13-03-2018, 07:38 PM
Here are a couple of datapoints on French TV receiver vision bandwidths.
The first is from Wireless World 1959 October, page 456:
“Quotation of the vision bandwidth is also very common in France. 9 Mc/s was the usual figure given but 10 Mc/s was also often quoted.”
The nominal transmitted vision bandwidth was 10.4 MHz.
The second is Carnt & Townsend, Volume 2, page 211:
“Cheaper receivers use the same narrow-band I.F. for both standards, but better models use a 9 MHz I.F, with a narrow-band filter after the U.H.F. tuner.”
That was referring to early French dual-standard colour receivers, but I imagine that it was derived from preceding dual-standard monochrome receiver practice.
Cheers,
Steve
The first is from Wireless World 1959 October, page 456:
“Quotation of the vision bandwidth is also very common in France. 9 Mc/s was the usual figure given but 10 Mc/s was also often quoted.”
The nominal transmitted vision bandwidth was 10.4 MHz.
The second is Carnt & Townsend, Volume 2, page 211:
“Cheaper receivers use the same narrow-band I.F. for both standards, but better models use a 9 MHz I.F, with a narrow-band filter after the U.H.F. tuner.”
That was referring to early French dual-standard colour receivers, but I imagine that it was derived from preceding dual-standard monochrome receiver practice.
Cheers,
Steve
