Equipment information
Marconi TF 2304 Level Meter
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Model:
TF 2304
Date:
1975
Category:
Group:
Description:
FM/AM Modulation Meter
Information
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
Manual Type:
Service and User Manual
Pages:
52
Size:
55.15 Mbytes (57830537 Bytes)
Language:
english
Revision:
Manual-ID:
H 52304 - 900S
Date:
Quality:
Scanned document, reading partly badly, partly not readable.
Upload date:
2016 06 05
MD5:
1b06d9f611152fddb5fbc4d9ed7bb550
Downloads:
1307
Manual Type:
Service and User Manual
Pages:
54
Size:
22.73 Mbytes (23833831 Bytes)
Language:
english
Revision:
Manual-ID:
Date:
1978 10 01
Quality:
Scanned document, reading partly badly, partly not readable.
Upload date:
2019 01 06
MD5:
eca0f3af7c2b527ef876b313e36c3c96
Downloads:
659
Information
12
2.4 Sequence of operation ... 14
2.6.1 20 dB, 20 W Attenuator (54431-021B) ... 19
3.7 IF Amplifier ... 57