. (See Figure 1)

PRESETS

PR101 5K, PRE, LIN, (V)(DEV. DROP) PR102 500E, PRE, LIN, (V)(V CAL) PR103 500E, PRE, LIN, (V)(I CAL)

CAPACITORS

C1 0.1µF/100V, MP C2 0.1µF/250VAC MKP C3 15,000µF/50V ELE C4 0.1µF/50V, MP 10% C5 33µF/50V, ELE C6 100µF/50V, ELE C7 100µF/50V, ELE C8 1µF/50V, ELE C9 4.7µF/50V, ELE C10 10µF/50V, ELE C11 100µF/50V, ELE C12 47µF/50V, ELE C13 1kpF/50V, CD C14 1kpF/50V,.CD C15 0.1µF/50V, CD C16 10µF/50V, ELE C17 10µF/50V, ELE C18 0.1µF/50V, CD C19 220µF/50V, ELE

Figure 1. Location of operating controls.

1-Power ON/OFF switch. 7-Current Fine Control Clockwise

rotation increases variable output

current in CC mode. 2-Supply LED Display. 8-CV LED Display Voltage 0 to 32VDC Constant Voltage mode Indication

3-Supply LED Display. 9-CC LED Displays current 0 to 5AMP. Constant Current Mode Indication

4-Variable coarse voltage control. 10-Output terminals Clockwise rotation increases Red terminal is output (+)ve. variable o/p voltage in CV mode. Black terminal is output (-)ve.

5-Variable fine voltage control. 11-Ground terminal. Clockwise rotation increases variable output voltage in CV mode.

6-Current coarse Control. Clockwise rotation increases variable output current in CC mode.

INSTALLATION

INITIAL INSPECTION : As soon as the power supply

unit is unpacked inspect for any damage that may have occured during transit. Save all packing material until inspection is completed. If any damage is found, notify the carriers immediately. Our authorised representatives should also be notified.

PHYSICAL CHECK : This check should confirm that there are no broken knobs or connectors, that the cabinet and panel surfaces are free of dents and scratches and the meters are not scratched and cracked.

ELECTRICAL CHECK : The power supply unit should be checked against electrical specifications.An in-cabinet performance check will verify proper operation.

INSTALLATION DATA : The power supply unit is shipped ready for bench operation. It is necessary only to connect the unit to a rated source of power and it is ready for operation.

LOCATION : The power supply unit is naturally cooled.Sufficient space should be kept around the unit while in operation, so that heat sinks do not remain in confined space or close to another heating source.The ambient temperature of the area around the unit should be less than 40°C.

INPUT POWER REQUIREMENTS : The power supply unit may be operated continuously from input voltage of 115V / 230V 47-63Hz power source with selectable Switch. REPACKAGING FOR SHIPMENT : To ensure safe shipment of the power supply unit, it is recommended that the package designed for the unit be used. The original packaging material is reusable. Be sure to attach a tag to the unit specifying the owner, and the fault observed with a brief description. REMOVING COVER : The top cover is retained in place by 6 self tapping screws & two handle mounting screws. To remove cover, proceed as follows : a) Remove the handle mounting screws. b) Remove the self tapping screws on sides. c) Lift the cover from rear side, slide backwards & pull.

PCB Components ZSDT-CT/05 PCB =======================================================================

Ref Designator Value

========================================================================

PRESETS

PR101 5K, PRE, LIN, (V)(DEV. DROP) PR102 500E, PRE, LIN, (V)(V CAL) PR103 500E, PRE, LIN, (V)(I CAL)

CAPACITORS

SECTION 5

PART LIST & SCHEMATICS

OPERATING INSTRUCTIONS

PCB Components ZSDT-CT/05 PCB =======================================================================

Ref Designator Value

========================================================================

RESISTORS

R1 270E, 2W, 5%, MOR R2 47E, MFR, 1/4W, 5% R3 10K, MFR, 1/4W R4* 1K, MFR, 1/4W, 5% R5 10E, MFR, 1/4W, 5% R6 3.9K, MFR, 1/4W R7 3.3K, 2W, 5%, MOR R8 10K, MFR, 1/4W R9 8.2K, MFR, 1/4W R10 100K, MFR, 1/4W R11 4.7E, MFR, 1/4W. R12 1.5K, MFR, 1/4W. R13 180K, MFR, 1/4W. R14 390E, MFR, 1/4W. R15 6.8K, MFR, 1/4W, 5% R16 12K, MFR, 1/4W, 5% R17 3.9K, MFR, 1/4W, 5% R18 10K, MFR, 1/4W R19 10K, MFR, 1/4W R20 10K, MFR, 1/4W R21 3.3K, 2W, 5%, MOR R22 270E, 2W, 5%, MOR R23# 82K, MFR, 1/4W, 5% R24 4.7K, MFR, 1/4W, 5% R25 24E, MFR, 1/4W, 5% R26 820E, MFR, 1/4W, 5% R27# 330K, MFR, 1/4W, 5% R28# 39K, MFR, 1/4W, 5% R29# 180K, MFR, 1/4W, 5% R30 1K, MFR, 1/4W, 5% R31 15E, MFR, 1/4W, 5% R32 6.8K, MFR, 1/4W, 5% R33 15K, MFR, 1/4W, 5% R34 6.8K, MFR, 1/4W, 5% R35 15K, MFR, 1/4W, 5% R36 1K, MFR, 1/4W, 5%

