请看下面滤波器产品规格，能生产的厂家请联系，qq：397819834 另外，客户的几个问题：1 如果客户要10个产品试单，单价多少？ 2 如果样品合格后，将会要求生产至少25000个，单价多少？ Function: - Downstream: signal coming from the port 1 is filtered out by the filter (see specification below) and then combined with the input from port 2 - Upstream: signal from port 3 (for frequencies from 5 to 70 MHz) is directed to port 1 exclusively Port Usage: The 3 ports have the following characteristics: - Port 1: Input for frequencies from 87.5 to 862 MHz and output for frequencies from 5 to 70 MHz - Port 2: Input for frequencies from 87.5 to 862 MHz; no output - Port 3: Input for frequencies from 5 to 70 MHz and output for frequencies from 87.5 to 862 MHz The signal injected on Port 2 is analogue PAL (PAL B/G standard) The signal coming on Port 1 is a mix of analogue PAL (PAL B/G standard), digital TV (DVB-C) and EuroDOCSIS signals Requirements: - Adjacent channels must not be filtered out. The adjacent channels are digital (DVB-C) or EuroDOCSIS - Channel suppression > 50 dB - Group delay inequality should be smaller than 200 ns on every unfiltered channel - Connectors are 75 Ohms, F-type female Channels to be filtered out: The channels to be filtered out are analogue (PAL B/G standard) The filter shall eliminate the following PAL channels (in parenthesis, the channel frequency borders) Keep in mind European channel numbering! : - Radio to S20 (87.5 MHz - 300 MHz) - S22 to S24 (310 MHz – 334 MHz) - S33 (398 MHz – 406 MHz) - S37 (430 MHz – 438 MHz) - 22 (478 MHz – 486 MHz) - 31-33 (550 MHz- 574 MHz) - 35 (582 MHz – 590 MHz) - 37 (598 MHz – 606 MHZ)
