Can you tell me if we can order your modulators, for exampe ref. 5845 in the SECAM B
In terms of channel modulation there are no differences between PAL B and SECAM B.
The only difference is the colour code.
But the colour code is included within the luminance.
The case would be quite different if you were feeding the modulator with PAL to obtain SECAM at the output.
This would not be possible as the modulator does not perform transcodification from PAL to SECAM.