Multi-Standard Analogue TV Demodulator
Showman 1000
2008 dB Broadcast Ltd
6
Provisional Version 0.3
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The Showman 1000 Multi-Standard Analogue TV Demodulator
The Showman 1000 Off Air Receiver from dB Broadcast is a multistandard (PAL / NTSC /
SECAM) analogue TV demodulator for professional broadcast applications and is capable of
receiving RF signals from most terrestrial or cable analogue broadcast TV standards.
Figure 1: The Showman 1000 Multi-Standard Analogue TV Demodulator
Two Showman versions are available:
A basic multi-standard S-Variant
An enhanced P-Variant with alarm/monitoring and IF I/O
The P-Variant has added IF input and output capability along with monitoring and alarm
functions – including a Status Log facility that can time and date stamp various alarm events
for later analysis. The P-Variant is also capable, when receiving BTSC audio (Standard M),
of providing simultaneous outputs of both Stereo and SAP (Second Audio Program).
Demodulation is to base-band colour composite video and stereo audio (where available).
The optional IF input and IF output is on 38.9MHz vision carrier frequency for all standards*.
Demodulator functions may be controlled either via the front panel LCD (Liquid Crystal
Display) and key menu system or via an RS232 Serial Port.
Note:
*A single standard Showman 1000 Demodulator, dedicated to 45.75MHz IF frequency
is also available. (N-variant, not covered by this manual).
Applications
Fixed Monitoring / MCR - Monitoring of outgoing TV signals
Analogue Cable head ends - Off air reception prior to modulation on to cable
Digital TV head ends - Off air reception of analogue services prior to MPEG encoding
Outside Broadcast monitoring - monitoring live programs and own
Transmission monitoring · News Gathering in fixed or mobile situations
Analogue TV Transmitter monitoring
