CIA-RDP78-03424A001300010002-6.pdf

Declassified in Part - Sanitized Copy Approved for Release 2013/08/15 : CIA-RDP78-03424A001300010002-6 a CONFIDENTIAL INSTRUCTICN MATERIAL For SINGLE SIDEBAND UNIT May 12, 1954 |pentne nett AP Sa Rey AY 2. 24 APR ves REV DATE _4* 1980 gy C6YS5 YO onic comp CSS op -5G type FO ORIG CLASS (oan PAGES _#=%O REV CLASS gust 222 __ next Ev %°/O. auto: HR 10-2 CONFIDENTIAL SECURITY INFORMATION Declassified in Part - Sanitized Copy Approved for Release 2013/08/15 : CIA-RDP78-03424A001300010002-6 50X1 50X1 -

" Declassified in Part - Sanitized Copy Approved for Release 2013/08/15 : CIA-RDP78-03424A001300010002-6 °° ~~ NFIVEN IAL ~CONFIDENTIAL- SINGLE SIDEBAND UNIT SPECIFICATIONS EXCITER UNIT: Chassis: rack mounting - 19 in. wide by 12: in, high Finish: grey Input: audio 1 volt @ 10,000 ohms ext, HFO | 3 volts @ 100 ohms Output: audio 0,5 volts @ 600 ohms 2.5 volts @ 2000 ohms rf, 15 volts @ 100 ohns Power Requirements: 115 volts, 60 eps, 135 watts POWER SUPPLY UNIT: (Model P-1) Chassis: rack mounting 19 in, wide by 5¢ in, high Finish: ' grey Type: regulated Power Requirements: 115 volts, 60 cps, 45…

Declassified in Part - Sanitized Copy Approved for Release 2013/08/15 ; CIA- RDP78- 03424A001300010002- 6 _ YN IDEN LLAL ENTTAL-= Frequency Range (in kilocyeles ) Band Output Frequency A 125 to 250 B 250 to 500 Cc 500 to 1000 D 1000 to 2000 E 2000 to 4000 ¥ 4000 to 8000 Mixer Frequency is 1/2 Output Frequency. &, C6102-—VYernier, fine tuning 9, Sl --—-Sideband selector 10, S2 -—--<Yo obtain correct sense of envelope when using square law, 11, $3 =-Extemel-Internal HFO switch 12, S4 —-Meter Selector 13, S5 ---Range Selector » Mixer output . Doubler output » Ouput plate tank circuit e RF output …

- Declassified in Part - Sanitized Copy Approved for Release 2013/08/15 : CIA- RDP78- 08424001300010002- 6 A EY MAE A block diagram of the equipment as shown in Figure 5, Theory of Operation is outlined in the following Section, The use of a fixed oscillator permits phase modulation at one frequency. This eliminates tuning critical phase nodulator circuits in covering the wide range of output frequencies. A balanced mixer balances out the funda= mental beating oscillator component. This prevents the oscillator voltage in the mixer plate circuit from predominating over the signal voltage. When …

- UALITUN pry 6 or Declassified in Part - Sanitized Copy Approved for. Release 2013/08/15 : CIA-RDP78-03424A001300010002-6 maintained as outlined below, The phase inverter’ and sense switch provide for applying the square law characteristic in the correet sense to the sig- nal envelope. This suiteh has no effect when the "normal" output is used, The output amplifier ‘aixdio provides sufficient output to feed a low imped= ance line, This output feeds the modulation input circuit of the auxiliary transmitter, To obtain a given output frequency from this unit, a crystal or an external input volta…

Declassified in Part - Sanitized Copy Approved for Release 2013/08/15 : CIA-RDP78-03424A001300010002-6 CONFIDENTIAL oresent system is shown in basic form in Figure 2. It should be noted that V2 in Figure 2 is not a balanced form of modulator, and that its r-f input consists of the carrier shifted 90 degrees plus the modulation products generated in Vl, This arrangement of V1 and V2 leads to the generation of higher order sidebands which are not present in the arrangement of Figure 1, In practice, Vil balanced modulator and the reinserted 90 degree ref compon- ents are replaced by a phase modul…

OMAP AVET A Declassified in Part - Sanitized Copy Approved for Release 2013/08/15 CIA- RDP78- 034244001300010002- 6 FLUENT plus phase modulation components (4, 5, 6, 7) sidebands due to the ampli- tude modulation process are generated on all components present, New side- bands 2 and 3 are associated with 1 (carrier: $ and 9 are associated with 43 10 and 11 are associated with 53 and lesser sidebands not shown are as- sociated with 6 and 7.) Now when the amplitude modulation is at the same frequency as the phase modulation but removed 90 degrees in phase, relation- ships exist as shown in Mgure…

Declassified in Part - Sanitized Copy Approved for Release 2015) 3/08/15 : CIA-RDP78-034244001300010002-6 CUNFEDE YN rar? Detailed function of stages shown in the block diagram is as follows: Block 1. Oscillator-Vl.-6A06. This is an oven controlled erystal oscilla- tor which provides a stable frequency for phase modulation, Block 2, Phase Modulator-V2.-6AC7, This stage varies the phase of the r-f input in accordance with the audio input.' Block 3. Balanced Mixer-V3, V4-6BE6, 6AU6. The balanced mixer combines the phase modulated wave from V2 with the signal from the high frequency oscillator (H…