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Localización: Capital Federal

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drake vm 2551 - modulador de televisión comercial
modulador de televisión comercial broadcast
transmision profesional de televisión
drake vm 2551
vhf/uhf/catv
vm2551 technical specifications
rf
frequency range:
output level:
55 dbmv, return loss of 12 db nominal, (typically adjustable 40 to 55 dbmv)
output impedance:
75 ohms.
av ratio:
audio carrier -18 to -12 db refeernced to video carrier, adjustable.
freuqency stability:
visual carrier within ±5 khz on fcc offset channels, ±10 khz on all channels.maunal gain adjustment with front panel control and overmoudlation indiactor.54-550 mhz catv channels 2-78 and 95-99,
82 channels.(change internal jumper to activate.250 mv rms nominal. referenced to video carrier, measured at -15 db a/v ratio and with modulator output level of 55 dbmv
broadband nosie:
-75 dbc typical,
spurious outputs:
-60 dbc minmium.(4 mhz bw @ ±12 mhz or greater offset)
video
input level for 87.5%:
1 vp-p ±3 db, manual gain adujst with overmodulation indicator.
ttoal haromnic distrotion:
1.5% maxmium
hum and noise:
-60 dbm minimum, referenced to 25 khz peak devitaion.±1.5 db, defetaable
frequency resopnse:
5h0z to 15hkz,
referenced to 75 µsec.
off-air channels 2-27.
fcc frequency offsets:
automatic ( 12.5 khz or 25 khz for aeronautical channels)
in-channel c/n:
62 db typical, 60 db minimum.
4.5 mhz input level:
37 dbmv for -15 db a/v ratio.
tecnicos y empresas descuentos al gremio
potencia de salida - 55dbmv peak sync vsb
alimentacion - modificado a 220v
consumo - 16w. type \"f\" connector.pre-emphasis curve.unbalanced,
input impedance:
10k ohms.type \"f\" connector,
input impedance:
75 ohms.rca phono connector.
intercarrier frequency:
4.5 mhz ± 2 khz.
pre-emphasis:
75 µsec.) input connector is type \"f\".
frequency response:
30 hz to 4.2 mhz, ±1.5 db
audio
input level for 25khz peak deviation
@ 1khz tone:
175 mv rms minimum.

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