‘I%hle nf Contents
Model 204C/U
--o-
I. GENERAI. INFORMATION, l-l
1.3. Specificatiorrs Rntl General Information. l-l
I -I 3. Acccs&ics Available .............
1-I 5. lnsw~mcnt and Manual Identification
I .I 7. Change Sheets. .................
1.19. Options Available ..............
1”5. Description 1.1
1-2
I-2
1-2
l-2
Section Page
II,
INSTALLATION ..................... 2-I
2-1, Introduction .................... 2.1
2-3. Inspection ...................... 2-I
2-S. Yowcr Requirements ............... 2-I
2.7. Grwndinp Requirements ............ 2-l
2.9.
lmtaliatio” .................... 2-l
2-I 1. I<wk/Bench Installation ........... 2-l
2.13. Repackaging fur Shipment .......... 2-l
III. OPERATING INSTRUCTIONS.
3-l. Inl~roduction
3.3. Instrumcrll Description.
3-5. Turn On Proccdurc
3-7. Operating Considerations
3-x.
Floating ourpur
3.10 Synchronization.
3.13. Low Distortion.
3.15. Mu&l 204D Output
3.18. linll~cry Operation
Page
3-l
3.1
3-I
3-l
3-l
3-l
3-l
3-l
3.4
3.4
3.19. Rcchargcable Battery Operolion 3.4
3.25. Rccharecabic Nickel-Cadmium I3alwxics 34
TABLEOFCCINTENTS
PlOP Page
1-I. Intioduction. l-l
Section V (Cont’d)
s-9.
Attenuator Accuracy
(Model 204D only)
S-10. Output Control Check
(Models 204C and HZ0 only).
5-I 1, Output C!ontrul Cheek
(M&l 204D unl~)
5.12. Mance Check
5.13. Sync Output Check.
5.14. Sync Input Cheek,
5.15. Prcqucncy Range Cheek.
S-1 6. Hum and Noise Check
S-17. Checks of Gelleral Operaling
Characteristics
5.18. Output Voltage and
Impedance Checks.
5.19, Sync Impcdancc Cheek
5.20. Cuvcr Rrmuvsl
5.25. Adjustment and Calihrarian
Procedure
5.26. Introduction
5.29, Power Supply.
5.3I.
Bias Adjurtmcnt
5.33. AGC arid Fi’equency Adjustment.
5.34. High Frequency Adjustment.
5-35, Distortion Adjustment,
S-36. Fsctoiy SCIwtcd Cumpuncnls
S-38, Truublcshwliny Proccdurcs
5.39. F,“,l,. I’HIICI Yruccdurc
541, Detailed Cirwil Twuhlcshooling
545. Battery Replacement,
5”4
5.4
5-5
5.5
s-5
S-5
S-6
S-6
5-l
5-7
S-l
5-l
5.8
5.8
5-R
s-u
5-8
5.8
s-u
s-o
S-8
s-9
5-v
5-i)
3.32. Cycle-fife of Nickel.Cadmium Hatt,crics 3-5
3J8. Mercury Uattcry Operation. 3-5
Sccliun
I”. CIKCUIT DESCRIPTION
section
“I. REPLACEABLE PARTS
h-l, Intruduction.
6.4. Ordering Information
6-h. Nun-Listed Parts
Page
4.1
4-1. Inhodoction. 4-l
Bridge and Amplifier. 4-I
Peak Cumparatorand AGC. 4-I
4-2
4,2
4-3
Section
4-4, Block Diwarn Descrintion 4-l
I
4-I 3. 600 Ohm At~tcm~~tur.
4.16. Dctailcd Cixuit Description
4-24. I’w,cr Supply.
VII, CIRCUIT DIAGRAMS.
7-2. Introduction
7-3. Schematic Diagrams.
7.5. Cornponcnt, Location Diagrams
Seelion
VIII. BACKDATING.
,, . . .,
Page
I-1
7-l
l-1
l-1
Page
8-l
D-l. I”~,w.l”Cl,O”. X-l
8.4. Chance No, I for 204C Serial No. 808-O 1245
MAINTENANCt. .. ..........
5-1, Introductiozl. ...... ......
5.4. Perfurmance Checks. .......
5.6. Uiel Accuracy Check. ......... ..
5.7. Flatness Check, ............
S.8. Distortiw Cheek ...........
il
5-l
5.1
5-l
5-I
S-3
and-low: 2O4C-I-120 Serial No. 808.00845
and IDWCl U-1
8-5.
Change No. 2 for 204C Serial No. 9 I K-02 I20
and lower; 204C-1120 Serial No. Y 1%OlY70
and lower: 2041) Serial No. 910.OOIYS
and low, 8.1
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