13 6

TURN ON SETTING PROCEDURE

The following procedure describes the use of controls and indicators. a. Ensure that the AC power switch is in the "OFF"

position.

b. Connect the unit to a specified input voltage.

c. Turn the VOLTAGE and CURRENT controls fully

counter-clockwise.

d. Set ‘POWER ON’ Switch to "ON" position,The front

panel digital meters will light up and voltmter and ammeter displays will read zero,and observe that CV LED glows.

e. Adjust the ”VOLTAGE” controls till the desired

voltage is indicated on voltmeter.

f. To check "CONSTANT CURRENT" mode, turn

OFF the supply. Short circuit the output terminals of the power supply and turn ON the supply.

g. Adjust 'CURRENT' controls until the desired out

put current is indicated on ammeter. Also check that the CC LED glows.

h. Remove the short circuit.

CONSTANT VOLTAGE MODE :

To select a constant voltage output, proceed as follows : a. Connect a digital voltmeter (DVM) across the out

put terminals, observing correct polarity. The DVM must be rated for better than 0.5% accuracy.

b. Turn the CURRENT controls clockwise. And

Slowly If a load change causes the current limit to be exceeded, the power supply will automati cally cross over to constant current output at cur rent limit and output voltage will drop proportion ately. In setting the current limit, allowance must be made for high peak currents which can cause unwanted crossover.

CONSTANT CURRENT MODE :

To select a constant current output, proceed as follows :

a. Short circuit the output terminals of the power supply. b. Connect a DC Ammeter OR a shunt-digital voltmeter

(DVM) combination across the output terminals,

using appropriately-guaged wire and hardware. The recommended current ratings for the ammeter or

he shunt and the wire must be at least 10% more

than the output current of the power supply model.

The ammeter or shunt-DVM combination must be

rated better than 0.5% accuracy. c. Turn the VOLTAGE controls clockwise. And Turn the

CURRENT controls slowly clockwise. The CURRENT

control range will be from minimum to maximum

rated output current. Adjust CURRENT controls for

desired output current. d. Compare the ammeter reading with the front panel

ammeter reading. Or, compare the DVM reading with the front panel ammeter reading using I = V/R, where

V is the DVM reading and R is the DC shunt resistance. e. Open output terminals and adjust VOLTAGE

controls for maximum output as required by the load conditions.

If a load change causes the voltage limit to be exceeded, the power supply will automatically cross

over to constant voltage output at the preset voltage limit and output current will drop proportionately. In

setting voltage limit, allowance must be made for

high peak voltages which can cause unwanted

crossover. Turn the VOLTAGE controls clockwise and

observe both the front panel voltmeter and the

DVM. Compare the DVM reading with the front

panel voltmeter reading to verify the accuracy of the

internal voltmeter c. The VOLTAGE control range will be from minimum to the maximum rated output voltage. Adjust desired

voltage by adjusting the voltage controls. d. Short circuit output terminals and adjust CURRENT

controls for maximum output current as required by

the load conditions.

SERVICE AND WARRANTY INFORMATION

FACTORY SERVICE AND REPAIR :

Global Specialties will service and repair this instrument free of charge for a period of one full year subject to the warranty conditions stated below. To obtain a return merchandise authorisation (RMA) required for all returns, phone our customer service department for a RMA and all shipping instructions :

GLOBAL SPECIALTIES

70 Fulton Terrace, New Haven, Connecticut 06512, TEL.: (203) 466 – 6103 FAX : (203) 468 – 0060 Email : eblaur@aol.com

ATTN : Customer Service Department

WARRANTY

Global Specialties warrants this device to be free from defective material or workmanship for a period of 3 years from the date of original purchase. Global Specialties under this warranty is limited to repairing the defective device when returned to the factory,shipping charges prepaid, within three full years from the date of original purchase. Units returned to Global Specialties that have been subject to abuse, misuse, damage or accident or have been connected, installed or adjusted contrary to the instructions furnished by Global Specialties, or that have been repaired by unauthorised persons will not be covered by this warranty. Global Specialties reserves the right to discontinue models, change specifications ,price or design of this device at any time without incurring any obligation whatsoever. The purchaser agrees to assume all liabilities for any damages and/or bodily injury which may result from the use or misuse of this device by the purchaser his employees or agents. This warranty is in lieu of all other representations or warranties expressed implied and no agent or representitive of Global Specialties is authorised to assume any other obligation in connection with the sale and purchase of this device.

