GW Instek GFG-813 User Manual

PE-C4-410

PAGE 1

GOODWILL INSTRUMENT ( MALAYSIA ) SDN. BHD.

CALIBRATION STANDARD

PROCEDURES

FUNCTION GENERATOR

MODEL : GFG-813

APPLICABLE ODM MODEL :

FG-813; BK-3040

GW GOODWILL INSTRUMENT ( M ) SDN BHD.

APPROVED BY CHECKED BY PREPARED BY

TOTAL PAGE : 15

( INCLUDING COVER PAGE )

FOR INTERNAL USE ONLY

MODEL: GFG-813

PAGE

:

2

CALIBRATION PROCESS

STATION : PRE-ADJUST

NO

Adjustment

Location

Particular

Specification

Remarks

1

Initial Setting.

POWER Switch = ON;

Instrument Used :

EXT COUNTER : release all buttons;

20Mhz O'scope

MAIN GENERATOR : AMPL=Max, ATT= Release,

OFFSET & SYM= Push, TRIGGER PHASE=Free run;

MODULATION : AM, FM & SWP=Release,

MODULATION Output=Max, SYM=CAL.

2

Puncture [ HI POT] Test.

Connect AC cord's GND, Life & Neutral pins respective.

GPT-515A :

O/P voltage

= 1.5 KV

Cutoff Current = 1 mA

Timer

= 60 Sec

3

Functioning Check.

Check the function of all VRs & button switches

20Mhz O'scope

corresponing to the output waveform.

4

Burn - in.

Deliver the sets to the burn-in chamber.

50 / 4 Hours

GOODWILL INSTRUMENT

APPROVED BY

CHECKED BY

PREPARED BY

APPLICABLE ODM MODEL :

(MALAYSIA) SDN. BHD.

FG-813

ENGINEERING DEPARTMENT

BK-3040

FOR INTERNAL USE ONLY				MODEL: GFG-813			PAGE	:	3
	CALIBRATION PROCESS						STATION :		1	of	5
NO	Adjustment	Location		Particular			Specification				Remarks
1	Initial Setting		POWER Switch = ON;							Instrument Used :
			EXT COUNTER : release all buttons;							1. Dmm [GDM-8045G]
			MAIN GENERATOR : AMPL=Max, ATT= Release,							2. 20Mhz O'scope
			OFFSET & SYM= Push, TRIGGER PHASE=Free run;							3. 10 Mhz Standard Timebase
			MODULATION : AM, FM & SWP=Release,							4. Leveled Sinewave
			MODULATION Output=Max, SYM=CAL.							Generator [SG-503]
2	+ 17V Adjust.	VR101	Measure the output voltage of R101 lead (right) relative				+ 17 +/- 0.01V			DMM : 20 VDC
		{GFG-427}	to GND, adjust VR101 to get +17.0V show on DMM.
3	- 17V Adjust.	VR102	Measure the output voltage of R102 lead (left) relative				- 17 +/- 0.01V			DMM : 20 VDC
		{GFG-427}	to GND, adjust VR102 to get -17.0V show on DMM.
4	Offset Null Adjust.	VR207	Dial scale=Max, Main Generator RANGE=100;							DMM : 200 mVDC
		{GFG-428}	Measure the voltage drop on R237 or R238 relative to
			GND by using DMM. Adjust VR207 to get a reading of
			110mV.
5	EXT Counter	VR001	COUNTER=Ext, GATE Time=0.1sec, 1/10 @ 1/1				<= 15 mVrms			SG 503 : 15 mVrms
	Sensitivity Adjust.	{GFG-429}	button=Release; Apply a 10 Mhz 15 mVrms Sinewave							Freq : 10.0 Mhz &
			signal to EXT COUNTER Terminal, adjust VR001 until							30.0Mhz
			the display is stable. Check the display steadiness of
			multiple level X1, X.1 & X.01[SG 503] for EXT ATT=1/1
			and X1 & X.1 for EXT ATT=1/10. Push 30M/10M button
			to select 30M; Repeat the above checking procedures
			for the range of 30 Mhz by apply 30Mhz 15 mVrms
			sinewave signal to EXT COUNTER Terminal.
6	EXT Counter 10Mhz	VC001	GATE Time=1sec,10M/30M=Release;				10 Mhz +/- 100 hz
	Timebase Adjust.	{GFG-429}	Apply 10 Mhz standard Time base to EXT COUNTER
			Terminal, adjust VC001 until the counter reads 10Mhz.
GOODWILL INSTRUMENT		APPROVED BY		CHECKED BY	PREPARED BY					APPLICABLE ODM MODEL :
(MALAYSIA) SDN. BHD.											FG-813
ENGINEERING DEPARTMENT											BK-3040

