Marconi TF 2304 Miernik poziomu
Producent:
Model:
TF 2304
Data:
1975
Kategoria:
Grupa:
Opis:
FM/AM Modulation Meter

Informacja

INTRODUCTION FM/AM Modulation Meter type TF 2304 has been designed primarily for the servicing and production line testing of mobile radio transmitters. It covers the frequency bands most commonly used forfixed and mobile communications and particular attention has been paid to the provision of facilities and Accessories required for the field testingof mobile equipment. The instrument incorporates automatic tuning over the carrier frequency range of 9 to 12.5 MHz and 18 to 1000 MHz and also provides automatic level control provided the input signal to the instrument is within specified limits. Panel lamps are provided to indicate when the r„ f. input level is too high or too low. With a suitable input the TF 2304 automatically locks to the carrier signal, the level is automatically set, the meter settles, and a reading can be taken in about five seconds. Measurements can be made, on f.m. transmitters, of both positive and negative deviations at modulation frequencies of 50 Hz to 9 kHz. Eight selectable ranges between 1.5 kHz f,s..d, and 150 kHz f.s.d. are provided. On a.m. transmitters depth measurements up to 95% at modulation frequencies between 50 Hz and 9 kHz can be made at carrier frequencies up to 400 MHz. Peak or trough indication can be selected by a switch. Although measurements are normally made by means of meter readout, i.f. and demodulated outputs are available at the front panel for examination or analysis. A switched de-emphasis facility is provided for the demodulated output to restore a modulation signal that has had preemphasis applied. The instrument can operate from an a„c. mains supply or from an optional rechargeable nickel cadmium battery pack mounted inside the instrument case. The instrument can be operated from the battery pack all day (the continuous operational life of the batterypack is about 8 hours) then charged up overnight using the built-in chargor

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Serwis i User Manual
Typ ręczny:
Serwis i User Manual
Strony:
52
Rozmiar:
55.15 Mbytes (57830537 Bytes)
Język:
english
Rewizja:
Ręczny ID:
H 52304 - 900S
Data:
Jakość:
Skanowany dokument, czytając częściowo źle, nie częściowo czytelny.
Data przesłania:
2016 06 05
MD5:
1b06d9f611152fddb5fbc4d9ed7bb550
Pobrane:
1307
Serwis i User Manual
Typ ręczny:
Serwis i User Manual
Strony:
54
Rozmiar:
22.73 Mbytes (23833831 Bytes)
Język:
english
Rewizja:
Ręczny ID:
Data:
1978 10 01
Jakość:
Skanowany dokument, czytając częściowo źle, nie częściowo czytelny.
Data przesłania:
2019 01 06
MD5:
eca0f3af7c2b527ef876b313e36c3c96
Pobrane:
659

Informacja

12 2.4 Sequence of operation ... 14 2.6.1 20 dB, 20 W Attenuator (54431-021B) ... 19 3.7 IF Amplifier ... 57

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