EMCEE Broadcast Products MBSR100MW Manuale Utente

 

 

MBS

 

Repeater 

U.S Patent #4,791,717, #5,020,149 

 

 

 
The EMCEE MBSR100MW is a professional solid state low-power MBS Band 
retransmission repeater (amplifier) system, and is formed from a combination of 
a pre-selected frequency input pre-amplifier module (P/N 701007) and an AGC 
controlled 100mW post amplifier module (P/N 50800002A), each of which is in a 
separate chassis/housing and connected via an interconnecting coaxial cable 
with Type ‘N’ connectors.  The system is capable of retransmitting from one to 
seven MBS channels with either analog NTSC or digital modulation.  The system 
provides an end-to-end electrical gain typically 70dB.  The system has no 
frequency generating circuits, and as such, the output carrier frequencies and 
modulations are dependent on the inputs.  The pre-amplifier contains a dual 
section inter-digital filter system which provides high Q MBS pass-band circuitry 
at the input stage. This is to prevent pre-amplifier input overloads due to out of 
band interference from close stations utilizing the LBS and UBS bands. The input 
pre-selection also prevents the retransmission of out of band signals. The output 
(post) amplifier has an output AGC range of 20dB, with a 20dBm average power 
output power threshold.  The AGC circuitry is designed to provide a constant low 
distortion output with varying input signal power levels due to fades and other 
signal anomalies. 
 
The system has the following average output power capability: 
 
1 Channel   @ 20dBm/Channel ±1dB (20dBm Composite Power) 
2 Channels @ 17dBm/Channel ±1dB (20dBm Composite Power) 
4 Channels @ 14dBm/Channel ±1dB (20dBm Composite Power) 
7 Channels @ 11dBm/Channel ±1dB (20dBm Composite Power) 
 
Warning: DO NOT EXCEED 20dBm Composite Power Output! 
 
 
PLANNING the INSTALLATION 
 
Proper installation pre-planning will yield the best performance of the installed 
system.