FOR INTERNAL USE ONLY					MODEL: GFG-813		PAGE	:	4
	CALIBRATION PROCESS						STATION :		1	of	5
NO	Adjustment	Location			Particular		Specification				Remarks
7	Main Generator Output			Connect MAIN O/P terminal to the o'scope without 50			Without 50 Ohm Load :			O'scope Setting :
	Level Check.			Ohm load, check output level of sinewave, trianglewave			20 ~ 25 Vpp			T/D = 1 mS
				& squarewave. Repeat the checking procedures by			With 50 Ohm Load :			V/D = 5 V [Without Load]
				connect the O'scope to MAIN O/P terminal through a			10 ~ 13 Vpp			V/D = 2 V [With Load]
				50 Ohm load.
8	SYNC Output Level			Set GFG-813 as step 6, Connect SYNC OUTPUT to			Without 50 Ohm Load :			O'scope Setting :
	Check.			O'scope, check output level of sinewave, trianglewave			> 1 Vpp			T/D = 1 mS
				& squarewave. Repeat the checking procedures by			With 50 Ohm Load :			V/D=0.2V [Without Load]
				connect the O'scope to MAIN O/P terminal through a			> 0.5 Vpp			V/D=0.2V [With Load]
				50 Ohm load.
9	Modulation Generator			MODULATION : RANGE=10K, Freq=Max;
	Output Level Check.			Connect MOD. OUTPUT to O'scope, check sinewave,
				trianglewave & squarewave output level.
GOODWILL INSTRUMENT			APPROVED BY		CHECKED BY	PREPARED BY				APPLICABLE ODM MODEL :
(MALAYSIA) SDN. BHD.											FG-813
ENGINEERING DEPARTMENT											BK-3040

FOR INTERNAL USE ONLY				MODEL: GFG-813			PAGE	:	5
	CALIBRATION PROCESS						STATION :		2	of	5
NO	Adjustment	Location		Particular			Specification				Remarks
1	Initial Setting.		MAIN GENERATOR : AMPL=Max, SYNC=Push,							Instrument Used :
			OFFSET=Push, ATT=Release, TRIGGER PHASE =							1. Frequency Counter
			Free Run;							[GFC-8130G]
			MODULATION : AM, FM & SWP = Release.							2. 100 Mhz O'scope
2	Main Generator Dial	VR201	Dial Scale=Max, RANGE=1K, Counter EXT/INT=Release				< 0.5 %			100Mhz O'scope :
	Scale MAX Squarewave	VR204	Main FUNCTION=Squarewave;Connect SYNC output							V/D=5V , T/D=2uS;
	Symmetry Adjust.	{GFG-428}	to Freq Counter [GFC] & MAIN output to a 100Mhz							GFC-8130G Setting :
			O'scope.Adjust VR201 so that the reading show on GFC							FUCTION=FREQ A
			is 13.4Khz. Adjust SWEEP VAR of O'scope to get a							GATE TIME=Push & Min
			positive halfcycle of 10 div show on CRT. Select the							TRI LEVEL=Push
			the SLOPE to -ve,adjust VR204 to get a balanced							LPF,ATT,COUP=Release
			waveform.
3	Main Generator Dial	VR205	O'scope sweep variable=lock;							100Mhz O'scope :
	Scale MIN Squarewave	VR206	Dial Scal=Min, Adjust VR206 to get a 5 Div positive							V/D=5V , T/D=1mS;
	Symmetry Adjust.	{GFG-428}	cycle and adjust VR205 to get 5 Div negative cycle.
4	Main Generator Dial	VR201	Loosen dial scale lock nut, adjuts dial scale to get a							GFC-8130G Setting :
	Scale Accuracy Adjust.	{GFG-427}	balance on 1 & 10 scale; tighten the lock nut, turn dial							FUCTION=FREQ A,
			scale to 10, adjust VR201 to get 10Mhz. Make sure							GATE TIME=Push & Min,
			the output freq of dial scale Max is greater than 13Mhz.							TRI LEVEL=Push,
5	Main Generator Dial	VR205	Dial Scale=Min; Connect SYNC output to GFC input				94.5 to 95.5 Hz			100Mhz O'scope :
	Scale MIN Frequency &	VR206	terminal & MAIN output to O'scope with BNC-BNC.							V/D=5V , T/D=0.5mS;
	Squarewave Symmetry	{GFG-427}	Set O'scope T/D=0.5mS, adjust O'scope SWEEP VAR							GFC-8130G Setting :
	Adjust.		to get a 10 Div positive cycle. Set O'scope triggering							FUCTION=FREQ A,
			to -ve slope; adjust VR205 to get a 10 Div negative cycle.							GATE TIME=Push & Min,
			Check GFC reading to make sure that the output freq							TRI LEVEL=Push,
			is within 94.5 to 95.5 Hz. If not, re-adjust VR205 &							LPF,ATT,COUP=Release
			VR206 with condition that the duty cycle must balance.
GOODWILL INSTRUMENT		APPROVED BY		CHECKED BY	PREPARED BY					APPLICABLE ODM MODEL :
(MALAYSIA) SDN. BHD.											FG-813
ENGINEERING DEPARTMENT											BK-3040