CASE DISASSEMBLY AND ASSEMBLY

WARNING

Potentially lethal AC power is present whenever theline cord is plugged into the AC outlet,even when the power switch is OFF. Always disconnect the power cord when opening the case. Avoid touching the fuse post on the inside of the unit.

Should access to the inside of the unit be required, proceed as follows

1. Remove the line cord from the AC outlet before disassembly

If a load change causes the current limit to be exceeded, the power supply will automatically cross over to constant current output at current limit and output voltage will drop proportionately. In setting the current limit, allowance must be made for high peak currents which can cause unwanted crossover.

CONSTANT CURRENT MODE :

To select a constant current output, proceed as follows :

a. Short circuit the output terminals of the power supply.

b. Connect a DC Ammeter OR a shunt-digital voltmeter

(DVM) combination across the output terminals, ing appropriately-guaged wire and hardware. The recommended current ratings for the ammeter or

2. To disassemble the case,remove the screws that secure the cover to the chassis and lift the cover off.

3. To reassemble the case, place the cover on the

chassis, line up the screw holes, and replace the

screws.

MAINTENANCE AND RECALIBRATION

ADJUSTMENTS :

All circuitry is factory -calibrated. No user adjustments are required.

FUSE REPLACEMENT :

Remove the line cord from the AC outlet before changing fuses. Using the screwdriver, remove the fuse holder cap. Replace the fuse with another of identical type and current rating. Replace the fuse holder cap.

the shunt and the wire must be at least 10% more than the output current of the power supply model. The ammeter or shunt-DVM combination must be rated better than 0.5% accuracy.

c. Turn the VOLTAGE controls clockwise. And Turn the

CURRENT controls slowly clockwise. The CURRENT control range will be from minimum to maximum rated output current. Adjust CURRENT controls for desired output current.

d. Compare the ammeter reading with the front panel

ammeter reading. Or, compare the DVM reading with the front panel ammeter reading using I = V/R, where

V is the DVM reading and R is the DC shunt sistance. e. Open output terminals and adjust VOLTAGE

controls for maximum output as required by the load

conditions.

If a load change causes the voltage limit to be

exceeded, the power supply will automatically cross

over to constant voltage output at the preset voltage

limit and output current will drop proportionately. In

setting voltage limit, allowance must be made for

high peak voltages which can cause unwanted

crossover.

LOAD CONNECTIONS :

The load should be connected to the power supply output terminals using separate pairs of connecting wires. This will minimize mutual coupling effects between loads and will retain full advantage of the low output impedance of the power supply. Each pair of connecting wires should be as short as possible and twisted or shielded to reduce noise pick up. (If a shielded pair is used, connect one end of the shield to ground at power supply and leave the other end unconnected).

Positive or negative voltage can be obtained from this supply by grounding either one of the output terminals or one end of the load. Always use two leads to connect load to the supply, regardless of where the set up is grounded. This will eliminate any possibility of the output current return paths through the power source ground which would damage the line cord plug. This supply can also be operated upto ±300V DC above ground, if neither output terminal is grounded.

POWER SUPPLY OPERATION

INITIAL SET UP :

Refer to the preceding section for initial set up of the power supply.

OPERATING INSTRUCTIONS :

Proper operation of most circuitry depends on correct supply voltages. It is recommended that the power supply be set to the required voltage levels with the load disconnected. When the desired voltage is set (using the variable voltage control),turn the AC power OFF, connect the load to the power supply. then turn the AC power ON. Output voltage and current of the power supply may be read on the separate digital panel meters continuously.

OPERATING PRECAUTIONS

The power supply is ideally suited for virtually any type of IC bread boarding from TTL, CMOS and ECL to op-amps, audio and video amps, phase locked loops, and microprocessor circuitry. However,certain normal bread boarding precautions should be taken to avoid ground loops and inadvertent loading. Observance of correct load polarity is also important since most ICs may be damaged by improper power supply connections.

POLARITY :

Observe proper polarity when connecting the power supplies to the load, especially if the load is polarity sensitive and does not have reverse polarity protection.

GROUND LOOPS :

A ground loop is a voltage drop on a ground bus caused by a power stage output entering the ground bus some distance away from the power supply ground binding post. This small voltage drop, though only milliVolts or micro Volts, is a part of the output load. If a preamplifier input of circuit ground is connected to a portion of this ground bus, feedback and oscillation may occur. To prevent this all output stages should be positioned as close as possible to the ground terminal,preamps farther away. Many audio IC's have seperate input and output grounds to prevent ground loops. Eventhough power supplies are tightly regulated, a short length of a power bus can present enough inductance to cause linear IC oscillation at high frequencies. For this reason, effective bypass capacitors are needed to bypass the power buses. Place these capacitors as close as possible to the power supply pins of the IC.Disc ceramics (0.1µF ) work well and should be placed across as many ICs as possible. Do not use elec trolytic or paper capacitors because they have high inductances and cease to act as bypasses above one or two MHz. Bypassing is required with digital IC's also; problems such as inability to reset or to clear and false triggering can occur if IC's are not properly bypassed.

Global Specialties 1332A User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual