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page 10
RET — 041 Instructions
95307-000-01 6/87
This change affects the following pages in the 9100 A Operating Manual:
2- 3
" Various Application Notes: Monitor Rolloff Filters "
3- 10
" Installation: Monitor Rolloff Filter "
5- 3
" Operating Instructions: Monitor Rolloff Filter "
3) Low-pass filtering is selected by jumpers on Card #1F1O. Day and night 10kHz low-pass
filtering is specified in the NRSC standard. 5kHz and 12kHz low-pass filtering are also
available. Any of these three low-pass filtering options may be chosen for day operation,
and the same or either of the other two may be chosen for night operation.
These changes in low-pass filtering options affect the following pages:
1-1
" Introduction and System Description "
1-7, 1-8
" Introduction: Output Low-pass Filter and Safety Clipper "
2-5
" Various Application Notes: 5kHz Bandwidth Limitation "
4) Card #1F1O replaces Card #1 or #1-F. Schematics and assembly drawings for Card #1F1O
are included in these instructions.
5) The specifications after installation of this retrofit are essentially the same as those given
in Appendix L of the 9100A Operating Manual. With the NRSC 10kHz low-pass filter in
the circuit, total system frequency response is better than +0.5dB, -2.0dB, 5O-96OOHz.
PTIM D is a registered trademark of
rban Associates Inc.
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