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+ | ====== E-648: ACL SR-209 ====== | ||
+ | **E-648**, **Astro Communications Lab. / ACL SR-209**; manufactured by [[ACL|Astro Communications Lab., Gaithersburg, | ||
+ | The modular SR-209 receiver manufactured by the US company Astro Communications Laboratory Inc., Gaithersburg, | ||
+ | |||
+ | The device was probably used as a predecessor of the VHF / UHF monitoring receiver [[E-649]] by the military radio monitoring service. | ||
+ | |||
+ | {{: | ||
+ | ===== Technical Data ===== | ||
+ | * [[Principle]]: | ||
+ | * [[Modes]]: [[A1]] with BFO, [[A3|AM (A3)]], [[F3|FM (F3)]] | ||
+ | * [[Frequency range]]: 30 - 100 MHz (VHF), 0.5-1 / 1-2 GHz (UHF) | ||
+ | * **Analog dial** | ||
+ | * [[Sensitivity]]: | ||
+ | |||
+ | ==== Power Supply ==== | ||
+ | * [[Mains]]: 220 V | ||
+ | |||
+ | ==== Dimensions ==== | ||
+ | |||
+ | ==== Accessories ==== | ||
+ | |||
+ | ---- | ||
+ | |||
+ | {{: | ||
+ | ===== Operation ===== | ||
+ | The receiver is installed in a 19 inch cabinet, in contrast to the standard configuration with only one " | ||
+ | |||
+ | The entire receiver is constructed in a modular design, to the basic unit, a panoramic display and the tuning heads are added. By selecting different tuning heads and also IF modules with different IF bandwidths from 10 kHz - 8 MHz, the receiver is extremely flexible. | ||
+ | |||
+ | The unit is switched on and the corresponding " | ||
+ | In addition to the signal strength and FM center meters, the RF gain, audio & video output level controls as well as the headphones jack is located on the center unit. | ||
+ | |||
+ | In the ACL Signal Display Unit, a small CRT acts as panoramic display, the signal level and the width of the frequency section can be adjusted. Even short-term transmissions appear as short peaks on the display, the operator can tune the set to the detectable signal peaks. | ||
+ | |||
+ | In the receiver variant used by the Swiss Army, the set comes with a basic unit and tuning heads SH-201P which covers the military VHF range, while the tuning heads SH-204P and SH-205P cover the UHF / SHF range from 0.5 to 2 GHz. | ||
+ | |||
+ | Available tuning heads from the manufacturer: | ||
+ | * SH-201P : 30 - 100 MHz | ||
+ | * SH-202P : 90-300 MHz | ||
+ | * SH-203P : 250 - 500 MHz | ||
+ | * SH-204P : 490 - 1000 MHz | ||
+ | * SH-205P : 990-2000 MHz | ||
+ | |||
+ | ===== Technical Principle ===== | ||
+ | The block diagram reveals, that the input signal coming from one of the tuning heads is fed to one of the IF modules A3 (IF bandwidth > 250 kHz), A4 (50 - 250 kHz) or A5 (IF bandwidth below 50 kHz) and then to the demodulator module A6 to the audio frequency amplifier A8; the CDR / squelch amplifier A9 controls the muting function and the video amplifier in module A7 controls the panoramic display. | ||
+ | |||
+ | ==== Semiconductor setup ==== | ||
+ | The set is solid state. | ||
+ | |||
+ | ==== Development ==== | ||
+ | [[ACL]] has developed the SR-209 in around 1965. | ||
+ | |||
+ | ==== Field use ==== | ||
+ | |||
+ | ==== Variants ==== | ||
+ | |||
+ | {{gallery>: | ||
+ | ===== Manuals ===== | ||
+ | |||
+ | ==== Additional information ==== | ||
+ | * [[http:// | ||
+ | * [[https:// |
en/e-648.txt · Zuletzt geändert: 2019/04/09 16:41 von 127.0.0.1